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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2013 Nikita Karetnikov <nikita@karetnikov.org>
+;;; Copyright © 2013, 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2013, 2014, 2015, 2016 Andreas Enge <andreas@enge.fr>
+;;; Copyright © 2014, 2015 Mark H Weaver <mhw@netris.org>
+;;; Copyright © 2014, 2017 Eric Bavier <bavier@member.fsf.org>
+;;; Copyright © 2014, 2015 Federico Beffa <beffa@fbengineering.ch>
+;;; Copyright © 2015 Omar Radwan <toxemicsquire4@gmail.com>
+;;; Copyright © 2015 Pierre-Antoine Rault <par@rigelk.eu>
+;;; Copyright © 2015, 2016, 2017, 2018, 2019 Ricardo Wurmus <rekado@elephly.net>
+;;; Copyright © 2015, 2016 Christopher Allan Webber <cwebber@dustycloud.org>
+;;; Copyright © 2015 Eric Dvorsak <eric@dvorsak.fr>
+;;; Copyright © 2015, 2016 David Thompson <davet@gnu.org>
+;;; Copyright © 2015, 2016, 2017 Leo Famulari <leo@famulari.name>
+;;; Copyright © 2015, 2017 Ben Woodcroft <donttrustben@gmail.com>
+;;; Copyright © 2015, 2016 Erik Edrosa <erik.edrosa@gmail.com>
+;;; Copyright © 2015, 2016, 2017, 2018, 2019 Efraim Flashner <efraim@flashner.co.il>
+;;; Copyright © 2015, 2017 Kyle Meyer <kyle@kyleam.com>
+;;; Copyright © 2015, 2016 Chris Marusich <cmmarusich@gmail.com>
+;;; Copyright © 2016 Danny Milosavljevic <dannym+a@scratchpost.org>
+;;; Copyright © 2016 Lukas Gradl <lgradl@openmailbox.org>
+;;; Copyright © 2016, 2018 Hartmut Goebel <h.goebel@crazy-compilers.com>
+;;; Copyright © 2016 Daniel Pimentel <d4n1@d4n1.org>
+;;; Copyright © 2016 Sou Bunnbu <iyzsong@gmail.com>
+;;; Copyright © 2016, 2017 Troy Sankey <sankeytms@gmail.com>
+;;; Copyright © 2016, 2017 Nils Gillmann <ng0@n0.is>
+;;; Copyright © 2016 Dylan Jeffers <sapientech@sapientech@openmailbox.org>
+;;; Copyright © 2016 David Craven <david@craven.ch>
+;;; Copyright © 2016, 2017, 2018 Marius Bakke <mbakke@fastmail.com>
+;;; Copyright © 2016, 2017 Stefan Reichör <stefan@xsteve.at>
+;;; Copyright © 2016 Dylan Jeffers <sapientech@sapientech@openmailbox.org>
+;;; Copyright © 2016, 2017 Alex Vong <alexvong1995@gmail.com>
+;;; Copyright © 2016, 2017, 2018 Arun Isaac <arunisaac@systemreboot.net>
+;;; Copyright © 2016, 2017, 2018 Julien Lepiller <julien@lepiller.eu>
+;;; Copyright © 2016, 2017, 2018 Tobias Geerinckx-Rice <me@tobias.gr>
+;;; Copyright © 2016, 2017 Thomas Danckaert <post@thomasdanckaert.be>
+;;; Copyright © 2017 Carlo Zancanaro <carlo@zancanaro.id.au>
+;;; Copyright © 2017 Frederick M. Muriithi <fredmanglis@gmail.com>
+;;; Copyright © 2017, 2018 Adriano Peluso <catonano@gmail.com>
+;;; Copyright © 2017 Ben Sturmfels <ben@sturm.com.au>
+;;; Copyright © 2017, 2018 Mathieu Othacehe <m.othacehe@gmail.com>
+;;; Copyright © 2017 José Miguel Sánchez García <jmi2k@openmailbox.org>
+;;; Copyright © 2017 Roel Janssen <roel@gnu.org>
+;;; Copyright © 2017, 2018 Kei Kebreau <kkebreau@posteo.net>
+;;; Copyright © 2017 Rutger Helling <rhelling@mykolab.com>
+;;; Copyright © 2017 Muriithi Frederick Muriuki <fredmanglis@gmail.com>
+;;; Copyright © 2017 Brendan Tildesley <brendan.tildesley@openmailbox.org>
+;;; Copyright © 2018 Ethan R. Jones <ethanrjones97@gmail.com
+;;; Copyright © 2018 Fis Trivial <ybbs.daans@hotmail.com>
+;;; Copyright © 2018 Vijayalakshmi Vedantham <vijimay12@gmail.com>
+;;; Copyright © 2018 Mathieu Lirzin <mthl@gnu.org>
+;;; Copyright © 2018 Adam Massmann <massmannak@gmail.com>
+;;; Copyright © 2016, 2018 Tomáš Čech <sleep_walker@gnu.org>
+;;; Copyright © 2018 Nicolas Goaziou <mail@nicolasgoaziou.fr>
+;;; Copyright © 2018 Oleg Pykhalov <go.wigust@gmail.com>
+;;; Copyright © 2018 Clément Lassieur <clement@lassieur.org>
+;;; Copyright © 2018 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;; Copyright © 2018 Luther Thompson <lutheroto@gmail.com>
+;;; Copyright © 2018 Vagrant Cascadian <vagrant@debian.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages python-xyz)
+  #:use-module ((guix licenses) #:prefix license:)
+  #:use-module (gnu packages)
+  #:use-module (gnu packages algebra)
+  #:use-module (gnu packages adns)
+  #:use-module (gnu packages attr)
+  #:use-module (gnu packages backup)
+  #:use-module (gnu packages bash)
+  #:use-module (gnu packages check)
+  #:use-module (gnu packages compression)
+  #:use-module (gnu packages crypto)
+  #:use-module (gnu packages databases)
+  #:use-module (gnu packages file)
+  #:use-module (gnu packages fontutils)
+  #:use-module (gnu packages gcc)
+  #:use-module (gnu packages geo)
+  #:use-module (gnu packages ghostscript)
+  #:use-module (gnu packages gl)
+  #:use-module (gnu packages glib)
+  #:use-module (gnu packages graphviz)
+  #:use-module (gnu packages graphics)
+  #:use-module (gnu packages gstreamer)
+  #:use-module (gnu packages gtk)
+  #:use-module (gnu packages icu4c)
+  #:use-module (gnu packages image)
+  #:use-module (gnu packages imagemagick)
+  #:use-module (gnu packages libevent)
+  #:use-module (gnu packages libffi)
+  #:use-module (gnu packages linux)
+  #:use-module (gnu packages llvm)
+  #:use-module (gnu packages man)
+  #:use-module (gnu packages maths)
+  #:use-module (gnu packages multiprecision)
+  #:use-module (gnu packages networking)
+  #:use-module (gnu packages ncurses)
+  #:use-module (gnu packages openstack)
+  #:use-module (gnu packages pcre)
+  #:use-module (gnu packages perl)
+  #:use-module (gnu packages pkg-config)
+  #:use-module (gnu packages python)
+  #:use-module (gnu packages python-crypto)
+  #:use-module (gnu packages python-web)
+  #:use-module (gnu packages qt)
+  #:use-module (gnu packages readline)
+  #:use-module (gnu packages sdl)
+  #:use-module (gnu packages search)
+  #:use-module (gnu packages shells)
+  #:use-module (gnu packages ssh)
+  #:use-module (gnu packages terminals)
+  #:use-module (gnu packages tex)
+  #:use-module (gnu packages texinfo)
+  #:use-module (gnu packages time)
+  #:use-module (gnu packages tls)
+  #:use-module (gnu packages version-control)
+  #:use-module (gnu packages video)
+  #:use-module (gnu packages web)
+  #:use-module (gnu packages base)
+  #:use-module (gnu packages xml)
+  #:use-module (gnu packages xorg)
+  #:use-module (gnu packages xdisorg)
+  #:use-module (gnu packages tcl)
+  #:use-module (gnu packages bdw-gc)
+  #:use-module (guix packages)
+  #:use-module (guix download)
+  #:use-module (guix git-download)
+  #:use-module (guix utils)
+  #:use-module (guix build-system gnu)
+  #:use-module (guix build-system cmake)
+  #:use-module (guix build-system python)
+  #:use-module (guix build-system trivial)
+  #:use-module (srfi srfi-1)
+  #:use-module (srfi srfi-26))
+
+(define-public python-psutil
+  (package
+    (name "python-psutil")
+    (version "5.4.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "psutil" version))
+       (sha256
+        (base32
+         "063v69x7spyclyaxrd3gmzj3p16q5ayg97xqhwb1kyn22a9pwip2"))))
+    (build-system python-build-system)
+    (arguments
+     ;; FIXME: some tests does not return and times out.
+     '(#:tests? #f))
+    (home-page "https://www.github.com/giampaolo/psutil")
+    (synopsis "Library for retrieving information on running processes")
+    (description
+     "psutil (Python system and process utilities) is a library for retrieving
+information on running processes and system utilization (CPU, memory, disks,
+network) in Python.  It is useful mainly for system monitoring, profiling and
+limiting process resources and management of running processes.  It implements
+many functionalities offered by command line tools such as: ps, top, lsof,
+netstat, ifconfig, who, df, kill, free, nice, ionice, iostat, iotop, uptime,
+pidof, tty, taskset, pmap.")
+    (properties `((python2-variant . ,(delay python2-psutil))))
+    (license license:bsd-3)))
+
+(define-public python2-psutil
+  (let ((base (package-with-python2 (strip-python2-variant python-psutil))))
+    (package
+      (inherit base)
+      (propagated-inputs
+       `(("python2-enum34" ,python2-enum34)         ;optional
+         ,@(package-propagated-inputs base))))))
+
+(define-public python-shapely
+  (package
+    (name "python-shapely")
+    (version "1.6.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Shapely" version))
+       (sha256
+        (base32
+         "0svc58dzcw9gj92b4sgq35sdxkf85z0qwlzxarkzq4bp3h8jy58l"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-cython" ,python-cython)
+       ("python-matplotlib" ,python-matplotlib)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-cov" ,python-pytest-cov)))
+    (inputs
+     `(("geos" ,geos)))
+    (propagated-inputs
+     `(("python-numpy" ,python-numpy)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-geos-path
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((geos (assoc-ref inputs "geos"))
+                   (glibc (assoc-ref inputs ,(if (%current-target-system)
+                                                 "cross-libc" "libc"))))
+               (substitute* "shapely/geos.py"
+                 (("_lgeos = load_dll\\('geos_c', fallbacks=.*\\)")
+                  (string-append "_lgeos = load_dll('geos_c', fallbacks=['"
+                                 geos "/lib/libgeos_c.so'])"))
+                 (("free = load_dll\\('c'\\)\\.free")
+                  (string-append "free = load_dll('c', fallbacks=['"
+                                 glibc "/lib/libc.so.6']).free"))))
+             #t)))))
+    (home-page "https://github.com/Toblerity/Shapely")
+    (synopsis "Library for the manipulation and analysis of geometric objects")
+    (description "Shapely is a Python package for manipulation and analysis of
+planar geometric objects.  It is based on the @code{GEOS} library.")
+    (license license:bsd-3)))
+
+(define-public python-logwrap
+  (package
+    (name "python-logwrap")
+    (version "3.2.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "logwrap" version ".zip"))
+       (sha256
+        (base32
+         "1d2k0hvpbi51vl410y8fbs5m0nxnlh2k7gr2nrh3k81ibhzscsra"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-six" ,python-six)
+       ("python-typing" ,python-typing)))
+    (native-inputs
+     `(("unzip" ,unzip)
+       ("python-cython" ,python-cython)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-cov" ,python-pytest-cov)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://github.com/penguinolog/logwrap")
+    (synopsis "Decorator for logging function arguments")
+    (description "This package provides a decorator to log function arguments
+and function call return values in a human-readable way.")
+    (license license:asl2.0)))
+
+(define-public python2-shapely
+  (package-with-python2 python-shapely))
+
+(define-public python-clyent
+  (package
+    (name "python-clyent")
+    (version "1.2.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "clyent" version))
+       (sha256
+        (base32
+         "1r9987qmy1pz3hq54160bapqsywpq14waw4w9x3ly8hmq7kpgfbj"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-mock" ,python-mock)))
+    (home-page "https://github.com/binstar/clyent")
+    (synopsis "Command line client library")
+    (description "Clyent is a Python command line utiliy library.  It is used
+by @code{binstar}, @code{binstar-build} and @code{chalmers}.")
+    (license license:bsd-3)))
+
+(define-public python2-clyent
+  (package-with-python2 python-clyent))
+
+(define-public python-babel
+  (package
+    (name "python-babel")
+    (version "2.6.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "Babel" version))
+      (sha256
+       (base32
+        "08rxmbx2s4irp0w0gmn498vns5xy0fagm0fg33xa772jiks51flc"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-freezegun" ,python-freezegun)
+       ("python-pytest" ,python-pytest)))
+    (propagated-inputs
+     `(("python-pytz" ,python-pytz)))
+    (arguments
+     `(#:phases (modify-phases %standard-phases
+                  (replace 'check
+                    (lambda _ (invoke "pytest" "-vv"))))))
+    (home-page "http://babel.pocoo.org/")
+    (synopsis
+     "Tools for internationalizing Python applications")
+    (description
+     "Babel is composed of two major parts:
+- tools to build and work with gettext message catalogs
+- a Python interface to the CLDR (Common Locale Data Repository), providing
+access to various locale display names, localized number and date formatting,
+etc. ")
+    (license license:bsd-3)))
+
+(define-public python2-babel
+  (package-with-python2 python-babel))
+
+(define-public python2-backport-ssl-match-hostname
+  (package
+    (name "python2-backport-ssl-match-hostname")
+    (version "3.5.0.1")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (string-append
+            "https://pypi.python.org/packages/source/b/"
+            "backports.ssl_match_hostname/backports.ssl_match_hostname-"
+            version ".tar.gz"))
+      (sha256
+       (base32
+        "1wndipik52cyqy0677zdgp90i435pmvwd89cz98lm7ri0y3xjajh"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:tests? #f)) ; no test target
+    (home-page "https://bitbucket.org/brandon/backports.ssl_match_hostname")
+    (synopsis "Backport of ssl.match_hostname() function from Python 3.5")
+    (description
+     "This backport brings the ssl.match_hostname() function to users of
+earlier versions of Python.  The function checks the hostname in the
+certificate returned by the server to which a connection has been established,
+and verifies that it matches the intended target hostname.")
+    (license license:psfl)))
+
+(define-public python-hdf4
+  (package
+   (name "python-hdf4")
+   (version "0.9")
+   (source
+    (origin
+      (method url-fetch)
+      (uri (pypi-uri name version))
+      (sha256
+       (base32
+        "1hjiyrxvxk9817qyqky3nar4y3fs4z8wxz0n884zzb5wi6skrjks"))))
+   (build-system python-build-system)
+   (native-inputs `(("nose" ,python-nose)))
+   (propagated-inputs `(("numpy" ,python-numpy)))
+   (inputs
+    `(("hdf4" ,hdf4)
+      ("libjpeg" ,libjpeg)
+      ("zlib" ,zlib)))
+   (arguments
+    `(#:phases
+      (modify-phases %standard-phases
+        (replace 'check
+          (lambda _
+            ;; The 'runexamples' script sets PYTHONPATH to CWD, then goes
+            ;; on to import numpy. Somehow this works on their CI system.
+            ;; Let's just manage PYTHONPATH here instead.
+            (substitute* "runexamples.sh"
+              (("export PYTHONPATH=.*") ""))
+            (setenv "PYTHONPATH"
+                    (string-append (getcwd) ":"
+                                   (getenv "PYTHONPATH")))
+            (invoke "./runexamples.sh")
+            (invoke "nosetests" "-v"))))))
+   (home-page "https://github.com/fhs/python-hdf4")
+   (synopsis "Python interface to the NCSA HDF4 library")
+   (description
+    "Python-HDF4 is a python wrapper around the NCSA HDF version 4 library,
+which implements the SD (Scientific Dataset), VS (Vdata) and V (Vgroup) API’s.
+NetCDF files can also be read and modified.  Python-HDF4 is a fork of
+@url{http://hdfeos.org/software/pyhdf.php,pyhdf}.")
+   (license license:expat)))
+
+(define-public python2-hdf4
+  (package-with-python2 python-hdf4))
+
+(define-public python-h5py
+  (package
+    (name "python-h5py")
+    (version "2.8.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "h5py" version))
+      (sha256
+       (base32
+        "0mdr6wrq02ac93m1aqx9kad0ppfzmm4imlxqgyy1x4l7hmdcc9p6"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f ; no test target
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'fix-hdf5-paths
+          (lambda* (#:key inputs #:allow-other-keys)
+            (let ((prefix (assoc-ref inputs "hdf5")))
+              (substitute* "setup_build.py"
+                (("\\['/opt/local/lib', '/usr/local/lib'\\]")
+                 (string-append "['" prefix "/lib" "']"))
+                (("'/opt/local/include', '/usr/local/include'")
+                 (string-append "'" prefix "/include" "'")))
+              (substitute* "setup_configure.py"
+                (("\\['/usr/local/lib', '/opt/local/lib'\\]")
+                 (string-append "['" prefix "/lib" "']")))
+              #t))))))
+    (propagated-inputs
+     `(("python-six" ,python-six)
+       ("python-numpy" ,python-numpy)))
+    (inputs
+     `(("hdf5" ,hdf5)))
+    (native-inputs
+     `(("python-cython" ,python-cython)
+       ("python-pkgconfig" ,python-pkgconfig)))
+    (home-page "http://www.h5py.org/")
+    (synopsis "Read and write HDF5 files from Python")
+    (description
+     "The h5py package provides both a high- and low-level interface to the
+HDF5 library from Python.  The low-level interface is intended to be a
+complete wrapping of the HDF5 API, while the high-level component supports
+access to HDF5 files, datasets and groups using established Python and NumPy
+concepts.")
+    (license license:bsd-3)))
+
+(define-public python2-h5py
+  (package-with-python2 python-h5py))
+
+(define-public python-netcdf4
+  (package
+    (name "python-netcdf4")
+    (version "1.2.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "netCDF4" version))
+       (sha256
+        (base32
+         "1h6jq338amlbk0ilzvjyl7cck80i0bah9a5spn9in71vy2qxm7i5"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-cython" ,python-cython)))
+    (propagated-inputs
+     `(("python-numpy" ,python-numpy)))
+    (inputs
+     `(("netcdf" ,netcdf)
+       ("hdf4" ,hdf4)
+       ("hdf5" ,hdf5)))
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (setenv "NO_NET" "1") ; disable opendap tests
+             (with-directory-excursion "test"
+               (setenv "PYTHONPATH" ; find and add the library we just built
+                       (string-append
+                        (car (find-files "../build" "lib.*"
+                                         #:directories? #:t
+                                         #:fail-on-error? #:t))
+                        ":" (getenv "PYTHONPATH")))
+               (zero? (system* "python" "run_all.py"))))))))
+    (home-page
+     "https://github.com/Unidata/netcdf4-python")
+    (synopsis "Python/numpy interface to the netCDF library")
+    (description "Netcdf4-python is a Python interface to the netCDF C
+library.  netCDF version 4 has many features not found in earlier
+versions of the library and is implemented on top of HDF5.  This module
+can read and write files in both the new netCDF 4 and the old netCDF 3
+format, and can create files that are readable by HDF5 clients.  The
+API is modelled after @code{Scientific.IO.NetCDF}, and should be familiar
+to users of that module.")
+    ;; The software is mainly ISC, but includes some files covered
+    ;; by the Expat license.
+    (license (list license:isc license:expat))))
+
+(define-public python2-netcdf4
+  (package-with-python2 python-netcdf4))
+
+(define-public python-lockfile
+  (package
+    (name "python-lockfile")
+    (version "0.12.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://pypi.python.org/packages/source/l/lockfile/"
+                           "lockfile-" version ".tar.gz"))
+       (sha256
+        (base32
+         "16gpx5hm73ah5n1079ng0vy381hl802v606npkx4x8nb0gg05vba"))))
+    (build-system python-build-system)
+    (arguments '(#:test-target "check"))
+    (native-inputs
+     `(("python-pbr" ,python-pbr)))
+    (home-page "https://launchpad.net/pylockfile")
+    (synopsis "Platform-independent file locking module")
+    (description
+     "The lockfile package exports a LockFile class which provides a simple
+API for locking files.")
+    (license license:expat)))
+
+(define-public python2-lockfile
+  (package-with-python2 python-lockfile))
+
+(define-public python-semantic-version
+  (package
+    (name "python-semantic-version")
+    (version "2.6.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "semantic_version" version))
+       (sha256
+        (base32
+         "1h2l9xyg1zzsda6kjcmfcgycbvrafwci283vcr1v5sbk01l2hhra"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))                    ; PyPI tarball lacks tests
+    (home-page "https://github.com/rbarrois/python-semanticversion")
+    (synopsis "Semantic versioning module for Python")
+    (description
+     "The @code{semantic_version} class is a small library for handling
+@uref{https://semver.org/, semantic versioning} (@dfn{SemVer}) in Python.
+
+It can compare versions, generate a new version that represents a bump in one of
+the version levels, and check whether any given string is a proper semantic
+version identifier.")
+    (license license:bsd-3)))
+
+(define-public python2-semantic-version
+  (package-with-python2 python-semantic-version))
+
+(define-public python-serpent
+  (package
+    (name "python-serpent")
+    (version "1.27")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "serpent" version))
+       (sha256
+        (base32
+         "04p9dsrm5pv8vhk3flvih55kgvlzpi38hlaykdiakddmgwqw93bg"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/irmen/Serpent")
+    (synopsis "Serializer for literal Python expressions")
+    (description
+     "Serpent provides ast.literal_eval() compatible object tree
+serialization.  It serializes an object tree into bytes (utf-8 encoded string)
+that can be decoded and then passed as-is to ast.literal_eval() to rebuild it
+as the original object tree.  As such it is safe to send serpent data to other
+machines over the network for instance (because only safe literals are
+encoded).")
+    (license license:expat)))
+
+(define-public python-setuptools
+  (package
+    (name "python-setuptools")
+    (version "40.0.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "setuptools" version ".zip"))
+      (sha256
+       (base32
+        "0pq116lr14gnc62v76nk0npkm6krb2mpp7p9ab369zgv4n7dnah1"))
+      (modules '((guix build utils)))
+      (snippet
+       '(begin
+          ;; Remove included binaries which are used to build self-extracting
+          ;; installers for Windows.
+          ;; TODO: Find some way to build them ourself so we can include them.
+          (for-each delete-file (find-files "setuptools" "^(cli|gui).*\\.exe$"))
+          #t))))
+    (build-system python-build-system)
+    ;; FIXME: Tests require pytest, which itself relies on setuptools.
+    ;; One could bootstrap with an internal untested setuptools.
+    (arguments
+     `(#:tests? #f))
+    (home-page "https://pypi.python.org/pypi/setuptools")
+    (synopsis
+     "Library designed to facilitate packaging Python projects")
+    (description
+     "Setuptools is a fully-featured, stable library designed to facilitate
+packaging Python projects, where packaging includes:
+Python package and module definitions,
+distribution package metadata,
+test hooks,
+project installation,
+platform-specific details,
+Python 3 support.")
+    ;; TODO: setuptools now bundles the following libraries:
+    ;; packaging, pyparsing, six and appdirs. How to unbundle?
+    (license (list license:psfl        ; setuptools itself
+                   license:expat       ; six, appdirs, pyparsing
+                   license:asl2.0      ; packaging is dual ASL2/BSD-2
+                   license:bsd-2))))
+
+(define-public python2-setuptools
+  (package-with-python2 python-setuptools))
+
+(define-public python-uniseg
+  (package
+    (name "python-uniseg")
+    (version "0.7.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "uniseg" version ".zip"))
+       (sha256
+        (base32
+         "05jsazvz6nbmh6l3v1rph5ydkqn1hzx1pyggdyvgp2qgmgrnmiz2"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; The test suite requires network access.
+    (native-inputs
+     `(("unzip" ,unzip)))
+    (home-page
+     "https://bitbucket.org/emptypage/uniseg-python")
+    (synopsis
+     "Python library to determine Unicode text segmentations")
+    (description
+     "Uniseg is a Python package used to determine Unicode text segmentations.
+Supported segmentations include:
+@enumerate
+@item @dfn{Code point} (any value in the Unicode codespace)
+@item @dfn{Grapheme cluster} (user-perceived character made of a single or
+multiple Unicode code points, e.g. \"G\" + acute-accent)
+@item Word break
+@item Sentence break
+@item Line break
+@end enumerate")
+    (license license:expat)))
+
+(define-public python2-uniseg
+  (package-with-python2 python-uniseg))
+
+(define-public python-humanfriendly
+  (package
+    (name "python-humanfriendly")
+    (version "4.4.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "humanfriendly" version))
+       (sha256
+        (base32
+         "0pisgizjql86785jchfjv217g0lsgk114g2lja5j4y3lsc3b9szi"))))
+    (build-system python-build-system)
+    (arguments
+     `(;; XXX: Tests depend on coloredlogs, which in turn depends on humanfriendly.
+       #:tests? #f))
+    (propagated-inputs
+     `(("python-monotonic" ,python-monotonic)))
+    (home-page "https://humanfriendly.readthedocs.io")
+    (synopsis "Human-friendly input and output in Python")
+    (description
+     "The functions and classes in @code{humanfriendly} can be used to make
+text interfaces more user-friendly.  It includes tools to parse and format
+numbers, file sizes, and timespans, timers for long-running operations, menus
+to allow the user to choose from a list of options, and terminal interaction
+helpers.")
+    (license license:expat)))
+
+(define-public python2-humanfriendly
+  (package-with-python2 python-humanfriendly))
+
+(define-public python-capturer
+  (package
+    (name "python-capturer")
+    (version "2.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "capturer" version))
+       (sha256
+        (base32
+         "05d6ji4j8ipiq0br7bwam38qc6hd9l1djmfxlzrxx19ziyjl4089"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))
+    (propagated-inputs
+     `(("python-humanfriendly" ,python-humanfriendly)))
+    (home-page "https://capturer.readthedocs.io")
+    (synopsis "Capture stdout and stderr streams of the current process")
+    (description
+     "The capturer package makes it easy to capture the stdout and stderr
+streams of the current process and subprocesses.  Output can be relayed
+to the terminal in real time but is also available to the Python program
+for additional processing.")
+    (license license:expat)))
+
+(define-public python2-capturer
+  (package-with-python2 python-capturer))
+
+(define-public python-case
+  (package
+    (name "python-case")
+    (version "1.5.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "case" version))
+       (sha256
+        (base32
+         "1cagg06vfph864s6l5jb0zqliwxh647bki8j6lf4a4qrv40jnhs8"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-mock" ,python-mock)
+       ("python-nose" ,python-nose)
+       ("python-six" ,python-six)
+       ("python-unittest2" ,python-unittest2)))
+    (native-inputs
+     `(("python-coverage" ,python-coverage)))
+    (home-page "https://github.com/celery/case")
+    (synopsis "Unittest utilities and convenience methods")
+    (description
+     "The @code{case} package provides utilities on top of unittest, including
+some helpful Python 2 compatibility convenience methods.")
+    (license license:bsd-3)))
+
+(define-public python-verboselogs
+  (package
+    (name "python-verboselogs")
+    (version "1.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "verboselogs" version))
+       (sha256
+        (base32
+         "09z4d1jiasn7k1hs5af2ckmnrd0i1d1m04bhfjhv7z6svzfdwgg3"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-astroid" ,python-astroid)
+       ("python-pylint" ,python-pylint)))
+    (home-page "https://verboselogs.readthedocs.io")
+    (synopsis "Verbose logging level for Python's logging module")
+    (description
+     "The @code{verboselogs} package extends Python's @code{logging} module to
+add the log levels NOTICE, SPAM, SUCCESS and VERBOSE.")
+    (license license:expat)))
+
+(define-public python2-verboselogs
+  (package-with-python2 python-verboselogs))
+
+(define-public python-coloredlogs
+  (package
+    (name "python-coloredlogs")
+    (version "7.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "coloredlogs" version))
+       (sha256
+        (base32
+         "1blcann6dyg5dhps9pg12rn0q0rjrlajpmmil0gy0j4cbvnl2il9"))))
+    (build-system python-build-system)
+    (arguments
+     `(;Tests require some updated modules
+       #:tests? #f))
+    (propagated-inputs
+     `(("python-capturer" ,python-capturer)))
+    (home-page "https://coloredlogs.readthedocs.io")
+    (synopsis "Colored stream handler for Python's logging module")
+    (description
+     "The @code{coloredlogs} package enables colored terminal output for
+Python's logging module.  The @code{ColoredFormatter} class inherits from
+@code{logging.Formatter} and uses ANSI escape sequences to render your logging
+messages in color.")
+    (license license:expat)))
+
+(define-public python2-coloredlogs
+  (package-with-python2 python-coloredlogs))
+
+(define-public python-eventlet
+  (package
+    (name "python-eventlet")
+    (version "0.20.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "eventlet" version))
+       (sha256
+        (base32
+         "0f3q55mq4n021wb7qa53pz3ix6i2py64sap66vsaqm2scjw83m9s"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-greenlet" ,python-greenlet)))
+    (arguments
+     ;; TODO: Requires unpackaged 'enum-compat'.
+     '(#:tests? #f))
+    (home-page "http://eventlet.net")
+    (synopsis "Concurrent networking library for Python")
+    (description
+     "Eventlet is a concurrent networking library for Python that
+allows you to change how you run your code, not how you write it.
+It uses @code{epoll} or @code{libevent} for highly scalable non-blocking I/O.
+Coroutines ensure that the developer uses a blocking style of programming
+that is similar to threading, but provide the benefits of non-blocking I/O.
+The event dispatch is implicit, which means you can easily use @code{Eventlet}
+from the Python interpreter, or as a small part of a larger application.")
+  (license license:expat)))
+
+(define-public python2-eventlet
+  (let ((base (package-with-python2
+                (strip-python2-variant python-eventlet))))
+    (package (inherit base)
+      (propagated-inputs
+       `(("python2-enum34" ,python2-enum34)
+         ,@(package-propagated-inputs base))))))
+
+(define-public python-six
+  (package
+    (name "python-six")
+    (version "1.11.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "six" version))
+      (sha256
+       (base32
+        "1scqzwc51c875z23phj48gircqjgnn3af8zy2izjwmnlxrxsgs3h"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (invoke "py.test" "-v"))))))
+    (native-inputs
+     `(("python-py" ,python-py)
+       ("python-pytest" ,python-pytest-bootstrap)))
+    (home-page "https://pypi.python.org/pypi/six/")
+    (synopsis "Python 2 and 3 compatibility utilities")
+    (description
+     "Six is a Python 2 and 3 compatibility library.  It provides utility
+functions for smoothing over the differences between the Python versions with
+the goal of writing Python code that is compatible on both Python versions.
+Six supports every Python version since 2.5.  It is contained in only one
+Python file, so it can be easily copied into your project.")
+    (license license:x11)))
+
+(define-public python2-six
+  (package-with-python2 python-six))
+
+(define-public python-six-bootstrap
+  (package
+    (inherit python-six)
+    (name "python-six-bootstrap")
+    (native-inputs `())
+    (arguments `(#:tests? #f))))
+
+(define-public python2-six-bootstrap
+  (package-with-python2 python-six-bootstrap))
+
+(define-public python-schedule
+  (package
+    (name "python-schedule")
+    (version "0.4.3")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "schedule" version))
+      (sha256
+       (base32
+        "0vplyjcbfrq50sphlwya749z8p2pcyi2nycw3518i0qpd9a6189i"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-mock" ,python-mock)))
+    (home-page "https://github.com/dbader/schedule")
+    (synopsis "Schedule periodic function calls in Python")
+    (description
+     "Schedule is an in-process scheduler for periodic jobs that uses the
+builder pattern for configuration.  Schedule lets you run Python functions (or
+any other callable) periodically at pre-determined intervals using a simple,
+human-friendly syntax.")
+    (license license:expat)))
+
+(define-public python2-schedule
+  (package-with-python2 python-schedule))
+
+(define-public python-pandas
+  (package
+    (name "python-pandas")
+    (version "0.23.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pandas" version))
+       (sha256
+        (base32 "1x54pd7hr3y7qahx6b5bf2wzj54xvl8r3s1h4pl254pnmi3wl92v"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:modules ((guix build utils)
+                  (guix build python-build-system)
+                  (ice-9 ftw)
+                  (srfi srfi-26))
+       #:phases (modify-phases %standard-phases
+                  (replace 'check
+                    (lambda _
+                      (let ((build-directory
+                             (string-append
+                              (getcwd) "/build/"
+                              (car (scandir "build"
+                                            (cut string-prefix? "lib." <>))))))
+                        ;; Disable the "strict data files" option which causes
+                        ;; the build to error out if required data files are not
+                        ;; available (as is the case with PyPI archives).
+                        (substitute* "setup.cfg"
+                          (("addopts = --strict-data-files") "addopts = "))
+                        (with-directory-excursion build-directory
+                          ;; Delete tests that require "moto" which is not yet in Guix.
+                          (for-each delete-file
+                                    '("pandas/tests/io/conftest.py"
+                                      "pandas/tests/io/json/test_compression.py"
+                                      "pandas/tests/io/parser/test_network.py"
+                                      "pandas/tests/io/test_excel.py"
+                                      "pandas/tests/io/test_parquet.py"))
+                          (invoke "pytest" "-vv" "pandas" "--skip-slow"
+                                  "--skip-network" "-k"
+                                  ;; XXX: Due to the deleted tests above.
+                                  "not test_read_s3_jsonl"))))))))
+    (propagated-inputs
+     `(("python-numpy" ,python-numpy)
+       ("python-pytz" ,python-pytz)
+       ("python-dateutil" ,python-dateutil)))
+    (native-inputs
+     `(("python-cython" ,python-cython)
+       ("python-beautifulsoup4" ,python-beautifulsoup4)
+       ("python-lxml" ,python-lxml)
+       ("python-html5lib" ,python-html5lib)
+       ("python-nose" ,python-nose)
+       ("python-pytest" ,python-pytest)))
+    (home-page "https://pandas.pydata.org")
+    (synopsis "Data structures for data analysis, time series, and statistics")
+    (description
+     "Pandas is a Python package providing fast, flexible, and expressive data
+structures designed to make working with structured (tabular,
+multidimensional, potentially heterogeneous) and time series data both easy
+and intuitive.  It aims to be the fundamental high-level building block for
+doing practical, real world data analysis in Python.")
+    (license license:bsd-3)))
+
+(define-public python2-pandas
+  (package-with-python2 python-pandas))
+
+(define-public python2-mechanize
+  (package
+    (name "python2-mechanize")
+    (version "0.2.5")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (string-append "https://pypi.python.org/packages/source/m/mechanize/mechanize-"
+                          version ".tar.gz"))
+      (sha256
+       (base32
+        "0rj7r166i1dyrq0ihm5rijfmvhs8a04im28lv05c0c3v206v4rrf"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2 ; apparently incompatible with Python 3
+       #:tests? #f))
+         ;; test fails with message
+         ;; AttributeError: 'module' object has no attribute 'test_pullparser'
+         ;; (python-3.3.2) or
+         ;; AttributeError: 'module' object has no attribute 'test_urllib2_localnet'
+         ;; (python-2.7.5).
+         ;; The source code is from March 2011 and probably not up-to-date
+         ;; with respect to python unit tests.
+    (home-page "http://wwwsearch.sourceforge.net/mechanize/")
+    (synopsis
+     "Stateful programmatic web browsing in Python")
+    (description
+     "Mechanize implements stateful programmatic web browsing in Python,
+after Andy Lester’s Perl module WWW::Mechanize.")
+    (license (license:non-copyleft
+              "file://COPYING"
+              "See COPYING in the distribution."))))
+
+
+(define-public python-simplejson
+  (package
+    (name "python-simplejson")
+    (version "3.14.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "simplejson" version))
+      (sha256
+       (base32
+        "1lkv3xlf7ryzi69zqfdbkvpxdfy1rg1rq2yzcnxgf4km5m6difqy"))))
+    (build-system python-build-system)
+    (home-page "http://simplejson.readthedocs.org/en/latest/")
+    (synopsis
+     "Json library for Python")
+    (description
+     "JSON (JavaScript Object Notation) is a subset of JavaScript
+syntax (ECMA-262 3rd edition) used as a lightweight data interchange
+format.
+
+Simplejson exposes an API familiar to users of the standard library marshal
+and pickle modules.  It is the externally maintained version of the json
+library contained in Python 2.6, but maintains compatibility with Python 2.5
+and (currently) has significant performance advantages, even without using
+the optional C extension for speedups.  Simplejson is also supported on
+Python 3.3+.")
+    (license license:x11)))
+
+(define-public python2-simplejson
+  (package-with-python2 python-simplejson))
+
+
+(define-public python-pyicu
+  (package
+    (name "python-pyicu")
+    (version "2.2")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "PyICU" version))
+      (sha256
+       (base32
+        "0wq9y5fi1ighgf5aws9nr87vi1w44p7q1k83rx2y3qj5d2xyhspa"))))
+    (build-system python-build-system)
+    (inputs
+     `(("icu4c" ,icu4c)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-six" ,python-six)))
+    (home-page "https://github.com/ovalhub/pyicu")
+    (synopsis "Python extension wrapping the ICU C++ API")
+    (description
+     "PyICU is a python extension wrapping the ICU C++ API.")
+    (properties `((python2-variant . ,(delay python2-pyicu))))
+    (license license:x11)))
+
+(define-public python2-pyicu
+  (let ((base (package-with-python2
+                (strip-python2-variant python-pyicu))))
+    (package
+      (inherit base)
+      (arguments
+       `(,@(package-arguments base)
+         #:phases
+         (modify-phases %standard-phases
+           (add-before 'check 'delete-failing-test
+             (λ _
+               ;; XXX: This fails due to Unicode issues unique to Python 2,
+               ;; it seems: <https://github.com/ovalhub/pyicu/issues/61>.
+               (delete-file "test/test_Script.py")
+               #t))))))))
+
+(define-public python2-dogtail
+  ;; Python 2 only, as it leads to "TabError: inconsistent use of tabs and
+  ;; spaces in indentation" with Python 3.
+  (package
+    (name "python2-dogtail")
+    (version "0.9.9")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "dogtail" version))
+             (sha256
+              (base32
+               "0p5wfssvzr9w0bvhllzbbd8fnp4cca2qxcpcsc33dchrmh5n552x"))))
+    (build-system python-build-system)
+    (arguments `(#:python ,python-2
+                 #:tests? #f))                    ; invalid command "test"
+    ;; Currently no offical homepage.
+    (home-page "https://pypi.python.org/pypi/dogtail/")
+    (synopsis "GUI test tool and automation framework written in Python")
+    (description
+     "Dogtail is a GUI test tool and automation framework written in Python.
+It uses Accessibility (a11y) technologies to communicate with desktop
+applications. dogtail scripts are written in Python and executed like any
+other Python program.")
+    (license license:gpl2+)))
+
+(define-public python-empy
+  (package
+    (name "python-empy")
+    (version "3.3")
+    (source (origin
+             (method url-fetch)
+             (uri (string-append "http://www.alcyone.com/software/empy/empy-"
+                                 version ".tar.gz"))
+             (sha256
+              (base32
+               "01g8mmkfnvjdmlhsihwyx56lrg7r5m5d2fg6mnxsvy6g0dnl69f6"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))                    ;python2 only
+    (home-page "http://www.alcyone.com/software/empy/")
+    (synopsis "Templating system for Python")
+    (description
+     "EmPy is a system for embedding Python expressions and statements in
+template text; it takes an EmPy source file, processes it, and produces
+output.  This is accomplished via expansions, which are special signals to the
+EmPy system and are set off by a special prefix (by default the at sign, @@).
+EmPy can expand arbitrary Python expressions and statements in this way, as
+well as a variety of special forms.  Textual data not explicitly delimited in
+this way is sent unaffected to the output, allowing Python to be used in
+effect as a markup language.  Also supported are callbacks via hooks,
+recording and playback via diversions, and dynamic, chainable filters.  The
+system is highly configurable via command line options and embedded
+commands.")
+    (license license:lgpl2.1+)))
+
+(define-public python2-empy
+  (package-with-python2 python-empy))
+
+(define-public python2-element-tree
+  (package
+    (name "python2-element-tree")
+    (version "1.2.6")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "http://effbot.org/media/downloads/elementtree-"
+                    version "-20050316.tar.gz"))
+              (sha256
+               (base32
+                "016bphqnlg0l4vslahhw4r0aanw95bpypy65r1i1acyb2wj5z7dj"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2                       ; seems to be part of Python 3
+       #:tests? #f))                            ; no 'test' sub-command
+    (synopsis "Toolkit for XML processing in Python")
+    (description
+     "ElementTree is a Python library supporting lightweight XML processing.")
+    (home-page "http://effbot.org/zone/element-index.htm")
+    (license (license:x11-style
+              "http://docs.python.org/2/license.html"
+              "Like \"CWI LICENSE AGREEMENT FOR PYTHON 0.9.0 THROUGH 1.2\"."))))
+
+(define-public python2-pybugz
+  (package
+    (name "python2-pybugz")
+    (version "0.6.11")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "http://bits.liquidx.net/projects/pybugz/pybugz-"
+                    version ".tar.gz"))
+              (sha256
+               (base32
+                "17ni00p08gp5lkxlrrcnvi3x09fmajnlbz4da03qcgl9q21ym4jd"))
+              (patches (search-patches "pybugz-stty.patch"
+                                       "pybugz-encode-error.patch"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2                         ; SyntaxError with Python 3
+       #:tests? #f))                              ; no 'test' sub-command
+    (propagated-inputs
+     `(("element-tree" ,python2-element-tree)))
+    (synopsis "Python and command-line interface to Bugzilla")
+    (description
+     "PyBugz is a Python library and command-line tool to query the Bugzilla
+bug tracking system.  It is meant as an aid to speed up interaction with the
+bug tracker.")
+    (home-page "http://www.liquidx.net/pybugz/")
+    (license license:gpl2)))
+
+(define-public python2-enum
+  (package
+    (name "python2-enum")
+    (version "0.4.6")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "enum" version))
+              (sha256
+               (base32
+                "13lk3yrwj42vl30kw3c194f739nrfrdg64s6i0v2p636n4k8brsl"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2))
+    (home-page "http://pypi.python.org/pypi/enum/")
+    (synopsis "Robust enumerated type support in Python")
+    (description
+     "This provides a module for robust enumerations in Python.  It has
+been superseded by the Python standard library and is provided only for
+compatibility.")
+    ;; Choice of either license.
+    (license (list license:gpl3+ license:psfl))))
+
+(define-public python-enum34
+  (package
+    (name "python-enum34")
+    (version "1.1.6")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "enum34" version))
+      (sha256
+       (base32
+        "1cgm5ng2gcfrkrm3hc22brl6chdmv67b9zvva9sfs7gn7dwc9n4a"))))
+    (build-system python-build-system)
+    (home-page "https://pypi.python.org/pypi/enum34")
+    (synopsis "Backported Python 3.4 Enum")
+    (description
+     "Enum34 is the new Python stdlib enum module available in Python 3.4
+backported for previous versions of Python from 2.4 to 3.3.")
+    (license license:bsd-3)))
+
+(define-public python2-enum34
+  (package-with-python2 python-enum34))
+
+(define-public python-parse-type
+  (package
+    (name "python-parse-type")
+    (version "0.4.2")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "parse_type" version))
+      (sha256
+       (base32
+        "0g3b6gsdwnm8dpkh2vn34q6dzxm9gl908ggyzcv31n9xbp3vv5pm"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-six" ,python-six)
+       ("python-parse" ,python-parse)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://github.com/jenisys/parse_type")
+    (synopsis "Extended parse module")
+    (description
+     "Parse_type extends the python parse module.")
+    (properties
+     `((python2-variant . ,(delay python2-parse-type))))
+    (license license:bsd-3)))
+
+(define-public python2-parse-type
+  (let ((base (package-with-python2
+                (strip-python2-variant python-parse-type))))
+    (package (inherit base)
+      (propagated-inputs
+       `(("python2-enum34" ,python2-enum34)
+         ,@(package-propagated-inputs base))))))
+
+(define-public python-parse
+  (package
+    (name "python-parse")
+    (version "1.8.4")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "parse" version))
+      (sha256
+       (base32
+        "0f8997xr8nq2nq35iiviq8ningd1zvy59fg503xfpbi2dwhgdkf3"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _ (invoke "python" "test_parse.py"))))))
+    (home-page "https://github.com/r1chardj0n3s/parse")
+    (synopsis "Parse strings")
+    (description
+     "Parse strings using a specification based on the Python @code{format()}
+syntax.")
+    (license license:x11)))
+
+(define-public python-polib
+  (package
+    (name "python-polib")
+    (version "1.0.8")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "polib" version))
+               (sha256
+                (base32
+                  "1pq2hbm3m2q0cjdszk8mc4qa1vl3wcblh5nfyirlfnzb2pcy7zss"))))
+    (build-system python-build-system)
+    (home-page "https://bitbucket.org/izi/polib/wiki/Home")
+    (synopsis "Manipulate, create and modify gettext files")
+    (description "Polib can manipulate any gettext format (po, pot and mo)
+files.  It can be used to create po files from scratch or to modify
+existing ones.")
+    (license license:expat)))
+
+(define-public python2-polib
+  (let ((base (package-with-python2 (strip-python2-variant python-polib))))
+    (package
+      (inherit base)
+      (arguments `(,@(package-arguments base)
+                   ;; Tests don't work with python2.
+                   #:tests? #f)))))
+
+(define-public scons
+  (package
+    (name "scons")
+    (version "3.0.1")
+    (source (origin
+             (method url-fetch)
+             (uri (string-append "mirror://sourceforge/scons/scons/" version
+                                 "/scons-" version ".tar.gz"))
+             (sha256
+              (base32
+               "0wzid419mlwqw9llrg8gsx4nkzhqy16m4m40r0xnh6cwscw5wir4"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:use-setuptools? #f                ; still relies on distutils
+       #:tests? #f))                       ; no 'python setup.py test' command
+    (home-page "http://scons.org/")
+    (synopsis "Software construction tool written in Python")
+    (description
+     "SCons is a software construction tool.  Think of SCons as an improved,
+cross-platform substitute for the classic Make utility with integrated
+functionality similar to autoconf/automake and compiler caches such as ccache.
+In short, SCons is an easier, more reliable and faster way to build
+software.")
+    (license license:x11)))
+
+(define-public scons-python2
+  (package
+    (inherit (package-with-python2 scons))
+    (name "scons-python2")))
+
+(define-public python-extras
+  (package
+    (name "python-extras")
+    (version "1.0.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "extras" version))
+       (sha256
+        (base32
+         "0khvm08rcwm62wc47j8niyl6h13f8w51c8669ifivjdr23g3cbhk"))))
+    (build-system python-build-system)
+    (arguments
+     ;; FIXME: Circular dependency on testtools.
+     '(#:tests? #f))
+    (home-page "https://github.com/testing-cabal/extras")
+    (synopsis "Useful extensions to the Python standard library")
+    (description
+     "Extras is a set of extensions to the Python standard library.")
+    (license license:expat)))
+
+(define-public python2-extras
+  (package-with-python2 python-extras))
+
+(define-public python-mimeparse
+  (package
+    (name "python-mimeparse")
+    (version "1.6.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://pypi.python.org/packages/source/p/python-mimeparse/python-mimeparse-"
+             version ".tar.gz"))
+       (sha256
+        (base32
+         "0y2g6cl660bpz11srgqyvvm8gmywpgyx8g0xfvbiyr0af0yv1r3n"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (invoke "./mimeparse_test.py"))))))
+    (home-page
+     "https://github.com/dbtsai/python-mimeparse")
+    (synopsis "Python library for parsing MIME types")
+    (description
+     "Mimeparse provides basic functions for parsing MIME type names and
+matching them against a list of media-ranges.")
+    (license license:expat)))
+
+(define-public python2-mimeparse
+  (package-with-python2 python-mimeparse))
+
+(define-public python-miniboa
+  (package
+    (name "python-miniboa")
+    (version "1.0.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "miniboa" version))
+       (sha256
+        (base32
+         "09jh3pn4rh7kh7jayanf8jzy6gp03791b5a193w6148cf3i6k9m3"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/shmup/miniboa")
+    (synopsis "Simple, single-threaded Telnet server")
+    (description
+     "Miniboa is a simple, asynchronous, single-threaded, poll-based Telnet
+server.")
+    (license license:asl2.0)))
+
+(define-public python2-miniboa
+  (package-with-python2 python-miniboa))
+
+(define-public python-pafy
+  (package
+    (name "python-pafy")
+    (version "0.5.3.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pafy" version))
+       (sha256
+        (base32
+         "1a7dxi95m1043rxx1r5x3ngb66nwlq6aqcasyqqjzmmmjps4zrim"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f)) ; Currently pafy can not find itself in the tests
+    (propagated-inputs
+     ;; Youtube-dl is a python package which is imported in the file
+     ;; "backend_youtube_dl.py", therefore it needs to be propagated.
+     `(("youtube-dl" ,youtube-dl)))
+    (home-page "https://np1.github.io/pafy/")
+    (synopsis "Retrieve YouTube content and metadata")
+    (description
+     "@code{pafy} is a python library to retrieve YouTube content and metadata.")
+    (license license:lgpl3+)))
+
+(define-public python2-funcsigs
+  (package
+    (name "python2-funcsigs")
+    (version "1.0.2")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "funcsigs" version))
+              (sha256
+               (base32
+                "0l4g5818ffyfmfs1a924811azhjj8ax9xd1cffr1mzd3ycn0zfx7"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2))
+    (native-inputs
+     `(("python2-unittest2" ,python2-unittest2)))
+    (home-page "http://funcsigs.readthedocs.org")
+    (synopsis "Python function signatures from PEP362")
+    (description
+     "Backport of @code{funcsigs} which was introduced in Python 3.3.")
+    (license license:asl2.0)))
+
+(define-public python2-funcsigs-bootstrap
+  (package
+    (inherit python2-funcsigs)
+    (name "python2-funcsigs-bootstrap")
+    (native-inputs `())
+    (arguments
+     `(#:tests? #f
+       ,@(package-arguments python2-funcsigs)))))
+
+(define-public python-py
+  (package
+    (name "python-py")
+    (version "1.5.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "py" version))
+       (sha256
+        (base32
+         "1xxvwfn82457djf55f5n2c94699rfqnk43br8fif2r2q8gvrmm9z"))))
+    (build-system python-build-system)
+    (arguments
+     ;; FIXME: "ImportError: 'test' module incorrectly imported from
+     ;; '/gnu/store/...-python-pytest-mimimal-3.0.5/lib/python3.5/site-packages'.
+     ;; Expected '/tmp/guix-build-python-py-1.4.31.drv-0/py-1.4.31/py'.
+     ;; Is this module globally installed?"
+     '(#:tests? #f))
+    (native-inputs
+     `(("python-setuptools-scm" ,python-setuptools-scm)))
+    (home-page "https://github.com/pytest-dev/py")
+    (synopsis "Python library for parsing, I/O, instrospection, and logging")
+    (description
+     "Py is a Python library for file name parsing, .ini file parsing, I/O,
+code introspection, and logging.")
+    (license license:expat)))
+
+(define-public python2-py
+  (package-with-python2 python-py))
+
+;; Recent versions of python-fixtures and python-testrepository need
+;; python-pbr for packaging, which itself needs these two packages for
+;; testing.
+;; To fix this circular dependency, we use a build of python-pbr, based on the
+;; same source, just without any test dependencies and with tests disabled.
+;; python-pbr-minmal is then used to package python-fixtures and
+;; python-testrepository.
+;; Strictly speaking we currently could remove the test-requirements from the
+;; normal python-pbr package (and save this package) since test are disabled
+;; there anyway. But this may change in future.
+(define-public python-pbr-minimal
+  (package
+    (name "python-pbr-minimal")
+    (version "3.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pbr" version))
+       (sha256
+        (base32
+         "14fs5acnalnb3h62s7q7av239j541fk0n0z0lawh4h09b1s93s6p"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))
+    (home-page "http://docs.openstack.org/developer/pbr/")
+    (synopsis "Minimal build of python-pbr used for bootstrapping")
+    (description
+     "Used only for bootstrapping python2-pbr, you should not need this.")
+    (license license:asl2.0)))
+
+(define-public python2-pbr-minimal
+  (package-with-python2 python-pbr-minimal))
+
+(define-public python-pbr
+  (package
+    (inherit python-pbr-minimal)
+    (name "python-pbr")
+    (arguments
+     `(#:tests? #f)) ;; Most tests seem to use the Internet.
+    (propagated-inputs
+      `(("git" ,git))) ;; pbr actually uses the "git" binary.
+    (native-inputs
+      `(("python-fixtures" ,python-fixtures-bootstrap)
+        ;; discover, coverage, hacking, subunit
+        ("python-mock" ,python-mock)
+        ("python-six" ,python-six)
+        ("python-sphinx" ,python-sphinx)
+        ("python-testrepository" ,python-testrepository-bootstrap)
+        ("python-testresources" ,python-testresources-bootstrap)
+        ("python-testscenarios" ,python-testscenarios-bootstrap)
+        ("python-testtools" ,python-testtools-bootstrap)
+        ("python-virtualenv" ,python-virtualenv)))
+    (synopsis "Enhance the default behavior of Python’s setuptools")
+    (description
+      "Python Build Reasonableness (PBR) is a library that injects some useful
+and sensible default behaviors into your setuptools run.  It will set
+versions, process requirements files and generate AUTHORS and ChangeLog file
+from git information.
+")))
+
+(define-public python2-pbr
+  (package-with-python2 python-pbr))
+
+(define-public python-exif-read
+  (package
+    (name "python-exif-read")
+    (version "2.1.2")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "ExifRead" version))
+              (sha256
+               (base32
+                "1b90jf6m9vxh9nanhpyvqdq7hmfx5iggw1l8kq10jrs6xgr49qkr"))))
+    (build-system python-build-system)
+    (arguments `(#:tests? #f)) ; no tests
+    (home-page "https://github.com/ianare/exif-py")
+    (synopsis "Python library to extract EXIF data from image files")
+    (description
+     "ExifRead is a Python library to extract EXIF data from tiff and jpeg
+files.")
+    (license license:bsd-3)))
+
+(define-public python2-exif-read
+  (package-with-python2 python-exif-read))
+
+(define-public python-pyld
+  (package
+    (name "python-pyld")
+    (version "1.0.3")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "PyLD" version))
+              (sha256
+               (base32
+                "12i2g6xdj30k7xxcibg3sc5y76snwq8l6n8fy9lyi577kgy0h2pm"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/digitalbazaar/pyld")
+    (synopsis "Python implementation of the JSON-LD specification")
+    (description
+     "PyLD is an implementation of the JSON-LD specification.")
+    (license license:bsd-3)))
+
+(define-public python2-pyld
+  (package-with-python2 python-pyld))
+
+(define-public python-click
+  (package
+    (name "python-click")
+    (version "6.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "click" version))
+       (sha256
+        (base32
+         "02qkfpykbq35id8glfgwc38yc430427yd05z1wc5cnld8zgicmgi"))))
+    (build-system python-build-system)
+    (arguments
+     `(;; The tests are fragile, depending on a specific version of pytest:
+       ;; <https://github.com/pallets/click/issues/823>
+       #:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'fix-paths
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((glibc (assoc-ref inputs ,(if (%current-target-system)
+                                                 "cross-libc" "libc"))))
+               (substitute* "click/_unicodefun.py"
+                 (("'locale'")
+                  (string-append "'" glibc "/bin/locale'"))))
+             #t)))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "http://click.pocoo.org")
+    (synopsis "Command line library for Python")
+    (description
+     "Click is a Python package for creating command line interfaces in a
+composable way with as little code as necessary.  Its name stands for
+\"Command Line Interface Creation Kit\".  It's highly configurable but comes
+with sensible defaults out of the box.")
+    (license license:bsd-3)))
+
+(define-public python2-click
+  (package-with-python2 python-click))
+
+(define-public python-wheel
+  (package
+    (name "python-wheel")
+    (version "0.30.0a0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "wheel" version))
+        (sha256
+         (base32
+          "1nm6mn8isny0hr86rhbfrpfj867c0phf001xgsd69xfp9ady1wwq"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-jsonschema" ,python-jsonschema)
+       ("python-pytest-cov" ,python-pytest-cov)))
+    (home-page "https://bitbucket.org/pypa/wheel/")
+    (synopsis "Format for built Python packages")
+    (description
+     "A wheel is a ZIP-format archive with a specially formatted filename and
+the @code{.whl} extension.  It is designed to contain all the files for a PEP
+376 compatible install in a way that is very close to the on-disk format.  Many
+packages will be properly installed with only the @code{Unpack} step and the
+unpacked archive preserves enough information to @code{Spread} (copy data and
+scripts to their final locations) at any later time.  Wheel files can be
+installed with a newer @code{pip} or with wheel's own command line utility.")
+    (license license:expat)
+    (properties `((python2-variant . ,(delay python2-wheel))))))
+
+(define-public python2-wheel
+  (let ((wheel (package-with-python2
+                (strip-python2-variant python-wheel))))
+    (package (inherit wheel)
+      (native-inputs `(("python2-functools32" ,python2-functools32)
+                        ,@(package-native-inputs wheel))))))
+
+(define-public python-vcversioner
+  (package
+    (name "python-vcversioner")
+    (version "2.16.0.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "vcversioner" version))
+       (sha256
+        (base32
+         "16z10sm78jd7ca3jbkgc3q5i8a8q7y1h21q1li21yy3rlhbhrrns"))))
+    (build-system python-build-system)
+    (synopsis "Python library for version number discovery")
+    (description "Vcversioner is a Python library that inspects tagging
+information in a variety of version control systems in order to discover
+version numbers.")
+    (home-page "https://github.com/habnabit/vcversioner")
+    (license license:isc)))
+
+(define-public python2-vcversioner
+  (package-with-python2 python-vcversioner))
+
+(define-public python-jsonschema
+  (package
+    (name "python-jsonschema")
+    (version "2.6.0")
+    (source (origin
+             (method url-fetch)
+             (uri
+              (string-append
+               "https://pypi.python.org/packages/source/j/jsonschema/jsonschema-"
+               version ".tar.gz"))
+             (sha256
+              (base32
+               "00kf3zmpp9ya4sydffpifn0j0mzm342a2vzh82p6r0vh10cg7xbg"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check (lambda _ (zero? (system* "nosetests")))))))
+    (native-inputs
+     `(("python-nose" ,python-nose)
+       ("python-vcversioner" ,python-vcversioner)))
+    (home-page "https://github.com/Julian/jsonschema")
+    (synopsis "Implementation of JSON Schema for Python")
+    (description
+     "Jsonschema is an implementation of JSON Schema for Python.")
+    (license license:expat)
+    (properties `((python2-variant . ,(delay python2-jsonschema))))))
+
+(define-public python2-jsonschema
+  (let ((jsonschema (package-with-python2
+                     (strip-python2-variant python-jsonschema))))
+    (package (inherit jsonschema)
+             (native-inputs
+              `(("python2-mock" ,python2-mock)
+                ,@(package-native-inputs jsonschema)))
+             (propagated-inputs
+              `(("python2-functools32" ,python2-functools32))))))
+
+(define-public python-schema
+  (package
+    (name "python-schema")
+    (version "0.6.6")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "schema" version))
+       (sha256
+        (base32
+         "1lw28j9w9vxyigg7vkfkvi6ic9lgjkdnfvnxdr7pklslqvzmk2vm"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "https://github.com/keleshev/schema")
+    (synopsis "Simple data validation library")
+    (description
+     "@code{python-schema} is a library for validating Python data
+structures, such as those obtained from config-files, forms, external
+services or command-line parsing, converted from JSON/YAML (or
+something else) to Python data-types.")
+    (license license:psfl)))
+
+(define-public python2-schema
+  (package-with-python2 python-schema))
+
+(define-public python-schema-0.5
+  (package (inherit python-schema)
+    (version "0.5.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "schema" version))
+       (sha256
+        (base32
+         "10zqvpaky51kgb8nd42bk7jwl8cn2zvayxjpdc1wwmpybj92x67s"))))))
+
+(define-public python2-schema-0.5
+  (package-with-python2 python-schema-0.5))
+
+(define-public python-kitchen
+  (package
+    (name "python-kitchen")
+    (version "1.2.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "kitchen" version))
+       (sha256
+        (base32
+         "1zakh6l0yjvwic9p0nkvmbidpnkygkxbigh2skmb5gccyrhbp7xg"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-chardet" ,python-chardet)))
+    (home-page "https://github.com/fedora-infra/kitchen")
+    (synopsis "Python API for snippets")
+    (description "@code{kitchen} module provides a python API for all sorts of
+little useful snippets of code that everybody ends up writing for their projects
+but never seem big enough to build an independent release.  Use kitchen and stop
+cutting and pasting that code over and over.")
+    (license (list license:lgpl2.1+
+                   ;; subprocess.py, test_subprocess.py,
+                   ;; kitchen/pycompat25/defaultdict.py:
+                   license:psfl))))
+
+(define-public python2-kitchen
+  (package-with-python2 python-kitchen))
+
+(define-public python-unidecode
+  (package
+    (name "python-unidecode")
+    (version "1.0.23")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "Unidecode" version))
+             (sha256
+              (base32
+               "1ysjbr3nqfqj97h8zyj3v9pya413vkv7a1mzml80w37xx15kb1cb"))))
+    (build-system python-build-system)
+    (home-page "https://pypi.python.org/pypi/Unidecode")
+    (synopsis "ASCII transliterations of Unicode text")
+    (description
+     "Unidecode provides ASCII transliterations of Unicode text.  Unidecode is
+useful when integrating with legacy code that doesn't support Unicode, or for
+ease of entry of non-Roman names on a US keyboard, or when constructing ASCII
+machine identifiers from human-readable Unicode strings that should still be
+somewhat intelligible.")
+    (license license:gpl2+)))
+
+(define-public python2-unidecode
+  (package-with-python2 python-unidecode))
+
+(define-public python-pyjwt
+  (package
+    (name "python-pyjwt")
+    (version "1.5.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "PyJWT" version))
+       (sha256
+        (base32
+         "1rxsg14i33vm2i6lz0my628108c81k43v10n4h3p0gx62xdyf2sh"))
+       (modules '((guix build utils)))
+       (snippet
+        '(begin
+           (for-each delete-file-recursively
+                     (find-files "." "\\.pyc$"))
+           #t))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-pytest-cov" ,python-pytest-cov)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://github.com/progrium/pyjwt")
+    (synopsis "JSON Web Token implementation in Python")
+    (description
+     "PyJWT is a JSON Web Token implementation written in Python.")
+    (license license:expat)))
+
+(define-public python2-pyjwt
+  (package-with-python2 python-pyjwt))
+
+(define-public python-pykka
+  (package
+    (name "python-pykka")
+    (version "1.2.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Pykka" version))
+       (sha256
+        (base32
+         "049w3r0mdnnw7xv19jiq7rvls9k7xs73x05b4qs5d6z4vvmgyiz8"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-nose" ,python-nose)
+       ("python-gevent" ,python-gevent)
+       ("python-eventlet" ,python-eventlet)))
+    (home-page "https://www.pykka.org/")
+    (synopsis "Pykka is a Python implementation of the actor model")
+    (description
+     "Pykka is a Python implementation of the actor model.
+The actor model introduces some simple rules to control the sharing
+of state and cooperation between execution units, which makes it
+easier to build concurrent applications.")
+    (license license:asl2.0)))
+
+(define-public python2-pykka
+  (package-with-python2 python-pykka))
+
+(define-public python-pympler
+  (package
+    (name "python-pympler")
+    (home-page "https://pythonhosted.org/Pympler/")
+    (version "0.5")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "Pympler" version))
+              (sha256
+               (base32
+                "03qwsbilqgvnbl3a1jmpgixbr2kq6m3fvdlzyr3wdp01bwlc85kx"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases (modify-phases %standard-phases
+                  (delete 'check)
+                  (add-after 'install 'check
+                    (lambda* (#:key inputs outputs #:allow-other-keys)
+                      (add-installed-pythonpath inputs outputs)
+                      (invoke "python" "setup.py" "test"))))))
+    (synopsis "Measure, monitor and analyze memory behavior")
+    (description
+     "Pympler is a development tool to measure, monitor and analyze
+the memory behavior of Python objects in a running Python application.
+
+By pympling a Python application, detailed insight in the size and the
+lifetime of Python objects can be obtained.  Undesirable or unexpected
+runtime behavior like memory bloat and other @samp{pymples} can easily
+be identified.
+
+A web profiling frontend exposes process statistics, garbage
+visualisation and class tracker statistics.")
+    (license license:asl2.0)))
+
+(define-public python2-pympler
+  (package-with-python2 python-pympler))
+
+(define-public python-itsdangerous
+  (package
+    (name "python-itsdangerous")
+    (version "0.24")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://pypi.python.org/packages/source/i/itsdangerous/itsdangerous-"
+             version ".tar.gz"))
+       (sha256
+        (base32
+         "06856q6x675ly542ig0plbqcyab6ksfzijlyf1hzhgg3sgwgrcyb"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/mitsuhiko/itsdangerous")
+    (synopsis "Python library for passing data to/from untrusted environments")
+    (description
+     "Itsdangerous provides various helpers to pass trusted data to untrusted
+environments and back.")
+    (license license:bsd-3)))
+
+(define-public python2-itsdangerous
+  (package-with-python2 python-itsdangerous))
+
+(define-public python-pyyaml
+  (package
+    (name "python-pyyaml")
+    (version "3.13")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "PyYAML" version))
+       (sha256
+        (base32
+         "1gx603g484z46cb74j9rzr6sjlh2vndxayicvlyhxdz98lhhkwry"))))
+    (build-system python-build-system)
+    (inputs
+     `(("libyaml" ,libyaml)))
+    (home-page "http://pyyaml.org/wiki/PyYAML")
+    (synopsis "YAML parser and emitter for Python")
+    (description
+     "PyYAML is a YAML parser and emitter for Python.  PyYAML features a
+complete YAML 1.1 parser, Unicode support, pickle support, capable extension
+API, and sensible error messages.  PyYAML supports standard YAML tags and
+provides Python-specific tags that allow to represent an arbitrary Python
+object.")
+    (license license:expat)))
+
+(define-public python2-pyyaml
+  (package-with-python2 python-pyyaml))
+
+(define-public python-vine
+  (package
+    (name "python-vine")
+    (version "1.1.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "vine" version))
+       (sha256
+        (base32
+         "0wkskb2hb494v9gixqnf4bl972p4ibcmxdykzpwjlfa5picns4aj"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-case" ,python-case)))
+    (home-page "https://github.com/celery/vine")
+    (synopsis "Promises for Python")
+    (description
+     "@code{vine} provides a special implementation of promises in that it can
+be used both for \"promise of a value\" and lazy evaluation.  The biggest
+upside for this is that everything in a promise can also be a promise,
+e.g. filters, callbacks and errbacks can all be promises.")
+    (license license:bsd-3)))
+
+(define-public python-virtualenv
+  (package
+    (name "python-virtualenv")
+    (version "15.0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "virtualenv" version))
+       (sha256
+        (base32
+         "07cbajzk8l05k5zhlw0b9wbf2is65bl9v6zrn2a0iyn57w6pd73d"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             ;; Disable failing test.  See upstream bug report
+             ;; https://github.com/pypa/virtualenv/issues/957
+             (substitute* "tests/test_virtualenv.py"
+               (("skipif.*") "skipif(True, reason=\"Guix\")\n"))
+             (zero? (system* "py.test")))))))
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-pytest" ,python-pytest)))
+    (home-page "https://virtualenv.pypa.io/")
+    (synopsis "Virtual Python environment builder")
+    (description
+     "Virtualenv is a tool to create isolated Python environments.")
+    (license license:expat)))
+
+(define-public python2-virtualenv
+  (package-with-python2 python-virtualenv))
+
+(define-public python-markupsafe
+  (package
+    (name "python-markupsafe")
+    (version "1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://pypi.python.org/packages/source/M/MarkupSafe/MarkupSafe-"
+             version ".tar.gz"))
+       (sha256
+        (base32
+         "0rdn1s8x9ni7ss8rfiacj7x1085lx8mh2zdwqslnw8xc3l4nkgm6"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/mitsuhiko/markupsafe")
+    (synopsis "XML/HTML/XHTML markup safe string implementation for Python")
+    (description
+     "Markupsafe provides an XML/HTML/XHTML markup safe string implementation
+for Python.")
+    (license license:bsd-3)))
+
+(define-public python2-markupsafe
+  (package-with-python2 python-markupsafe))
+
+(define-public python-jinja2
+  (package
+    (name "python-jinja2")
+    (version "2.10")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Jinja2" version))
+       (sha256
+        (base32
+         "190l36hfw3wb2n3n68yacjabxyb1pnxwn7vjx96cmjj002xy2jzq"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-markupsafe" ,python-markupsafe)))
+    (home-page "http://jinja.pocoo.org/")
+    (synopsis "Python template engine")
+    (description
+     "Jinja2 is a small but fast and easy to use stand-alone template engine
+written in pure Python.")
+    (license license:bsd-3)))
+
+(define-public python2-jinja2
+  (package-with-python2 python-jinja2))
+
+(define-public python-pystache
+  (package
+    (name "python-pystache")
+    (version "0.5.4")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "pystache" version))
+              (sha256
+               (base32
+                "0nmqsfmiw4arjxqkmf9z66ml950pcdjk6aq4gin4sywmzdjw5fzp"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; FIXME: Python 3 tests are failing.
+    (home-page "http://defunkt.io/pystache/")
+    (synopsis "Python logic-less template engine")
+    (description
+     "Pystache is a Python implementation of the framework agnostic,
+logic-free templating system Mustache.")
+    (license license:expat)
+    (properties `((python2-variant . ,(delay python2-pystache))))))
+
+(define-public python2-pystache
+  (package (inherit (package-with-python2
+                     (strip-python2-variant python-pystache)))
+           (arguments
+            `(#:python ,python-2
+              #:phases
+              (modify-phases %standard-phases
+                (replace 'check
+                  (lambda _
+                    (zero? (system* "python" "test_pystache.py")))))))))
+
+(define-public python-joblib
+  (package
+    (name "python-joblib")
+    (version "0.13.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "joblib" version))
+              (sha256
+               (base32
+                "0612nazad8dxmn3xghfrmjax6456l4xy6hn9cngs7vydi14ds7v5"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _ (invoke "pytest" "-v" "joblib"))))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "https://joblib.readthedocs.io/")
+    (synopsis "Using Python functions as pipeline jobs")
+    (description
+     "Joblib is a set of tools to provide lightweight pipelining in Python.
+In particular, joblib offers: transparent disk-caching of the output values
+and lazy re-evaluation (memoize pattern), easy simple parallel computing
+logging and tracing of the execution.")
+    (license license:bsd-3)))
+
+(define-public python2-joblib
+  (package-with-python2 python-joblib))
+
+(define-public python-docutils
+  (package
+    (name "python-docutils")
+    (version "0.14")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "docutils" version))
+       (sha256
+        (base32
+         "0x22fs3pdmr42kvz6c654756wja305qv6cx1zbhwlagvxgr4xrji"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; no setup.py test command
+    (home-page "http://docutils.sourceforge.net/")
+    (synopsis "Python Documentation Utilities")
+    (description
+     "Docutils is a modular system for processing documentation into useful
+formats, such as HTML, XML, and LaTeX.  For input Docutils supports
+reStructuredText.")
+    ;; Most of the source code is public domain, but some source files are
+    ;; licensed under the PFSL, BSD 2-clause, and GPLv3+ licenses.
+    (license (list license:public-domain license:psfl license:bsd-2 license:gpl3+))))
+
+(define-public python2-docutils
+  (package-with-python2 python-docutils))
+
+(define-public python-pygments
+  (package
+    (name "python-pygments")
+    (version "2.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Pygments" version))
+       (sha256
+        (base32
+         "1k78qdvir1yb1c634nkv6rbga8wv4289xarghmsbbvzhvr311bnv"))))
+    (build-system python-build-system)
+    (arguments
+     ;; FIXME: Tests require sphinx, which depends on this.
+     '(#:tests? #f))
+    (home-page "http://pygments.org/")
+    (synopsis "Syntax highlighting")
+    (description
+     "Pygments is a syntax highlighting package written in Python.")
+    (license license:bsd-2)))
+
+(define-public python2-pygments
+  (package-with-python2 python-pygments))
+
+(define-public python-sphinxcontrib-websupport
+  (package
+    (name "python-sphinxcontrib-websupport")
+    (version "1.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "sphinxcontrib-websupport" version))
+              (sha256
+               (base32
+                "1ff3ix76xi1y6m99qxhaq5161ix9swwzydilvdya07mgbcvpzr4x"))))
+    (build-system python-build-system)
+    (arguments
+     ;; FIXME: Tests depend on Sphinx, which depends on this.
+     `(#:tests? #f))
+    (home-page "http://sphinx-doc.org/")
+    (synopsis "Sphinx API for web applications")
+    (description "This package provides a Python API to easily integrate
+Sphinx documentation into your web application.  It provides tools to
+integrate Sphinx documents in web templates and to handle searches.")
+    (license license:bsd-3)))
+
+(define-public python2-sphinxcontrib-websupport
+  (package-with-python2 python-sphinxcontrib-websupport))
+
+(define-public python-sphinx
+  (package
+    (name "python-sphinx")
+    (version "1.7.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Sphinx" version))
+       (sha256
+        (base32
+         "0pkkbfj7cl157q550gcs45am5y78ps0h7q6455d64s1zmw01jlvi"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             ;; Requires Internet access.
+             (delete-file "tests/test_build_linkcheck.py")
+             (substitute* "tests/test_build_latex.py"
+               (("@pytest.mark.sphinx\\('latex', testroot='images'\\)")
+                "@pytest.mark.skip()"))
+             (when (which "python")
+               ;; XXX: These tests are broken when using Python2:
+               ;; <https://github.com/sphinx-doc/sphinx/issues/4710>.
+               (delete-file "tests/test_api_translator.py")
+               (delete-file "tests/test_setup_command.py"))
+             (invoke "make" "test"))))))
+    (propagated-inputs
+     `(("python-imagesize" ,python-imagesize)
+       ("python-sphinx-alabaster-theme"
+        ,python-sphinx-alabaster-theme)
+       ("python-babel" ,python-babel)
+       ("python-snowballstemmer" ,python-snowballstemmer)
+       ("python-docutils" ,python-docutils)
+       ("python-jinja2" ,python-jinja2)
+       ("python-packaging" ,python-packaging)
+       ("python-pygments" ,python-pygments)
+       ("python-requests" ,python-requests)
+       ("python-six" ,python-six)
+       ("python-sphinxcontrib-websupport" ,python-sphinxcontrib-websupport)))
+    (native-inputs
+     `(("graphviz" ,graphviz)
+       ("imagemagick" ,imagemagick)                    ;for "convert"
+       ("python-html5lib" ,python-html5lib)
+       ("python-mock" ,python-mock)
+       ("python-nose" ,python-nose)
+       ("python-pytest" ,python-pytest)))
+    (home-page "http://sphinx-doc.org/")
+    (synopsis "Python documentation generator")
+    (description "Sphinx is a tool that makes it easy to create documentation
+for Python projects or other documents consisting of multiple reStructuredText
+sources.")
+    (license license:bsd-3)
+    (properties `((python2-variant . ,(delay python2-sphinx))))))
+
+(define-public python2-sphinx
+  (let ((base (package-with-python2 (strip-python2-variant python-sphinx))))
+    (package
+      (inherit base)
+      (native-inputs `(("python2-mock" ,python2-mock)
+                       ("python2-enum34" ,python2-enum34)
+                       ,@(package-native-inputs base)))
+      (propagated-inputs `(("python2-pytz" ,python2-pytz)
+                           ("python2-typing" ,python2-typing)
+                       ,@(package-propagated-inputs base))))))
+
+(define-public python-sphinx-gallery
+  (package
+    (name "python-sphinx-gallery")
+    (version "0.1.13")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://github.com/sphinx-gallery/sphinx-gallery"
+                                  "/archive/v" version ".tar.gz"))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "03fs99mcb1r7qp0xixqv07vcz98sk21yq19ffdysi0infdcpzfkd"))))
+    (build-system python-build-system)
+    (arguments
+     ;; FIXME: Tests attempt to download <https://docs.python.org/3/objects.inv>,
+     ;; <https://docs.scipy.org/doc/numpy/objects.inv>, and
+     ;; <https://matplotlib.org/objects.inv>.
+     `(#:tests? #f))
+    (native-inputs
+     `(("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://sphinx-gallery.github.io/")
+    (synopsis "Generate an examples gallery automatically")
+    (description
+     "@code{sphinx_gallery} is a Sphinx extension that builds an HTML version
+from any set of Python scripts and puts it into an examples gallery.")
+    (license license:bsd-3)))
+
+(define-public python2-sphinx-gallery
+  (package-with-python2 python-sphinx-gallery))
+
+(define-public python-sphinx-rtd-theme
+  (package
+    (name "python-sphinx-rtd-theme")
+    (version "0.2.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "sphinx_rtd_theme" version))
+       (sha256
+        (base32
+         "05rlhjzdyapr2w74jjs7mrm8hi69qskcr5vya9f9drpsys7lpxrd"))))
+    (build-system python-build-system)
+    (arguments '(#:tests? #f)) ; No tests.
+    (propagated-inputs
+     `(("python-sphinx" ,python-sphinx)))
+    (home-page "https://github.com/snide/sphinx_rtd_theme/")
+    (synopsis "ReadTheDocs.org theme for Sphinx")
+    (description "A theme for Sphinx used by ReadTheDocs.org.")
+    (license license:expat)))
+
+(define-public python2-sphinx-rtd-theme
+  (package-with-python2 python-sphinx-rtd-theme))
+
+(define-public python-guzzle-sphinx-theme
+  (package
+    (name "python-guzzle-sphinx-theme")
+    (version "0.7.11")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "guzzle_sphinx_theme" version))
+        (sha256
+         (base32
+          "1rnkzrrsbnifn3vsb4pfaia3nlvgvw6ndpxp7lzjrh23qcwid34v"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-sphinx" ,python-sphinx)))
+    (home-page "https://github.com/guzzle/guzzle_sphinx_theme")
+    (synopsis "Sphinx theme used by Guzzle")
+    (description "This package provides guzzle_sphinx_theme, a theme for the
+Sphinx documentation system, used by @uref{http://docs.guzzlephp.org, Guzzle}
+and several other projects.")
+    (license license:expat)))
+
+(define-public python2-guzzle-sphinx-theme
+  (package-with-python2 python-guzzle-sphinx-theme))
+
+(define-public python-rst.linker
+  (package
+    (name "python-rst.linker")
+    (version "1.10")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "rst.linker" version))
+       (sha256
+        (base32
+         "0iqaacp7pj1s8avs4kc0qg0r7dscywaq37y6l9j14glqdikk0wdj"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-dateutil" ,python-dateutil)
+       ("python-six" ,python-six)))
+    (native-inputs
+     `(("python-setuptools-scm" ,python-setuptools-scm)))
+    ;; Test would require path.py, which would introduce a cyclic dependence.
+    (arguments `(#:tests? #f))
+    ;; Note: As of version 1.7 the documentation is not worth building.
+    (home-page "https://github.com/jaraco/rst.linker")
+    (synopsis "Sphinx plugin to add links and timestamps")
+    (description "rst.linker allows to automatically replace text by a
+reStructuredText external reference or timestamps.  It's primary purpose is to
+augment the changelog, but it can be used for other documents, too.")
+    (license license:expat)))
+
+(define-public python2-rst.linker
+  (package-with-python2 python-rst.linker))
+
+(define-public python-feedgenerator
+  (package
+    (name "python-feedgenerator")
+    (version "1.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "feedgenerator" version))
+       (sha256
+        (base32
+         "01mirwkm7xfx539hmvj7g9da1j51gw5lsx74dr0glizskjm5vq2s"))
+       (modules '((guix build utils)))
+       (snippet
+        '(begin
+           ;; Remove pre-compiled .pyc files from source.
+           (for-each delete-file-recursively
+                     (find-files "." "__pycache__" #:directories? #t))
+           (for-each delete-file (find-files "." "\\.pyc$"))
+           #t))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-pytz" ,python-pytz)
+       ("python-six" ,python-six)))
+    (home-page "https://github.com/getpelican/feedgenerator")
+    (synopsis
+     "Standalone version of Django's Atom/RSS feed generator")
+    (description
+     "Feedgenerator-py3k is a standalone version of Django's feedgenerator,
+which can produce feeds in RSS 2.0, RSS 0.91, and Atom formats.")
+    (license license:bsd-3)))
+
+(define-public python2-feedgenerator
+  (package-with-python2 python-feedgenerator))
+
+(define-public python-toml
+  (package
+    (name "python-toml")
+    (version "0.9.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "toml" version))
+       (sha256
+        (base32
+         "0bdbpbip67wdm6c7xwc6mmbmskyradj4cdxn1iibj4fcx1nbv1lf"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))                     ;no tests suite in release
+    (home-page "https://github.com/uiri/toml")
+    (synopsis "Library for TOML")
+    (description
+     "@code{toml} is a library for parsing and creating Tom's Obvious, Minimal
+Language (TOML) configuration files.")
+    (license license:expat)))
+
+(define-public python-black
+  (package
+    (name "python-black")
+    (version "18.6b4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "black" version))
+       (sha256
+        (base32
+         "0i4sfqgz6w15vd50kbhi7g7rifgqlf8yfr8y78rypd56q64qn592"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'patch-source-shebangs 'patch-extra-shebangs
+           (lambda _
+             (let ((python3 (which "python3")))
+               (substitute* '("tests/data/fmtonoff.py"
+                              "tests/data/string_prefixes.py"
+                              "tests/data/function.py")
+                 (("#!/usr/bin/env python3(\\.[0-9]+)?" _ minor-version)
+                  (string-append "#!" python3 (if (string? minor-version)
+                                                  minor-version
+                                                  ""))))))))))
+    (propagated-inputs
+     `(("python-click" ,python-click)
+       ("python-attrs" ,python-attrs)
+       ("python-appdirs" ,python-appdirs)
+       ("python-toml" ,python-toml)))
+    (home-page "https://github.com/ambv/black")
+    (synopsis "The uncompromising code formatter")
+    (description "Black is the uncompromising Python code formatter.")
+    (license license:expat)))
+
+(define-public python-blinker
+  (package
+    (name "python-blinker")
+    (version "1.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "blinker" version))
+       (sha256
+        (base32
+         "1dpq0vb01p36jjwbhhd08ylvrnyvcc82yxx3mwjx6awrycjyw6j7"))))
+    (build-system python-build-system)
+    (home-page "http://pythonhosted.org/blinker/")
+    (synopsis "Fast, simple object-to-object and broadcast signaling")
+    (description
+     "Blinker provides a fast dispatching system that allows any number of
+interested parties to subscribe to events, or \"signals\".")
+    (license license:expat)))
+
+(define-public python2-blinker
+  (package-with-python2 python-blinker))
+
+(define-public pelican
+  (package
+    (name "pelican")
+    (version "3.7.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pelican" version))
+       (sha256
+        (base32
+         "12spygavv9b6xpb5pgp7f0p3z0mms60nx6zrpx1yfkj68zz4flra"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-feedgenerator" ,python-feedgenerator)
+       ("python-jinja2" ,python-jinja2)
+       ("python-pygments" ,python-pygments)
+       ("python-docutils" ,python-docutils)
+       ("python-pytz" ,python-pytz)
+       ("python-blinker" ,python-blinker)
+       ("python-unidecode" ,python-unidecode)
+       ("python-six" ,python-six)
+       ("python-dateutil" ,python-dateutil)
+       ("python-markdown" ,python-markdown)))
+    (home-page "https://getpelican.com/")
+    (arguments
+     `(;; XXX Requires a lot more packages to do unit tests :P
+       #:tests? #f
+       #:phases (modify-phases %standard-phases
+                  (add-before
+                   'install 'adjust-requires
+                   ;; Since feedgenerator is installed from git, it doesn't
+                   ;; conform to the version requirements.
+                   ;;
+                   ;; We *do have* "feedgenerator >= 1.6", but strip off the
+                   ;; version requirement so setuptools doesn't get confused.
+                   (lambda _
+                     (substitute* "setup.py"
+                       (("['\"]feedgenerator.*?['\"]")
+                        "'feedgenerator'")))))))
+    (synopsis "Python-based static site publishing system")
+    (description
+     "Pelican is a tool to generate a static blog from reStructuredText,
+Markdown input files, and more.  Pelican uses Jinja2 for templating
+and is very extensible.")
+    (license license:agpl3+)))
+
+(define-public python-scikit-image
+  (package
+    (name "python-scikit-image")
+    (version "0.14.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "scikit-image" version))
+       (sha256
+        (base32 "0l1c3rl4s1jyv80i5hns4pgih09zrxfj7lygdc51w8sgyysb7ac6"))))
+    (build-system python-build-system)
+    (arguments
+     ;; TODO: Some tests require running X11 server. Disable them?
+     '(#:tests? #f))
+    ;; See DEPENDS.txt for the list of build and run time requiremnts
+    (propagated-inputs
+     `(("python-cloudpickle" ,python-cloudpickle)
+       ("python-dask" ,python-dask)
+       ("python-matplotlib" ,python-matplotlib)
+       ("python-networkx" ,python-networkx)
+       ("python-numpy" ,python-numpy)
+       ("python-pillow" ,python-pillow)
+       ("python-pywavelets" ,python-pywavelets)
+       ("python-scipy" ,python-scipy)
+       ("python-six" ,python-six)))
+    (native-inputs
+     `(("python-cython" ,python-cython)))
+    (home-page "http://scikit-image.org/")
+    (synopsis "Image processing in Python")
+    (description
+     "Scikit-image is a collection of algorithms for image processing.")
+    (license license:bsd-3)))
+
+(define-public python2-scikit-image
+  (package-with-python2 python-scikit-image))
+
+(define-public python-cython
+  (package
+    (name "python-cython")
+    (version "0.28.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Cython" version))
+       (sha256
+        (base32
+         "0imw9s2rbrh32clbl10csnwmig9p3nzkrd2baxxxfmnrsc42pb3n"))))
+    (build-system python-build-system)
+    ;; we need the full python package and not just the python-wrapper
+    ;; because we need libpython3.3m.so
+    (inputs
+     `(("python" ,python)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'set-HOME
+           ;; some tests require access to "$HOME/.cython"
+           (lambda _ (setenv "HOME" "/tmp") #t))
+
+         ;; FIXME: These tests started failing on armhf after the 0.28 update
+         ;; (commit c69d11c5930), both with an error such as this:
+         ;;  compiling (cpp) and running dictcomp ...
+         ;;  === C/C++ compiler error output: ===
+         ;;  ‘
+         ;;  dictcomp.cpp:5221: confused by earlier errors, bailing out
+         ;; See <https://hydra.gnu.org/build/2948724> for logs.
+         ,@(if (target-arm32?)
+               `((add-before 'check 'disable-failing-tests
+                  (lambda _
+                    (let ((disabled-tests (open-file "tests/bugs.txt" "a")))
+                      (for-each (lambda (test)
+                                  (format disabled-tests "~a\n" test))
+                                '("memslice" "dictcomp"))
+                      (close-port disabled-tests)))))
+               '())
+
+         (replace 'check
+           (lambda _
+             ;; The "with_outer_raising" test fails with Python 3.7.  See
+             ;; https://github.com/cython/cython/issues/2454
+             (delete-file "tests/run/generators_py.py")
+             (invoke "python" "runtests.py" "-vv"))))))
+    (home-page "http://cython.org/")
+    (synopsis "C extensions for Python")
+    (description "Cython is an optimising static compiler for both the Python
+programming language and the extended Cython programming language.  It makes
+writing C extensions for Python as easy as Python itself.")
+    (license license:asl2.0)
+    (properties `((python2-variant . ,(delay python2-cython))))))
+
+(define-public python2-cython
+  (package (inherit (package-with-python2
+                     (strip-python2-variant python-cython)))
+    (name "python2-cython")
+    (inputs
+     `(("python-2" ,python-2))))) ; this is not automatically changed
+
+;; The RPython toolchain currently does not support Python 3.
+(define-public python2-rpython
+  (package
+    (name "python2-rpython")
+    (version "0.2.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "rpython" version))
+       (sha256
+        (base32
+         "02z9cvxf0y41dcvwnvf2zn0albhhw1drvjjbq27m6i1piw1k6fc0"))))
+    (build-system python-build-system)
+    (arguments `(#:python ,python-2))
+    (native-inputs
+     `(("python2-pytest" ,python2-pytest))) ; needed for running tests
+    (home-page "https://rpython.readthedocs.org")
+    (synopsis "Framework for implementing interpreters and virtual machines")
+    (description "RPython is a translation and support framework for
+producing implementations of dynamic languages, emphasizing a clean separation
+between language specification and implementation aspects.")
+    (license license:expat)))
+
+;; NOTE: when upgrading numpy please make sure that python-pandas and
+;; python-scipy still build, as these three packages are often used together.
+(define-public python-numpy
+  (package
+    (name "python-numpy")
+    (version "1.15.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://github.com/numpy/numpy/releases/download/v"
+             version "/numpy-" version ".tar.gz"))
+       (sha256
+        (base32
+         "102vcl2qq4pjbm7a3d67vkkvn4466ngia1d8wi5avqwqh8j0jvkn"))))
+    (build-system python-build-system)
+    (inputs
+     `(("openblas" ,openblas)
+       ("lapack" ,lapack)))
+    (native-inputs
+     `(("python-cython" ,python-cython)
+       ("python-pytest" ,python-pytest)
+       ("gfortran" ,gfortran)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'configure-blas-lapack
+           (lambda* (#:key inputs #:allow-other-keys)
+             (call-with-output-file "site.cfg"
+               (lambda (port)
+                 (format port
+                         "[openblas]
+libraries = openblas
+library_dirs = ~a/lib
+include_dirs = ~a/include
+
+# backslash-n to make emacs happy
+\n[lapack]
+lapack_libs = lapack
+library_dirs = ~a/lib
+include_dirs = ~a/include
+"
+                         (assoc-ref inputs "openblas")
+                         (assoc-ref inputs "openblas")
+                         (assoc-ref inputs "lapack")
+                         (assoc-ref inputs "lapack"))))
+             #t))
+         (add-before 'build 'fix-executable-paths
+           (lambda* (#:key inputs #:allow-other-keys)
+             ;; Make /gnu/store/...-bash-.../bin/sh the default shell,
+             ;; instead of /bin/sh.
+             (substitute* "numpy/distutils/exec_command.py"
+               (("(os.environ.get\\('SHELL', ')(/bin/sh'\\))" match match-start match-end)
+                (string-append match-start (assoc-ref inputs "bash") match-end)))
+             ;; Use "gcc" executable, not "cc".
+             (substitute* "numpy/distutils/system_info.py"
+               (("c = distutils\\.ccompiler\\.new_compiler\\(\\)")
+                "c = distutils.ccompiler.new_compiler(); c.set_executables(compiler='gcc',compiler_so='gcc',linker_exe='gcc',linker_so='gcc -shared')"))
+             #t))
+         ;; Tests can only be run after the library has been installed and not
+         ;; within the source directory.
+         (delete 'check)
+         (add-after 'install 'check
+           (lambda* (#:key outputs inputs #:allow-other-keys)
+             ;; Make installed package available for running the tests
+             (add-installed-pythonpath inputs outputs)
+             ;; Make sure "f2py" etc is found.
+             (setenv "PATH" (string-append (assoc-ref outputs "out") "/bin"
+                                           ":" (getenv "PATH")))
+             (with-directory-excursion "/tmp"
+               (invoke "python" "-c"
+                       "import numpy; numpy.test(verbose=2)")))))))
+    (home-page "http://www.numpy.org/")
+    (synopsis "Fundamental package for scientific computing with Python")
+    (description "NumPy is the fundamental package for scientific computing
+with Python.  It contains among other things: a powerful N-dimensional array
+object, sophisticated (broadcasting) functions, tools for integrating C/C++
+and Fortran code, useful linear algebra, Fourier transform, and random number
+capabilities.")
+    (license license:bsd-3)))
+
+(define-public python2-numpy
+  (package-with-python2 python-numpy))
+
+;; NOTE: NumPy 1.8 is packaged only for Python 2 because it is of
+;; interest only for legacy code going back to NumPy's predecessor
+;; Numeric.
+(define-public python2-numpy-1.8
+  (package (inherit python2-numpy)
+    (version "1.8.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://github.com/numpy/numpy/archive/v" version ".tar.gz"))
+       (file-name (string-append "python2-numpy-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0sc20gz1b17xnyrkp5frca3ql5qfalpv916hfg2kqxpwr6jg0f1g"))))
+    (arguments
+     (substitute-keyword-arguments (package-arguments python2-numpy)
+       ((#:phases phases)
+        `(modify-phases ,phases
+           (replace 'configure-blas-lapack
+             (lambda* (#:key inputs #:allow-other-keys)
+               (call-with-output-file "site.cfg"
+                 (lambda (port)
+                   (format port
+                           "[openblas]
+libraries = openblas,lapack
+library_dirs = ~a/lib:~a/lib
+include_dirs = ~a/include:~a/include
+"
+                           (assoc-ref inputs "openblas")
+                           (assoc-ref inputs "lapack")
+                           (assoc-ref inputs "openblas")
+                           (assoc-ref inputs "lapack"))))
+               #t))))))
+    (native-inputs
+     `(("python2-nose" ,python2-nose)))
+    (description "NumPy is the fundamental package for scientific computing
+with Python.  It contains among other things: a powerful N-dimensional array
+object, sophisticated (broadcasting) functions, tools for integrating C/C++
+and Fortran code, useful linear algebra, Fourier transform, and random number
+capabilities.  Version 1.8 is the last one to contain the numpy.oldnumeric API
+that includes the compatibility layer numpy.oldnumeric with NumPy's predecessor
+Numeric.")
+    (license license:bsd-3)))
+
+(define-public python-munch
+  (package
+    (name "python-munch")
+    (version "2.0.4")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "munch" version))
+        (sha256
+         (base32
+          "1cmqg91xnqx8gvnh4pmp0bfl1dfcm65d5p9mg73zz8pkjhx6h80l"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/Infinidat/munch")
+    (synopsis "Dot-accessible dictionary")
+    (description "Munch is a dot-accessible dictionary similar to JavaScript
+objects.")
+    (license license:expat)))
+
+(define-public python2-munch
+  (package-with-python2 python-munch))
+
+(define-public python-colormath
+  (package
+    (name "python-colormath")
+    (version "3.0.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "colormath" version))
+       (sha256
+        (base32
+         "05qjycgxp3p2f9n6lmic68sxmsyvgnnlyl4z9w7dl9s56jphaiix"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-networkx" ,python-networkx)
+       ("python-numpy" ,python-numpy)))
+    (home-page "https://github.com/gtaylor/python-colormath")
+    (synopsis "Color math and conversion library")
+    (description
+     "This is a Python library for color math and conversions.")
+    (license license:bsd-3)))
+
+(define-public python2-colormath
+  (package-with-python2 python-colormath))
+
+(define-public python-spectra
+  (package
+    (name "python-spectra")
+    (version "0.0.11")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "spectra" version))
+       (sha256
+        (base32
+         "1f322x914bhkg6r5gv1vmnir3iy0k5kih0fd2gp3rdkw32jn5cwf"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (zero? (system* "nosetests" "-v")))))))
+    (propagated-inputs
+     `(("python-colormath" ,python-colormath)))
+    (native-inputs
+     `(("python-nose" ,python-nose)))
+    (home-page "https://github.com/jsvine/spectra")
+    (synopsis "Color scales and color conversion")
+    (description
+     "This package provides a Python library intended to make color math,
+color scales, and color space conversion easy.  It has support for:
+
+@enumerate
+@item Color scales
+@item Color ranges
+@item Color blending
+@item Brightening/darkening colors
+@item Saturating/desaturating colors
+@item Conversion to/from multiple color spaces.
+@end enumerate\n")
+    (license license:expat)))
+
+(define-public python2-spectra
+  (package-with-python2 python-spectra))
+
+(define-public python-numpy-documentation
+  (package
+    (name "python-numpy-documentation")
+    (version (package-version python-numpy))
+    (source (package-source python-numpy))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-matplotlib" ,python-matplotlib)
+       ("python-numpy" ,python-numpy)
+       ("pkg-config" ,pkg-config)
+       ("python-sphinx" ,python-sphinx)
+       ("python-numpydoc" ,python-numpydoc)
+       ("texlive" ,(texlive-union (list texlive-fonts-amsfonts
+                                        texlive-fonts-cm-super
+                                        texlive-fonts-ec
+                                        texlive-generic-ifxetex
+                                        texlive-generic-pdftex
+                                        texlive-latex-amsfonts
+                                        texlive-latex-capt-of
+                                        texlive-latex-cmap
+                                        texlive-latex-environ
+                                        texlive-latex-eqparbox
+                                        texlive-latex-etoolbox
+                                        texlive-latex-expdlist
+                                        texlive-latex-fancyhdr
+                                        texlive-latex-fancyvrb
+                                        texlive-latex-fncychap
+                                        texlive-latex-float
+                                        texlive-latex-framed
+                                        texlive-latex-geometry
+                                        texlive-latex-graphics
+                                        texlive-latex-hyperref
+                                        texlive-latex-mdwtools
+                                        texlive-latex-multirow
+                                        texlive-latex-needspace
+                                        texlive-latex-oberdiek
+                                        texlive-latex-parskip
+                                        texlive-latex-preview
+                                        texlive-latex-tabulary
+                                        texlive-latex-threeparttable
+                                        texlive-latex-titlesec
+                                        texlive-latex-trimspaces
+                                        texlive-latex-ucs
+                                        texlive-latex-upquote
+                                        texlive-latex-url
+                                        texlive-latex-varwidth
+                                        texlive-latex-wrapfig)))
+       ("texinfo" ,texinfo)
+       ("perl" ,perl)
+       ("scipy-sphinx-theme"
+        ,(origin ; The build script expects scipy-sphinx-theme as a git submodule
+           (method git-fetch)
+           (uri (git-reference
+                 (url "https://github.com/scipy/scipy-sphinx-theme.git")
+                 (commit "c466764e2231ba132c09826b5b138fffa1cfcec3")))
+           (sha256
+            (base32
+             "0q2y87clwlsgc7wvlsn9pzyssybcq10plwhq2w1ydykfsyyqbmkl"))))
+       ,@(package-native-inputs python-numpy)))
+    (arguments
+     `(#:tests? #f ; we're only generating the documentation
+       #:phases
+       (modify-phases %standard-phases
+         (delete 'build)
+         (replace 'install
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((data (string-append (assoc-ref outputs "out") "/share"))
+                    (doc (string-append
+                          data "/doc/" ,name "-"
+                          ,(package-version python-numpy)))
+                    (info-reader (string-append data "/info"))
+                    (html (string-append doc "/html"))
+                    (scipy-sphinx-theme "scipy-sphinx-theme")
+                    (sphinx-theme-checkout (assoc-ref inputs scipy-sphinx-theme))
+                    (pyver ,(string-append "PYVER=")))
+
+               ;; FIXME: this is needed to for texlive-union to generate
+               ;; fonts, which are not found.
+               (setenv "HOME" "/tmp")
+
+               (with-directory-excursion "doc"
+                 (copy-recursively sphinx-theme-checkout scipy-sphinx-theme)
+                 (mkdir-p html)
+                 (system* "make" "html" pyver)
+                 (system* "make" "latex" "PAPER=a4" pyver)
+                 (system* "make" "-C" "build/latex"
+                          "all-pdf" "PAPER=a4" pyver)
+                 ;; FIXME: Generation of the info file fails.
+                 ;; (system* "make" "info" pyver)
+                 ;; (mkdir-p info)
+                 ;; (copy-file "build/texinfo/numpy.info"
+                 ;;            (string-append info "/numpy.info"))
+                 (for-each (lambda (file)
+                             (copy-file (string-append "build/latex" file)
+                                        (string-append doc file)))
+                           '("/numpy-ref.pdf" "/numpy-user.pdf"))
+                 (with-directory-excursion "build/html"
+                   (for-each (lambda (file)
+                               (let* ((dir (dirname file))
+                                      (tgt-dir (string-append html "/" dir)))
+                                 (unless (equal? "." dir)
+                                   (mkdir-p tgt-dir))
+                                 (install-file file html)))
+                             (find-files "." ".*")))))
+             #t)))))
+    (home-page (package-home-page python-numpy))
+    (synopsis "Documentation for the python-numpy package")
+    (description (package-description python-numpy))
+    (license (package-license python-numpy))))
+
+(define-public python2-numpy-documentation
+  (let ((numpy-documentation (package-with-python2 python-numpy-documentation)))
+    (package
+      (inherit numpy-documentation)
+      (native-inputs `(("python2-functools32" ,python2-functools32)
+                       ,@(package-native-inputs numpy-documentation))))))
+
+(define-public python-pygit2
+  (package
+    (name "python-pygit2")
+    (version "0.27.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pygit2" version))
+       (sha256
+        (base32
+         "046ahvsb7a20sgvscqfm3cb32sp3sii4gim9vz7zzrkf7yz16xlv"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         ;; Remove after the next update. See:
+         ;; https://github.com/libgit2/pygit2/pull/851
+         (add-after 'unpack 'compile-with-cffi
+           (lambda _
+             (substitute* "setup.py"
+               (("install_requires")
+                "setup_requires=['cffi'],\n      install_requires"))
+             #t))
+         (add-after 'unpack 'fix-dependency-versioning
+           (lambda _
+             (substitute* "setup.py"
+               (("<") "<="))
+             #t)))))
+    (propagated-inputs
+     `(("python-six" ,python-six)
+       ("python-cffi" ,python-cffi)
+       ("libgit2" ,libgit2)
+       ("python-tox" ,python-tox)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "https://github.com/libgit2/pygit2")
+    (synopsis "Python bindings for libgit2")
+    (description "Pygit2 is a set of Python bindings to the libgit2 shared
+library, libgit2 implements Git plumbing.")
+    ;; GPL2.0 only, with linking exception.
+    (license license:gpl2)))
+
+(define-public python2-pygit2
+  (package-with-python2 python-pygit2))
+
+(define-public python-pyparsing
+  (package
+    (name "python-pyparsing")
+    (version "2.2.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pyparsing" version))
+       (sha256
+        (base32 "06dgd0iilvf8m0ssmfpcbh8l6jf0zkp8adbb84llksg17crfx4zl"))))
+    (build-system python-build-system)
+    (outputs '("out" "doc"))
+    (arguments
+     `(#:tests? #f ; no test target
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'install 'install-doc
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((doc (string-append (assoc-ref outputs "doc")
+                                        "/share/doc/" ,name "-" ,version))
+                    (html-doc (string-append doc "/html"))
+                    (examples (string-append doc "/examples")))
+               (mkdir-p html-doc)
+               (mkdir-p examples)
+               (for-each
+                (lambda (dir tgt)
+                  (map (lambda (file)
+                         (install-file file tgt))
+                       (find-files dir ".*")))
+                (list "docs" "htmldoc" "examples")
+                (list doc html-doc examples))
+               #t))))))
+    (home-page "https://github.com/pyparsing/pyparsing")
+    (synopsis "Python parsing class library")
+    (description
+     "The pyparsing module is an alternative approach to creating and
+executing simple grammars, vs. the traditional lex/yacc approach, or the use
+of regular expressions.  The pyparsing module provides a library of classes
+that client code uses to construct the grammar directly in Python code.")
+    (license license:expat)))
+
+(define-public python2-pyparsing
+  (package-with-python2 python-pyparsing))
+
+(define-public python-numpydoc
+  (package
+    (name "python-numpydoc")
+    (version "0.8.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "numpydoc" version))
+       (sha256
+        (base32
+         "1zazxg3m8j4fksv3f7v7vpf4bj9qb1vj3r326am0vdip141vzx31"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-sphinx" ,python-sphinx)))
+    (native-inputs
+     `(("python-nose" ,python-nose)))
+    (home-page "https://pypi.python.org/pypi/numpydoc")
+    (synopsis
+     "Numpy's Sphinx extensions")
+    (description
+     "Sphinx extension to support docstrings in Numpy format.")
+    (license license:bsd-2)))
+
+(define-public python2-numpydoc
+  (package-with-python2 python-numpydoc))
+
+(define-public python-numexpr
+  (package
+    (name "python-numexpr")
+    (version "2.6.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "numexpr" version))
+       (sha256
+        (base32
+         "1frnbcwmsi312154x274xl28xazr1k8vjby83fwyla2n10a81bgq"))))
+    (build-system python-build-system)
+    (arguments `(#:tests? #f))          ; no tests included
+    (propagated-inputs
+     `(("python-numpy" ,python-numpy)))
+    (home-page "https://github.com/pydata/numexpr")
+    (synopsis "Fast numerical expression evaluator for NumPy")
+    (description
+     "Numexpr is a fast numerical expression evaluator for NumPy.  With it,
+expressions that operate on arrays are accelerated and use less memory than
+doing the same calculation in Python.  In addition, its multi-threaded
+capabilities can make use of all your cores, which may accelerate
+computations, most specially if they are not memory-bounded (e.g. those using
+transcendental functions).")
+    (license license:expat)))
+
+(define-public python2-numexpr
+  (package-with-python2 python-numexpr))
+
+(define-public python-cycler
+  (package
+    (name "python-cycler")
+    (version "0.10.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "cycler" version))
+              (sha256
+               (base32
+                "1n69n23fak1gjxlrbhqisi2b9pv3ckrfj98llx3p53953082syyd"))))
+    (build-system python-build-system)
+    (arguments
+     ;; XXX: The current version requires 'coveralls' which we don't have.
+     ;; Enable this for the next release which uses 'python-pytest'.
+     '(#:tests? #f))
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (home-page "http://matplotlib.org/cycler/")
+    (synopsis "Composable keyword argument iterator")
+    (description
+     "When using @code{matplotlib} and plotting more than one line, it is
+common to want to be able to want to be able to cycle over one or more artist
+styles; but the plotting logic can quickly become involved.
+To address this and enable easy cycling over arbitrary @code{kwargs}, the
+@code{Cycler} class was developed.")
+    (license license:bsd-3)))
+
+(define-public python2-cycler
+  (package-with-python2 python-cycler))
+
+(define-public python-colorspacious
+  (package
+    (name "python-colorspacious")
+    (version "1.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (string-append "https://github.com/njsmith/colorspacious/archive/v"
+                            version ".tar.gz"))
+        (file-name (string-append name "-" version))
+        (sha256
+         (base32 "1vflh5jm32qb0skza2i8pjacv09w6gq84fqpp2nj77s0rbmzgr4k"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-numpy" ,python-numpy)))
+    (native-inputs
+     `(("python-nose" ,python-nose)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (zero? (system* "nosetests" "--all-modules" "-v" "colorspacious")))))))
+    (home-page "https://github.com/njsmith/colorspacious")
+    (synopsis "Python library for colorspace conversions")
+    (description "@code{colorspacious} is a Python library that lets you
+convert between colorspaces like sRGB, XYZ, CIEL*a*b*, CIECAM02, CAM02-UCS, etc.")
+    (license license:expat)))
+
+(define-public python2-colorspacious
+  (package-with-python2 python-colorspacious))
+
+(define-public python-matplotlib
+  (package
+    (name "python-matplotlib")
+    (version "2.2.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "matplotlib" version))
+       (sha256
+        (base32
+         "1rcc7x9ig3hpchkc4cwdvym3y451w74275fxr455zkfagrsvymbk"))))
+    (build-system python-build-system)
+    (propagated-inputs ; the following packages are all needed at run time
+     `(("python-cycler" ,python-cycler)
+       ("python-kiwisolver" ,python-kiwisolver)
+       ("python-pyparsing" ,python-pyparsing)
+       ("python-pygobject" ,python-pygobject)
+       ("gobject-introspection" ,gobject-introspection)
+       ("python-tkinter" ,python "tk")
+       ("python-dateutil" ,python-dateutil)
+       ("python-numpy" ,python-numpy)
+       ("python-pillow" ,python-pillow)
+       ("python-pytz" ,python-pytz)
+       ("python-six" ,python-six)
+       ;; The 'gtk+' package (and 'gdk-pixbuf', 'atk' and 'pango' propagated
+       ;; from 'gtk+') provides the required 'typelib' files used by
+       ;; 'gobject-introspection'. The location of these files is set with the
+       ;; help of the environment variable GI_TYPELIB_PATH. At build time this
+       ;; is done automatically by a 'native-search-path' procedure. However,
+       ;; at run-time the user must set this variable as follows:
+       ;;
+       ;; export GI_TYPELIB_PATH=~/.guix-profile/lib/girepository-1.0
+       ("gtk+" ,gtk+)
+       ;; From version 1.4.0 'matplotlib' makes use of 'cairocffi' instead of
+       ;; 'pycairo'. However, 'pygobject' makes use of a 'pycairo' 'context'
+       ;; object. For this reason we need to import both libraries.
+       ;; https://pythonhosted.org/cairocffi/cffi_api.html#converting-pycairo
+       ("python-pycairo" ,python-pycairo)
+       ;; XXX: qtwebkit cannot be built reliably.
+       ("python-pyqt" ,python-pyqt-without-qtwebkit)
+       ("python-cairocffi" ,python-cairocffi)))
+    (inputs
+     `(("libpng" ,libpng)
+       ("imagemagick" ,imagemagick)
+       ("freetype" ,freetype)
+       ("cairo" ,cairo)
+       ("glib" ,glib)
+       ;; FIXME: Add backends when available.
+       ;("python-wxpython" ,python-wxpython)
+       ("tcl" ,tcl)
+       ("tk" ,tk)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)
+       ("python-nose" ,python-nose)
+       ("python-mock" ,python-mock)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'configure-environment
+           (lambda* (#:key outputs inputs #:allow-other-keys)
+             (let ((cairo (assoc-ref inputs "cairo"))
+                   (gtk+ (assoc-ref inputs "gtk+")))
+               ;; Setting these directories in the 'basedirlist' of 'setup.cfg'
+               ;; has not effect.
+               (setenv "LD_LIBRARY_PATH"
+                       (string-append cairo "/lib:" gtk+ "/lib"))
+               (setenv "HOME" (getcwd))
+               (call-with-output-file "setup.cfg"
+                 (lambda (port)
+                   (format port "[directories]~%
+basedirlist = ~a,~a~%
+ [rc_options]~%
+backend = TkAgg~%"
+                        (assoc-ref inputs "tcl")
+                        (assoc-ref inputs "tk")))))
+             #t)))))
+    (home-page "http://matplotlib.org")
+    (synopsis "2D plotting library for Python")
+    (description
+     "Matplotlib is a Python 2D plotting library which produces publication
+quality figures in a variety of hardcopy formats and interactive environments
+across platforms.  Matplotlib can be used in Python scripts, the python and
+ipython shell, web application servers, and six graphical user interface
+toolkits.")
+    (license license:psfl)
+    (properties `((python2-variant . ,(delay python2-matplotlib))))))
+
+(define-public python2-matplotlib
+  (let ((matplotlib (package-with-python2
+                     (strip-python2-variant python-matplotlib))))
+    (package (inherit matplotlib)
+      ;; Make sure to use special packages for Python 2 instead
+      ;; of those automatically rewritten by package-with-python2.
+      (propagated-inputs
+       `(("python2-pycairo" ,python2-pycairo)
+         ("python2-backports-functools-lru-cache"
+          ,python2-backports-functools-lru-cache)
+         ("python2-functools32" ,python2-functools32)
+         ("python2-pygobject-2" ,python2-pygobject-2)
+         ("python2-subprocess32" ,python2-subprocess32)
+         ("python2-tkinter" ,python-2 "tk")
+         ,@(fold alist-delete (package-propagated-inputs matplotlib)
+                 '("python-pycairo" "python-pygobject" "python-tkinter")))))))
+
+(define-public python-matplotlib-documentation
+  (package
+    (name "python-matplotlib-documentation")
+    (version (package-version python-matplotlib))
+    (source (package-source python-matplotlib))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-matplotlib" ,python-matplotlib)
+       ("python-colorspacious" ,python-colorspacious)
+       ("python-sphinx" ,python-sphinx)
+       ("python-sphinx-gallery" ,python-sphinx-gallery)
+       ("python-numpydoc" ,python-numpydoc)
+       ("python-ipython" ,python-ipython)
+       ("python-mock" ,python-mock)
+       ("graphviz" ,graphviz)
+       ("texlive" ,texlive)
+       ("texinfo" ,texinfo)
+       ,@(package-native-inputs python-matplotlib)))
+    (arguments
+     `(#:tests? #f ; we're only generating documentation
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'build
+           (lambda _
+             (chdir "doc")
+             ;; Produce pdf in 'A4' format.
+             (substitute* "conf.py"
+               (("latex_paper_size = 'letter'") "")
+               ;; latex_paper_size is deprecated -> set paper size using
+               ;; latex_elements
+               (("latex_elements\\['pointsize'\\] = '11pt'" match)
+                ;; insert at a point where latex_elements{} is defined:
+                (string-append match "\nlatex_elements['papersize'] = 'a4paper'")))
+             (invoke "make" "SPHINXBUILD=sphinx-build" "html" "latex" "texinfo")))
+         (replace 'install
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((data (string-append (assoc-ref outputs "out") "/share"))
+                    (doc (string-append data "/doc/python-matplotlib-" ,version))
+                    (info (string-append data "/info"))
+                    (html (string-append doc "/html")))
+               (mkdir-p html)
+               (mkdir-p info)
+               (copy-recursively "build/html" html)
+               (symlink (string-append html "/_images")
+                        (string-append info "/matplotlib-figures"))
+               (with-directory-excursion "build/texinfo"
+                 (substitute* "matplotlib.texi"
+                   (("@image\\{([^,]*)" all file)
+                    (string-append "@image{matplotlib-figures/" file)))
+                 (symlink (string-append html "/_images")
+                          "./matplotlib-figures")
+                 (system* "makeinfo" "--no-split"
+                          "-o" "matplotlib.info" "matplotlib.texi"))
+               (copy-file "build/texinfo/matplotlib.info"
+                          (string-append info "/matplotlib.info"))
+               (copy-file "build/latex/Matplotlib.pdf"
+                          (string-append doc "/Matplotlib.pdf")))
+             #t)))))
+    (home-page (package-home-page python-matplotlib))
+    (synopsis "Documentation for the python-matplotlib package")
+    (description (package-description python-matplotlib))
+    (license (package-license python-matplotlib))))
+
+(define-public python2-matplotlib-documentation
+  (package-with-python2 python-matplotlib-documentation))
+
+(define-public python2-pysnptools
+  (package
+    (name "python2-pysnptools")
+    (version "0.3.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pysnptools" version ".zip"))
+       (sha256
+        (base32
+         "1wybggjzz8zw7aav4pjsg2h22xp17a1lghrprza1pxwlm7wf96y2"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2)) ; only Python 2.7 is supported
+    (propagated-inputs
+     `(("python2-numpy" ,python2-numpy)
+       ("python2-scipy" ,python2-scipy)
+       ("python2-pandas" ,python2-pandas)))
+    (native-inputs
+     `(("python2-cython" ,python2-cython)))
+    (native-inputs
+     `(("unzip" ,unzip)))
+    (home-page "http://research.microsoft.com/en-us/um/redmond/projects/mscompbio/")
+    (synopsis "Library for reading and manipulating genetic data")
+    (description
+     "PySnpTools is a library for reading and manipulating genetic data.  It
+can, for example, efficiently read whole PLINK *.bed/bim/fam files or parts of
+those files.  It can also efficiently manipulate ranges of integers using set
+operators such as union, intersection, and difference.")
+    (license license:asl2.0)))
+
+(define-public python-scipy
+  (package
+    (name "python-scipy")
+    (version "1.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "scipy" version))
+       (sha256
+        (base32
+         "1lfg686w6vv2m2dfs8v9d0bf2i18z7wz5vgzjnkgmpr4hi0550w7"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-numpy" ,python-numpy)
+       ("python-matplotlib" ,python-matplotlib)
+       ("python-pyparsing" ,python-pyparsing)))
+    (inputs
+     `(("lapack" ,lapack)
+       ("openblas" ,openblas)))
+    (native-inputs
+     `(("python-cython" ,python-cython)
+       ("python-pytest" ,python-pytest)
+       ("python-sphinx" ,python-sphinx)
+       ("python-numpydoc" ,python-numpydoc)
+       ("gfortran" ,gfortran)
+       ("perl" ,perl)
+       ("which" ,which)))
+    (outputs '("out" "doc"))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'disable-broken-tests
+           (lambda _
+             (substitute* "scipy/sparse/linalg/dsolve/tests/test_linsolve.py"
+               (("^( +)def test_threads_parallel\\(self\\):" m indent)
+                (string-append indent
+                               "@pytest.mark.skip(reason=\"Disabled by Guix\")\n"
+                               m)))
+             (substitute* "scipy/sparse/linalg/eigen/arpack/tests/test_arpack.py"
+               (("^def test_parallel_threads\\(\\):" m)
+                (string-append "@pytest.mark.skip(reason=\"Disabled by Guix\")\n"
+                               m)))
+             #t))
+         (add-before 'build 'configure-openblas
+           (lambda* (#:key inputs #:allow-other-keys)
+             (call-with-output-file "site.cfg"
+               (lambda (port)
+                 (format port
+                         "[blas]
+libraries = openblas
+library_dirs = ~a/lib
+include_dirs = ~a/include
+
+# backslash-n to make emacs happy
+\n[atlas]
+library_dirs = ~a/lib
+atlas_libs = openblas
+"
+                         (assoc-ref inputs "openblas")
+                         (assoc-ref inputs "openblas")
+                         (assoc-ref inputs "openblas"))))
+             #t))
+         (add-after 'install 'install-doc
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((data (string-append (assoc-ref outputs "doc") "/share"))
+                    (doc (string-append data "/doc/" ,name "-" ,version))
+                    (html (string-append doc "/html"))
+                    (pyver ,(string-append "PYVER=" (version-major+minor
+                                                     (package-version python))))
+                    ;; By default it tries to run sphinx-build through the Python
+                    ;; interpreter which won't work with our shell wrapper.
+                    (sphinxbuild "SPHINXBUILD=LANG=C sphinx-build"))
+               ;; Make installed package available for building the
+               ;; documentation
+               (add-installed-pythonpath inputs outputs)
+               (with-directory-excursion "doc"
+                 ;; Fix generation of images for mathematical expressions.
+                 (substitute* (find-files "source" "conf\\.py")
+                   (("pngmath_use_preview = True")
+                    "pngmath_use_preview = False"))
+                 (mkdir-p html)
+                 (invoke "make" "html" pyver sphinxbuild)
+                 (with-directory-excursion "build/html"
+                   (for-each (lambda (file)
+                               (let* ((dir (dirname file))
+                                      (tgt-dir (string-append html "/" dir)))
+                                 (install-file file html)))
+                             (find-files "." ".*")))))
+             #t))
+         ;; Tests can only be run after the library has been installed and not
+         ;; within the source directory.
+         (delete 'check)
+         (add-after 'install 'check
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (add-installed-pythonpath inputs outputs)
+             (with-directory-excursion "/tmp"
+               (invoke "python" "-c"
+                       "import scipy; scipy.test(verbose=2)")))))))
+    (home-page "https://www.scipy.org/")
+    (synopsis "The Scipy library provides efficient numerical routines")
+    (description "The SciPy library is one of the core packages that make up
+the SciPy stack.  It provides many user-friendly and efficient numerical
+routines such as routines for numerical integration and optimization.")
+    (properties `((python2-variant . ,(delay python2-scipy))))
+    (license license:bsd-3)))
+
+(define-public python2-scipy
+  (package-with-python2
+   (strip-python2-variant python-scipy)))
+
+(define-public python-socksipy-branch
+  (package
+    (name "python-socksipy-branch")
+    (version "1.01")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "SocksiPy-branch" version))
+       (sha256
+        (base32
+         "01l41v4g7fy9fzvinmjxy6zcbhgqaif8dhdqm4w90fwcw9h51a8p"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f)) ; There are no tests
+    (home-page "https://code.google.com/archive/p/socksipy-branch/")
+    (synopsis "Python SOCKS module")
+    (description
+     "SocksiPy - A Python SOCKS client module.  It provides a
+socket-like interface that supports connections to any TCP
+service through the use of a SOCKS4, SOCKS5 or HTTP proxy.
+The original version was developed by Dan Haim, this is a
+branch created by Mario Vilas to address some open issues,
+as the original project seems to have been abandoned circa 2007.")
+    (license license:bsd-3)))
+
+(define-public python2-socksipy-branch
+  (package-with-python2 python-socksipy-branch))
+
+(define-public python-pycodestyle
+  (package
+    (name "python-pycodestyle")
+    (version "2.4.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pycodestyle" version))
+        (sha256
+          (base32
+            "0fhy4vnlgpjq4qd1wdnl6pvdw7rah0ypmn8c9mkhz8clsndskz6b"))))
+    (build-system python-build-system)
+    (home-page "https://pycodestyle.readthedocs.io/")
+    (synopsis "Python style guide checker")
+    (description "@code{pycodestyle} (formerly pep8) is a tool to check
+Python code against some of the style conventions in
+@url{http://www.python.org/dev/peps/pep-0008/,PEP 8}.")
+    (license license:expat)))
+
+(define-public python2-pycodestyle
+  (package-with-python2 python-pycodestyle))
+
+(define-public python-multidict
+  (package
+    (name "python-multidict")
+    (version "4.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "multidict" version))
+       (sha256
+        (base32
+         "1vf5bq8hn5a9rvhr5v4fwbmarfsp35hhr8gs74kqfijy34j2f194"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://github.com/aio-libs/multidict/")
+    (synopsis "Multidict implementation")
+    (description "Multidict is dict-like collection of key-value pairs
+where key might be occurred more than once in the container.")
+    (license license:asl2.0)))
+
+(define-public python-orderedmultidict
+  (package
+    (name "python-orderedmultidict")
+    (version "0.7.11")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "orderedmultidict" version))
+        (sha256
+          (base32
+            "0dls862ibm7qbq4fnvwx0xn1v9hwyzywbff8xjjdr42dd75208yw"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'fix-tests
+           (lambda _
+             ;; The package uses nosetest for running the tests.
+             ;; Adding this initfile allows to run the test suite
+             ;; without requiring nosetest.
+             (zero? (system* "touch" "tests/__init__.py")))))))
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (native-inputs
+     `(("python-pycodestyle" ,python-pycodestyle)))
+    (home-page "https://github.com/gruns/orderedmultidict")
+    (synopsis "Python Ordered Multivalue Dictionary - omdict")
+    (description "This package contains a library for ordered multivalue
+dictionaries.  A multivalue dictionary is a dictionary that can store
+multiple values for the same key.  An ordered multivalue dictionary is a
+multivalue dictionary that retains the order of insertions and deletions.")
+    (license license:unlicense)))
+
+(define-public python2-orderedmultidict
+  (package-with-python2 python-orderedmultidict))
+
+(define-public python-autopep8
+  (package
+    (name "python-autopep8")
+    (version "1.3.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "autopep8" version))
+       (sha256
+        (base32
+         "192bvhzi4d0claqxgzymvv7k3qnj627742bc8sgxpzjj42pd9112"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-pycodestyle" ,python-pycodestyle)))
+    (home-page "https://github.com/hhatto/autopep8")
+    (synopsis "Format Python code according to the PEP 8 style guide")
+    (description
+     "@code{autopep8} automatically formats Python code to conform to
+the PEP 8 style guide.  It uses the pycodestyle utility to determine
+what parts of the code needs to be formatted.  @code{autopep8} is
+capable of fixing most of the formatting issues that can be reported
+by pycodestyle.")
+    (license (license:non-copyleft
+              "https://github.com/hhatto/autopep8/blob/master/LICENSE"))))
+
+(define-public python2-autopep8
+  (package-with-python2 python-autopep8))
+
+(define-public python-distutils-extra
+  (package
+    (name "python-distutils-extra")
+    (version "2.38")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (string-append "https://launchpad.net/python-distutils-extra/trunk/"
+                          version "/+download/python-distutils-extra-"
+                          version ".tar.gz"))
+      (sha256
+       (base32
+        "0lx15kcbby9zisx33p2h5hgakgwh2bvh0ibag8z0px4j6ifhs41x"))))
+    (build-system python-build-system)
+    (home-page "https://launchpad.net/python-distutils-extra/")
+    (synopsis "Enhancements to Python's distutils")
+    (description
+     "The python-distutils-extra module enables you to easily integrate
+gettext support, themed icons, and scrollkeeper-based documentation into
+Python's distutils.")
+    (license license:gpl2)))
+
+(define-public python2-distutils-extra
+  (package-with-python2 python-distutils-extra))
+
+(define-public python2-elib.intl
+  (package
+    (name "python2-elib.intl")
+    (version "0.0.3")
+    (source
+     (origin
+       ;; This project doesn't tag releases or publish tarballs, so we take
+       ;; source from a (semi-arbitrary, i.e. latest as of now) git commit.
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/dieterv/elib.intl.git")
+             (commit "d09997cfef")))
+       (file-name (string-append name "-" version "-checkout"))
+       (sha256
+        (base32
+         "0y7vzff9xgbnaay7m0va1arl6g68ncwrvbgwl7jqlclsahzzb09d"))))
+    (build-system python-build-system)
+    (arguments
+     ;; incompatible with Python 3 (exception syntax)
+     `(#:python ,python-2
+       #:tests? #f))
+    (home-page "https://github.com/dieterv/elib.intl")
+    (synopsis "Enhanced internationalization for Python")
+    (description
+     "The elib.intl module provides enhanced internationalization (I18N)
+services for your Python modules and applications.")
+    (license license:lgpl3+)))
+
+(define-public python-olefile
+  (package
+    (name "python-olefile")
+    (version "0.45.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/decalage2/olefile/archive/v"
+                           version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "18ai19zwagm6nli14k8bii31ipbab2rp7plrvsm6gmfql551a8ai"))))
+    (build-system python-build-system)
+    (home-page
+     "https://www.decalage.info/python/olefileio")
+    (synopsis "Read and write Microsoft OLE2 files.")
+    (description
+     "@code{olefile} can parse, read and write Microsoft OLE2 files (Structured
+Storage or Compound Document, Microsoft Office).  It is an improved version of
+the OleFileIO module from PIL, the Python Image Library.")
+    (license license:bsd-3)))
+
+(define-public python2-olefile
+  (package-with-python2 python-olefile))
+
+(define-public python-pillow
+  (package
+    (name "python-pillow")
+    (version "5.4.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Pillow" version))
+       (sha256
+        (base32
+         "17waygkhhzjd75kajlfw9v57mbb41lcpg6cvkdijqd7smm76ccsj"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (inputs
+     `(("freetype" ,freetype)
+       ("lcms"     ,lcms)
+       ("zlib"     ,zlib)
+       ("libjpeg"  ,libjpeg)
+       ("openjpeg" ,openjpeg)
+       ("libtiff"  ,libtiff)
+       ("libwebp"  ,libwebp)))
+    (propagated-inputs
+     `(("python-olefile" ,python-olefile)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-ldconfig
+           (lambda _
+             (substitute* "setup.py"
+               (("\\['/sbin/ldconfig', '-p'\\]") "['true']"))))
+         (delete 'check) ; We must run checks after python-pillow is installed.
+         (add-after 'install 'check-installed
+           (lambda* (#:key outputs inputs #:allow-other-keys)
+             (begin
+               (setenv "HOME" (getcwd))
+               ;; Make installed package available for running the tests.
+               (add-installed-pythonpath inputs outputs)
+               (invoke "python" "selftest.py" "--installed")
+               (invoke "python" "-m" "pytest" "-vv")))))))
+    (home-page "https://python-pillow.org")
+    (synopsis "Fork of the Python Imaging Library")
+    (description
+     "The Python Imaging Library adds image processing capabilities to your
+Python interpreter.  This library provides extensive file format support, an
+efficient internal representation, and fairly powerful image processing
+capabilities.  The core image library is designed for fast access to data
+stored in a few basic pixel formats.  It should provide a solid foundation for
+a general image processing tool.")
+    (license (license:x11-style
+              "http://www.pythonware.com/products/pil/license.htm"
+              "The PIL Software License"))))
+
+(define-public python2-pillow
+  (package-with-python2 python-pillow))
+
+(define-public python-pycparser
+  (package
+    (name "python-pycparser")
+    (version "2.18")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "pycparser" version))
+      (sha256
+       (base32
+        "09mjyw82ibqzl449g7swy8bfxnfpmas0815d2rkdjlcqw81wma4r"))))
+    (outputs '("out" "doc"))
+    (build-system python-build-system)
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (with-directory-excursion "tests"
+               (zero? (system* "python" "all_tests.py")))))
+         (add-after 'install 'install-doc
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((data (string-append (assoc-ref outputs "doc") "/share"))
+                    (doc (string-append data "/doc/" ,name "-" ,version))
+                    (examples (string-append doc "/examples")))
+               (mkdir-p examples)
+               (for-each (lambda (file)
+                           (copy-file (string-append "." file)
+                                      (string-append doc file)))
+                         '("/README.rst" "/CHANGES" "/LICENSE"))
+               (copy-recursively "examples" examples)))))))
+    (home-page "https://github.com/eliben/pycparser")
+    (synopsis "C parser in Python")
+    (description
+     "Pycparser is a complete parser of the C language, written in pure Python
+using the PLY parsing library.  It parses C code into an AST and can serve as
+a front-end for C compilers or analysis tools.")
+    (license license:bsd-3)))
+
+(define-public python2-pycparser
+  (package-with-python2 python-pycparser))
+
+(define-public python-pywavelets
+  (package
+    (name "python-pywavelets")
+    (version "1.0.1")
+    (home-page "https://github.com/PyWavelets/pywt")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "PyWavelets" version))
+              (sha256
+               (base32
+                "1p3qv2v66ghnqrb1f98wyyhp9dz71jwcd6kfpsax65sfdpiyqp1w"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:modules ((ice-9 ftw)
+                  (srfi srfi-1)
+                  (srfi srfi-26)
+                  (guix build utils)
+                  (guix build python-build-system))
+       #:phases (modify-phases %standard-phases
+                  (replace 'check
+                    (lambda _
+                      (let ((cwd (getcwd))
+                            (libdir (find (cut string-prefix? "lib." <>)
+                                          (scandir "build"))))
+                      (with-directory-excursion (string-append cwd "/build/" libdir)
+                        (invoke "nosetests" "-v" "."))))))))
+    (native-inputs
+     `(("python-matplotlib" ,python-matplotlib)          ;for tests
+       ("python-nose" ,python-nose)))
+    (propagated-inputs
+     `(("python-numpy" ,python-numpy)))
+    (synopsis "Wavelet transforms in Python")
+    (description
+     "PyWavelets is a library for wavelet transforms in Python.  Wavelets are
+mathematical basis functions that are localized in both time and frequency.
+Wavelet transforms are time-frequency transforms employing wavelets.  They are
+similar to Fourier transforms, the difference being that Fourier transforms are
+localized only in frequency instead of in time and frequency.")
+    (license license:expat)))
+
+(define-public python2-pywavelets
+  (package-with-python2 python-pywavelets))
+
+(define-public python-xcffib
+  (package
+    (name "python-xcffib")
+    (version "0.6.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "xcffib" version))
+      (sha256
+       (base32
+        "04k91yxyb3pgc5lvxmivh8w71yjrap2g57yk3s73x4rm4nvjq51n"))))
+    (build-system python-build-system)
+    (inputs
+     `(("libxcb" ,libxcb)))
+    (propagated-inputs
+     `(("python-cffi" ,python-cffi) ; used at run time
+       ("python-six" ,python-six)))
+    (arguments
+     `(;; FIXME: Tests need more work. See ".travis.yml" in the repository.
+       #:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'fix-libxcb-path
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((libxcb (assoc-ref inputs "libxcb")))
+               (substitute* '("xcffib/__init__.py")
+                 (("^soname = \"") (string-append "soname = \"" libxcb "/lib/")))
+               #t)))
+         (add-after 'install 'install-doc
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let ((doc (string-append (assoc-ref outputs "out") "/share"
+                                       "/doc/" ,name "-" ,version)))
+               (mkdir-p doc)
+               (copy-file "README.md"
+                          (string-append doc "/README.md"))
+               #t))))))
+    (home-page "https://github.com/tych0/xcffib")
+    (synopsis "XCB Python bindings")
+    (description
+     "Xcffib is a replacement for xpyb, an XCB Python bindings.  It adds
+support for Python 3 and PyPy.  It is based on cffi.")
+    (license license:expat)))
+
+(define-public python2-xcffib
+  (package-with-python2 python-xcffib))
+
+(define-public python-cairocffi
+  (package
+    (name "python-cairocffi")
+    (version "0.9.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "cairocffi" version))
+      (sha256
+       (base32
+        "0dq3k4zhqd8cwsf3nyjqvjqm8wkvrjn1wjf44rl3v0h8kqx6qf0m"))
+      (patches (search-patches "python-cairocffi-dlopen-path.patch"))))
+    (build-system python-build-system)
+    (outputs '("out" "doc"))
+    (inputs
+     `(("glib" ,glib)
+       ("gtk+" ,gtk+)
+       ("gdk-pixbuf" ,gdk-pixbuf)
+       ("cairo" ,cairo)
+       ("pango" ,pango)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-cov" ,python-pytest-cov)
+       ("python-pytest-runner" ,python-pytest-runner)
+       ("python-sphinx" ,python-sphinx)
+       ("python-docutils" ,python-docutils)))
+    (propagated-inputs
+     `(("python-xcffib" ,python-xcffib))) ; used at run time
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-paths
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (substitute* (find-files "." "\\.py$")
+              (("dlopen\\(ffi, 'cairo'")
+               (string-append "dlopen(ffi, '" (assoc-ref inputs "cairo")
+                              "/lib/libcairo.so.2'"))
+              (("dlopen\\(ffi, 'gdk-3'")
+               (string-append "dlopen(ffi, '" (assoc-ref inputs "gtk+")
+                              "/lib/libgtk-3.so.0'"))
+              (("dlopen\\(ffi, 'gdk_pixbuf-2.0'")
+               (string-append "dlopen(ffi, '" (assoc-ref inputs "gdk-pixbuf")
+                              "/lib/libgdk_pixbuf-2.0.so.0'"))
+              (("dlopen\\(ffi, 'glib-2.0'")
+               (string-append "dlopen(ffi, '" (assoc-ref inputs "glib")
+                              "/lib/libglib-2.0.so.0'"))
+              (("dlopen\\(ffi, 'gobject-2.0'")
+               (string-append "dlopen(ffi, '" (assoc-ref inputs "glib")
+                              "/lib/libgobject-2.0.so.0'"))
+              (("dlopen\\(ffi, 'pangocairo-1.0'")
+               (string-append "dlopen(ffi, '" (assoc-ref inputs "pango")
+                              "/lib/libpangocairo-1.0.so.0'"))
+              (("dlopen\\(ffi, 'pango-1.0'")
+               (string-append "dlopen(ffi, '" (assoc-ref inputs "pango")
+                              "/lib/libpango-1.0.so.0'")))
+             #t))
+         (add-after 'install 'install-doc
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((data (string-append (assoc-ref outputs "doc") "/share"))
+                    (doc (string-append data "/doc/" ,name "-" ,version))
+                    (html (string-append doc "/html")))
+               (setenv "LD_LIBRARY_PATH"
+                       (string-append (assoc-ref inputs "cairo") "/lib" ":"
+                                      (assoc-ref inputs "gdk-pixbuf") "/lib"))
+               (setenv "LANG" "en_US.UTF-8")
+               (mkdir-p html)
+               (for-each (lambda (file)
+                           (copy-file (string-append "." file)
+                                      (string-append doc file)))
+                         '("/README.rst" "/CHANGES" "/LICENSE"))
+               (system* "python" "setup.py" "build_sphinx")
+               (copy-recursively "docs/_build/html" html)
+               #t))))))
+    (home-page "https://github.com/Kozea/cairocffi")
+    (synopsis "Python bindings and object-oriented API for Cairo")
+    (description
+     "Cairocffi is a CFFI-based drop-in replacement for Pycairo, a set of
+Python bindings and object-oriented API for cairo.  Cairo is a 2D vector
+graphics library with support for multiple backends including image buffers,
+PNG, PostScript, PDF, and SVG file output.")
+    (license license:bsd-3)))
+
+(define-public python2-cairocffi
+  (package-with-python2 python-cairocffi))
+
+(define-public python-decorator
+  (package
+    (name "python-decorator")
+    (version "4.3.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "decorator" version))
+       (sha256
+        (base32 "0308djallnh00v112y5b7nadl657ysmkp6vc8xn51d6yzc9zm7n3"))))
+    (build-system python-build-system)
+    (home-page "https://pypi.python.org/pypi/decorator/")
+    (synopsis "Python module to simplify usage of decorators")
+    (description
+      "The aim of the decorator module is to simplify the usage of decorators
+for the average programmer, and to popularize decorators usage giving examples
+of useful decorators, such as memoize, tracing, redirecting_stdout, locked,
+etc.  The core of this module is a decorator factory.")
+    (license license:expat)))
+
+(define-public python2-decorator
+  (package-with-python2 python-decorator))
+
+(define-public python-drmaa
+  (package
+    (name "python-drmaa")
+    (version "0.7.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "drmaa" version))
+       (sha256
+        (base32 "0xzqriqyvk5b8hszbavsyxd29wm3sxirm8zvvdm73rs2iq7w4hkx"))))
+    (build-system python-build-system)
+    ;; The test suite requires libdrmaa which is provided by the cluster
+    ;; environment.  At runtime the environment variable DRMAA_LIBRARY_PATH
+    ;; should be set to the path of the libdrmaa library.
+    (arguments '(#:tests? #f))
+    (native-inputs
+     `(("python-nose" ,python-nose)))
+    (home-page "https://pypi.python.org/pypi/drmaa")
+    (synopsis "Python bindings for the DRMAA library")
+    (description
+      "A Python package for Distributed Resource Management (DRM) job
+submission and control.  This package is an implementation of the DRMAA 1.0
+Python language binding specification.")
+    (license license:bsd-3)))
+
+(define-public python2-drmaa
+  (package-with-python2 python-drmaa))
+
+(define-public python-grako
+  (package
+    (name "python-grako")
+    (version "3.99.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri
+        (pypi-uri "grako" version ".zip"))
+       (sha256
+        (base32
+         "0r63i68wcnv63rfjkasq1ah81frz61a6mzbcnaxhrkdpx84p7hzw"))))
+    (build-system python-build-system)
+    (arguments '(#:tests? #f)) ; Test file 'grako.ebnf' is missing from archive.
+    (native-inputs
+     `(("unzip" ,unzip)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://bitbucket.org/neogeny/grako")
+    (synopsis "EBNF parser generator")
+    (description
+     "Grako takes a grammar in a variation of EBNF as input, and outputs a
+memoizing PEG/Packrat parser in Python.")
+    (license license:bsd-3)))
+
+(define-public python2-grako
+  (package-with-python2 python-grako))
+
+(define-public python-gridmap
+  (package
+    (name "python-gridmap")
+    (version "0.13.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://github.com/pygridtools/gridmap/archive/v"
+             version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1gzjg2k6f14i1msm2b0ax8d9ds1hvk6qd5nlaivg8m4cxqp4cp1x"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; FIXME: Requires python-cherrypy.
+    (propagated-inputs
+     `(("python-psutil" ,python-psutil)
+       ("python-drmaa" ,python-drmaa)
+       ("python-pyzmq" ,python-pyzmq)))
+    (home-page "https://github.com/pygridtools/gridmap")
+    (synopsis "Create jobs on a cluster directly from Python")
+    (description
+      "Gridmap is a Python package to allow you to easily create jobs on the
+cluster directly from Python.  You can directly map Python functions onto the
+cluster without needing to write any wrapper code yourself.")
+    (license license:gpl3+)))
+
+(define-public python2-gridmap
+  (package-with-python2 python-gridmap))
+
+(define-public python-honcho
+  (package
+    (name "python-honcho")
+    (version "1.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://github.com/nickstenning/honcho/archive/v"
+             version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "0zizn61n5z5hq421hkypk9pw8s6fpxw30f4hsg7k4ivwzy3gjw9j"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-mock" ,python-mock)
+       ("python-tox" ,python-tox)
+       ("which" ,which))) ;for tests
+    (propagated-inputs
+     `(("python-jinja2" ,python-jinja2)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (delete 'check)
+         (add-after 'install 'check
+           (lambda* (#:key outputs inputs #:allow-other-keys)
+             ;; fix honcho path in testsuite
+             (substitute* "tests/conftest.py"
+               (("'honcho'") (string-append "'" (assoc-ref outputs "out")
+                                            "/bin/honcho" "'")))
+             ;; It's easier to run tests after install.
+             ;; Make installed package available for running the tests
+             (add-installed-pythonpath inputs outputs)
+             (zero? (system* "py.test" "-v")))))))
+    (home-page "https://github.com/nickstenning/honcho")
+    (synopsis "Manage Procfile-based applications")
+    (description
+      "A Procfile is a file which describes how to run an application
+consisting of serveral processes. honcho starts all listed processes.
+The output of all running processes is collected by honcho and
+displayed.")
+    (license license:expat)))
+
+(define-public python2-honcho
+  (package-with-python2 python-honcho))
+
+(define-public python-pexpect
+  (package
+    (name "python-pexpect")
+    (version "4.6.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pexpect" version))
+       (sha256
+        (base32 "1fla85g47iaxxpjhp9vkxdnv4pgc7rplfy6ja491smrrk0jqi3ia"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'prepare-tests
+           (lambda _
+             (substitute* (find-files "tests")
+               (("/bin/ls") (which "ls"))
+               (("/bin/echo") (which "echo"))
+               (("/bin/which") (which "which"))
+               ;; Many tests try to use the /bin directory which
+               ;; is not present in the build environment.
+               ;; Use one that's non-empty and unlikely to change.
+               (("/bin'") "/dev'"))
+             ;; XXX: Socket connection test gets "Connection reset by peer".
+             ;; Why does it not work? Delete for now.
+             (delete-file "tests/test_socket.py")
+             #t))
+         (replace 'check (lambda _ (invoke "nosetests" "-v"))))))
+    (native-inputs
+     `(("python-nose" ,python-nose)
+       ("python-pytest" ,python-pytest)
+       ("man-db" ,man-db)
+       ("which" ,which)
+       ("bash-full" ,bash)))                 ;full Bash for 'test_replwrap.py'
+    (propagated-inputs
+     `(("python-ptyprocess" ,python-ptyprocess)))
+    (home-page "http://pexpect.readthedocs.org/")
+    (synopsis "Controlling interactive console applications")
+    (description
+     "Pexpect is a pure Python module for spawning child applications;
+controlling them; and responding to expected patterns in their output.
+Pexpect works like Don Libes’ Expect.  Pexpect allows your script to spawn a
+child application and control it as if a human were typing commands.")
+    (license license:isc)))
+
+(define-public python2-pexpect
+  (package-with-python2 python-pexpect))
+
+(define-public python-setuptools-scm
+  (package
+    (name "python-setuptools-scm")
+    (version "3.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "setuptools_scm" version))
+              (sha256
+               (base32
+                "0h4bglwfz8b9prqljv8z3w9rgydfyxzaj05bm1y6zs5m6shz548i"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/pypa/setuptools_scm/")
+    (synopsis "Manage Python package versions in SCM metadata")
+    (description
+     "Setuptools_scm handles managing your Python package versions in
+@dfn{software configuration management} (SCM) metadata instead of declaring
+them as the version argument or in a SCM managed file.")
+    (license license:expat)))
+
+(define-public python2-setuptools-scm
+  (package-with-python2 python-setuptools-scm))
+
+(define-public python-pathpy
+  (package
+    (name "python-pathpy")
+    (version "11.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "path.py" version))
+       (sha256
+        (base32 "07x15v8c7ry9bvycw294c9yq6ky9v2b0dalvgi6rn38ilh69vsz7"))))
+    ;; (outputs '("out" "doc"))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-appdirs" ,python-appdirs)))
+    (native-inputs
+     `(("python-setuptools-scm" ,python-setuptools-scm)
+       ("python-sphinx" ,python-sphinx)
+       ("python-rst.linker" ,python-rst.linker)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (arguments
+     ;; FIXME: Documentation and tests require "jaraco.packaging".
+     `(#:tests? #f))
+    ;;    #:phases
+    ;;    (modify-phases %standard-phases
+    ;;      (add-after 'build 'build-doc
+    ;;        (lambda _
+    ;;          (setenv "LANG" "en_US.UTF-8")
+    ;;          (zero? (system* "python" "setup.py" "build_sphinx"))))
+    ;;      (add-after 'install 'install-doc
+    ;;        (lambda* (#:key outputs #:allow-other-keys)
+    ;;          (let* ((data (string-append (assoc-ref outputs "doc") "/share"))
+    ;;                 (doc (string-append data "/doc/" ,name "-" ,version))
+    ;;                 (html (string-append doc "/html")))
+    ;;            (mkdir-p html)
+    ;;            (for-each (lambda (file)
+    ;;                        (copy-file file (string-append doc "/" file)))
+    ;;                      '("README.rst" "CHANGES.rst"))
+    ;;            (copy-recursively "build/sphinx/html" html)))))))
+    (home-page "https://github.com/jaraco/path.py")
+    (synopsis "Python module wrapper for built-in os.path")
+    (description
+     "@code{path.py} implements path objects as first-class entities, allowing
+common operations on files to be invoked on those path objects directly.")
+    (license license:expat)))
+
+(define-public python2-pathpy
+  (package-with-python2 python-pathpy))
+
+(define-public python-simplegeneric
+  (package
+    (name "python-simplegeneric")
+    (version "0.8.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://pypi.python.org/packages/source/s/"
+                           "simplegeneric/simplegeneric-" version ".zip"))
+       (sha256
+        (base32 "0wwi1c6md4vkbcsfsf8dklf3vr4mcdj4mpxkanwgb6jb1432x5yw"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("unzip" ,unzip)))
+    (home-page "http://cheeseshop.python.org/pypi/simplegeneric")
+    (synopsis "Python module for simple generic functions")
+    (description
+     "The simplegeneric module lets you define simple single-dispatch generic
+functions, akin to Python’s built-in generic functions like @code{len()},
+@code{iter()} and so on.  However, instead of using specially-named methods,
+these generic functions use simple lookup tables, akin to those used by
+e.g. @code{pickle.dump()} and other generic functions found in the Python
+standard library.")
+    (license license:zpl2.1)))
+
+(define-public python2-simplegeneric
+  (package-with-python2 python-simplegeneric))
+
+(define-public python-ipython-genutils
+  ;; TODO: This package is retired, check if can be removed, see description.
+  (package
+    (name "python-ipython-genutils")
+    (version "0.1.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (string-append "https://pypi.python.org/packages/source/i/"
+                          "ipython_genutils/ipython_genutils-"
+                          version ".tar.gz"))
+      (sha256
+       (base32 "19l2pp1c64ansr89l3cqh19jdi2ixhssdzx0vz4n6r52a6i281is"))))
+    (build-system python-build-system)
+    (arguments `(#:tests? #f)) ; no tests
+    (home-page "https://ipython.org")
+    (synopsis "Vestigial utilities from IPython")
+    (description
+     "This package provides retired utilities from IPython.  No packages
+outside IPython/Jupyter should depend on it.
+
+This package shouldn't exist.  It contains some common utilities shared by
+Jupyter and IPython projects during The Big Split.  As soon as possible, those
+packages will remove their dependency on this, and this package will go
+away.")
+    (license license:bsd-3)))
+
+(define-public python2-ipython-genutils
+  (package-with-python2 python-ipython-genutils))
+
+(define-public python-traitlets
+  (package
+    (name "python-traitlets")
+    (version "4.3.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "traitlets" version))
+       (sha256
+        (base32
+         "0dbq7sx26xqz5ixs711k5nc88p8a0nqyz6162pwks5dpcz9d4jww"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check (lambda _ (invoke "pytest" "-vv" "traitlets"))))))
+    (propagated-inputs
+     `(("python-ipython-genutils" ,python-ipython-genutils)
+       ("python-decorator" ,python-decorator)))    ;not needed for >4.3.2
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (properties `((python2-variant . ,(delay python2-traitlets))))
+    (home-page "https://ipython.org")
+    (synopsis "Configuration system for Python applications")
+    (description
+     "Traitlets is a framework that lets Python classes have attributes with
+type checking, dynamically calculated default values, and ‘on change’
+callbacks.  The package also includes a mechanism to use traitlets for
+configuration, loading values from files or from command line arguments.  This
+is a distinct layer on top of traitlets, so you can use traitlets in your code
+without using the configuration machinery.")
+    (license license:bsd-3)))
+
+(define-public python2-traitlets
+  (let ((traitlets (package-with-python2 (strip-python2-variant python-traitlets))))
+    (package
+      (inherit traitlets)
+      (propagated-inputs
+       `(("python2-enum34" ,python2-enum34)
+         ,@(package-propagated-inputs traitlets))))))
+
+(define-public python-jupyter-core
+  (package
+    (name "python-jupyter-core")
+    (version "4.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append (pypi-uri "jupyter_core" version)))
+       (sha256
+        (base32
+         "1dy083rarba8prn9f9srxq3c7n7vyql02ycrqq306c40lr57aw5s"))))
+    (build-system python-build-system)
+    ;; FIXME: not sure how to run the tests
+    (arguments `(#:tests? #f))
+    (propagated-inputs
+     `(("python-traitlets" ,python-traitlets)))
+    (home-page "http://jupyter.org/")
+    (synopsis "Jupyter base package")
+    (description
+     "Jupyter core is the base package on which Jupyter projects rely.")
+    (license license:bsd-3)))
+
+(define-public python2-jupyter-core
+  (package-with-python2 python-jupyter-core))
+
+(define-public python-jupyter-client
+  (package
+    (name "python-jupyter-client")
+    (version "5.2.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "jupyter_client" version))
+       (sha256
+        (base32
+         "0l9mh7ccrpl3lppym3dnky8n1nk7xarzzdcxf4q2s7aw203cpydm"))))
+    (build-system python-build-system)
+    ;; Tests fail because of missing native python kernel which I assume is
+    ;; provided by the ipython package, which we cannot use because it would
+    ;; cause a dependency cycle.
+    (arguments `(#:tests? #f))
+    (propagated-inputs
+     `(("python-pyzmq" ,python-pyzmq)
+       ("python-traitlets" ,python-traitlets)
+       ("python-jupyter-core" ,python-jupyter-core)))
+    (home-page "http://jupyter.org/")
+    (synopsis "Jupyter protocol implementation and client libraries")
+    (description
+     "The @code{jupyter_client} package contains the reference implementation
+of the Jupyter protocol.  It also provides client and kernel management APIs
+for working with kernels, and the @code{jupyter kernelspec} entrypoint for
+installing @code{kernelspec}s for use with Jupyter frontends.")
+    (license license:bsd-3)))
+
+(define-public python2-jupyter-client
+  (package-with-python2 python-jupyter-client))
+
+(define-public python-ipykernel
+  (package
+    (name "python-ipykernel")
+    (version "5.1.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "ipykernel" version))
+      (sha256
+       (base32 "0br95qhrd5k65g10djngiy27hs0642301hlf2q142i8djabvzh0g"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (setenv "HOME" "/tmp")
+             (invoke "pytest" "-v")
+             #t)))))
+    (propagated-inputs
+     `(("python-ipython" ,python-ipython)
+       ;; imported at runtime during connect
+       ("python-jupyter-client" ,python-jupyter-client)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-nose" ,python-nose)))
+    (home-page "https://ipython.org")
+    (synopsis "IPython Kernel for Jupyter")
+    (description
+     "This package provides the IPython kernel for Jupyter.")
+    (license license:bsd-3)))
+
+(define-public python2-ipykernel
+  (package-with-python2 python-ipykernel))
+
+(define-public python-send2trash
+  (package
+    (name "python-send2trash")
+    (version "1.5.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "send2trash" version))
+       (sha256
+        (base32
+         "1ci8vcwjmjlp11ljj1ckrfmml9fkq1mclx2gr53y4zvhgp01q030"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/hsoft/send2trash")
+    (synopsis "Send files to trash")
+    (description
+     "This package provides a cross-platform mechanism to send files to the
+trash.")
+    (license license:bsd-3)))
+
+(define-public python2-send2trash
+  (package-with-python2 python-send2trash))
+
+;; This is the latest release of the LTS version of ipython with support for
+;; Python 2.7 and Python 3.x.  Later non-LTS versions starting from 6.0 have
+;; dropped support for Python 2.7.  We may want to rename this package.
+(define-public python-ipython
+  (package
+    (name "python-ipython")
+    (version "5.8.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ipython" version ".tar.gz"))
+       (sha256
+        (base32 "01l93i4hspf0lvhmycvc8j378bslm9rw30mwfspsl6v1ayc69b2b"))))
+    (build-system python-build-system)
+    (outputs '("out" "doc"))
+    (propagated-inputs
+     `(("python-pyzmq" ,python-pyzmq)
+       ("python-prompt-toolkit" ,python-prompt-toolkit-1)
+       ("python-terminado" ,python-terminado)
+       ("python-matplotlib" ,python-matplotlib)
+       ("python-numpy" ,python-numpy)
+       ("python-numpydoc" ,python-numpydoc)
+       ("python-jinja2" ,python-jinja2)
+       ("python-mistune" ,python-mistune)
+       ("python-pexpect" ,python-pexpect)
+       ("python-pickleshare" ,python-pickleshare)
+       ("python-simplegeneric" ,python-simplegeneric)
+       ("python-jsonschema" ,python-jsonschema)
+       ("python-traitlets" ,python-traitlets)
+       ("python-nbformat" ,python-nbformat)
+       ("python-pygments" ,python-pygments)))
+    (inputs
+     `(("readline" ,readline)
+       ("which" ,which)))
+    (native-inputs
+     `(("graphviz" ,graphviz)
+       ("pkg-config" ,pkg-config)
+       ("python-requests" ,python-requests) ;; for tests
+       ("python-testpath" ,python-testpath)
+       ("python-nose" ,python-nose)
+       ("python-sphinx" ,python-sphinx)
+       ("python-shpinx-rtd-theme" ,python-sphinx-rtd-theme)
+       ;; FIXME: It's possible that a smaller union would work just as well.
+       ("texlive" ,(texlive-union (list texlive-fonts-amsfonts
+                                        texlive-fonts-ec
+                                        texlive-generic-ifxetex
+                                        texlive-generic-pdftex
+                                        texlive-latex-amsfonts
+                                        texlive-latex-capt-of
+                                        texlive-latex-cmap
+                                        texlive-latex-environ
+                                        texlive-latex-eqparbox
+                                        texlive-latex-etoolbox
+                                        texlive-latex-expdlist
+                                        texlive-latex-fancyhdr
+                                        texlive-latex-fancyvrb
+                                        texlive-latex-fncychap
+                                        texlive-latex-float
+                                        texlive-latex-framed
+                                        texlive-latex-geometry
+                                        texlive-latex-graphics
+                                        texlive-latex-hyperref
+                                        texlive-latex-mdwtools
+                                        texlive-latex-multirow
+                                        texlive-latex-oberdiek
+                                        texlive-latex-parskip
+                                        texlive-latex-preview
+                                        texlive-latex-tabulary
+                                        texlive-latex-threeparttable
+                                        texlive-latex-titlesec
+                                        texlive-latex-trimspaces
+                                        texlive-latex-ucs
+                                        texlive-latex-upquote
+                                        texlive-latex-url
+                                        texlive-latex-varwidth
+                                        texlive-latex-wrapfig)))
+       ("texinfo" ,texinfo)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'install 'install-doc
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (let* ((data (string-append (assoc-ref outputs "doc") "/share"))
+                    (doc (string-append data "/doc/" ,name "-" ,version))
+                    (html (string-append doc "/html"))
+                    (man1 (string-append data "/man/man1"))
+                    (info (string-append data "/info"))
+                    (examples (string-append doc "/examples"))
+                    (python-arg (string-append "PYTHON=" (which "python"))))
+               (setenv "LANG" "en_US.utf8")
+               ;; Make installed package available for running the tests
+               (add-installed-pythonpath inputs outputs)
+               (with-directory-excursion "docs"
+                 ;; FIXME: pdf fails to build
+                 ;;(system* "make" "pdf" "PAPER=a4")
+                 (system* "make" python-arg "html")
+                 (system* "make" python-arg "info"))
+               (copy-recursively "docs/man" man1)
+               (copy-recursively "examples" examples)
+               (copy-recursively "docs/build/html" html)
+               ;; (copy-file "docs/build/latex/ipython.pdf"
+               ;;            (string-append doc "/ipython.pdf"))
+               (mkdir-p info)
+               (copy-file "docs/build/texinfo/ipython.info"
+                          (string-append info "/ipython.info"))
+               (copy-file "COPYING.rst" (string-append doc "/COPYING.rst")))
+             #t))
+         ;; Tests can only be run after the library has been installed and not
+         ;; within the source directory.
+         (delete 'check)
+         (add-after 'install 'check
+           (lambda* (#:key inputs outputs tests? #:allow-other-keys)
+             (if tests?
+                 (begin
+                   ;; Make installed package available for running the tests
+                   (add-installed-pythonpath inputs outputs)
+                   (setenv "HOME" "/tmp/") ;; required by a test
+                   ;; We only test the core because one of the other tests
+                   ;; tries to import ipykernel.
+                   (invoke "python" "IPython/testing/iptest.py"
+                           "-v" "IPython/core/tests"))
+                 #t)))
+         (add-before 'check 'fix-tests
+           (lambda* (#:key inputs #:allow-other-keys)
+             (substitute* "./IPython/utils/_process_posix.py"
+               (("/usr/bin/env', 'which") (which "which")))
+             (substitute* "./IPython/core/tests/test_inputtransformer.py"
+               (("#!/usr/bin/env python")
+                (string-append "#!" (which "python"))))
+             ;; Disable 1 failing test
+             (substitute* "./IPython/core/tests/test_magic.py"
+               (("def test_dirops\\(\\):" all)
+                (string-append "@dec.skipif(True)\n" all)))
+             ;; This test introduces a circular dependency on ipykernel
+             ;; (which depends on ipython).
+             (delete-file "IPython/core/tests/test_display.py")
+             ;; These tests throw errors for unknown reasons.
+             (delete-file "IPython/extensions/tests/test_storemagic.py")
+             (delete-file "IPython/core/tests/test_displayhook.py")
+             (delete-file "IPython/core/tests/test_interactiveshell.py")
+             (delete-file "IPython/core/tests/test_pylabtools.py")
+             (delete-file "IPython/core/tests/test_paths.py")
+             #t)))))
+    (home-page "https://ipython.org")
+    (synopsis "IPython is a tool for interactive computing in Python")
+    (description
+     "IPython provides a rich architecture for interactive computing with:
+Powerful interactive shells, a browser-based notebook, support for interactive
+data visualization, embeddable interpreters and tools for parallel
+computing.")
+    (license license:bsd-3)
+    (properties `((python2-variant . ,(delay python2-ipython))))))
+
+(define-public python2-ipython
+  (let ((ipython (package-with-python2 (strip-python2-variant python-ipython))))
+    (package
+      (inherit ipython)
+      ;; FIXME: add pyreadline once available.
+      (propagated-inputs
+       `(("python2-backports-shutil-get-terminal-size"
+          ,python2-backports-shutil-get-terminal-size)
+         ("python2-pathlib2" ,python2-pathlib2)
+         ,@(package-propagated-inputs ipython)))
+      (native-inputs
+       `(("python2-mock" ,python2-mock)
+         ,@(package-native-inputs ipython))))))
+
+(define-public python-urwid
+  (package
+    (name "python-urwid")
+    (version "2.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "urwid" version))
+       (sha256
+        (base32
+         "1g6cpicybvbananpjikmjk8npmjk4xvak1wjzji62wc600wkwkb4"))))
+    (build-system python-build-system)
+    (home-page "http://urwid.org")
+    (synopsis "Console user interface library for Python")
+    (description
+     "Urwid is a curses-based UI/widget library for Python.  It includes many
+features useful for text console applications.")
+    (license license:lgpl2.1+)))
+
+(define-public python2-urwid
+  (package-with-python2 python-urwid))
+
+(define-public python-urwidtrees
+  (package
+    (name "python-urwidtrees")
+    (version "1.0.2")
+    (source
+      (origin
+        (method url-fetch)
+        ;; package author intends on distributing via github rather than pypi:
+        ;; https://github.com/pazz/alot/issues/877#issuecomment-230173331
+        (uri (string-append "https://github.com/pazz/urwidtrees/archive/"
+                            version ".tar.gz"))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0d30lyd3s2a97rhqfax5w9ssqds2z6aydqx3c6j2c2lk3cb4ngvh"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; no tests
+    (propagated-inputs `(("python-urwid" ,python-urwid)))
+    (home-page "https://github.com/pazz/urwidtrees")
+    (synopsis "Tree widgets for urwid")
+    (description "Urwidtrees is a Widget Container API for the @code{urwid}
+toolkit.  Use it to build trees of widgets.")
+    (license license:gpl3+)))
+
+(define-public python2-urwidtrees
+  (package-with-python2 python-urwidtrees))
+
+(define-public python-ua-parser
+  (package
+    (name "python-ua-parser")
+    (version "0.8.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ua-parser" version))
+       (sha256
+        (base32
+         "1jwdf58rhchjzzrad405pviv0iq24xa2xmmmdgcm2c8s6b4wzfwp"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))                    ;no test suite in release
+    (native-inputs
+     `(("python-pyyaml" ,python-pyyaml)))
+    (home-page "https://github.com/ua-parser/uap-python")
+    (synopsis "User agent parser")
+    (description
+     "@code{ua-parser} is a Python port of Browserscope's user agent parser.")
+    (license license:asl2.0)))
+
+(define-public python2-ua-parser
+  (package-with-python2 python-ua-parser))
+
+(define-public python-user-agents
+  (package
+    (name "python-user-agents")
+    (version "1.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "user-agents" version))
+       (sha256
+        (base32
+         "0fc00cd3j8dahq1zzn8pkgfgd7lq37bp2scmdma2n1c049vicgb4"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))                  ;missing devices.json test file in release
+    (propagated-inputs
+     `(("python-ua-parser" ,python-ua-parser)))
+    (home-page "https://github.com/selwin/python-user-agents")
+    (synopsis "User Agent strings parsing library")
+  (description
+   "A library to identify devices (phones, tablets) and their capabilities by
+parsing (browser/HTTP) user agent strings.")
+  (license license:expat)))
+
+(define-public python2-user-agents
+  (package-with-python2 python-user-agents))
+
+(define-public python-dbus
+  (package
+    (name "python-dbus")
+    (version "1.2.8")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://dbus.freedesktop.org/releases/dbus-python/"
+                           "dbus-python-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0vvvjmiwnc9cjlks3gcdk43ap7llhlpz7cm1wbw0nc2yfsxjpwdb"))))
+    (build-system gnu-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (add-before
+          'check 'pre-check
+          (lambda _
+            ;; XXX: For the missing '/etc/machine-id'.
+            (substitute* "test/run-test.sh"
+              (("DBUS_FATAL_WARNINGS=1")
+               "DBUS_FATAL_WARNINGS=0"))
+            #t)))))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
+    (inputs
+     `(("python" ,python-wrapper)
+       ("dbus-glib" ,dbus-glib)))
+    (synopsis "Python bindings for D-bus")
+    (description "python-dbus provides bindings for libdbus, the reference
+implementation of D-Bus.")
+    (home-page "https://www.freedesktop.org/wiki/Software/DBusBindings/")
+    (license license:expat)))
+
+(define-public python2-dbus
+  (package (inherit python-dbus)
+    (name "python2-dbus")
+    (inputs `(("python" ,python-2)
+              ,@(alist-delete "python"
+                              (package-inputs python-dbus)
+                              equal?)))
+    ;; FIXME: on Python 2, the test_utf8 fails with:
+    ;; "ValueError: unichr() arg not in range(0x10000) (narrow Python build)"
+    (arguments `(#:tests? #f))))
+
+(define-public python-lxml
+  (package
+    (name "python-lxml")
+    (version "4.2.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "lxml" version))
+        (sha256
+         (base32
+          "0zw0y9hs0nflxhl9cs6ipwwh53szi3w2x06wl0k9cylyqac0cwin"))))
+    (build-system python-build-system)
+    (inputs
+      `(("libxml2" ,libxml2)
+        ("libxslt" ,libxslt)))
+    (home-page "http://lxml.de/")
+    (synopsis
+      "Python XML processing library")
+    (description
+      "The lxml XML toolkit is a Pythonic binding for the C libraries
+libxml2 and libxslt.")
+    (license license:bsd-3))) ; and a few more, see LICENSES.txt
+
+(define-public python2-lxml
+  (package-with-python2 python-lxml))
+
+;; beautifulsoup4 has a totally different namespace than 3.x,
+;; and pypi seems to put it under its own name, so I guess we should too
+(define-public python-beautifulsoup4
+  (package
+    (name "python-beautifulsoup4")
+    (version "4.6.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "beautifulsoup4" version))
+       (sha256
+        (base32
+         "041dhalzjciw6qyzzq7a2k4h1yvyk76xigp35hv5ibnn448ydy4h"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         ;; The Python 2 source is the definitive source of beautifulsoup4. We
+         ;; must use this conversion script when building with Python 3. The
+         ;; conversion script also runs the tests.
+         ;; For more information, see the file 'convert-py3k' in the source
+         ;; distribution.
+         (replace 'check
+           (lambda _ (zero? (system* "./convert-py3k")))))))
+    (home-page
+     "https://www.crummy.com/software/BeautifulSoup/bs4/")
+    (synopsis
+     "Python screen-scraping library")
+    (description
+     "Beautiful Soup is a Python library designed for rapidly setting up
+screen-scraping projects.  It offers Pythonic idioms for navigating,
+searching, and modifying a parse tree, providing a toolkit for
+dissecting a document and extracting what you need.  It automatically
+converts incoming documents to Unicode and outgoing documents to UTF-8.")
+    (license license:expat)
+    (properties `((python2-variant . ,(delay python2-beautifulsoup4))))))
+
+(define-public python2-beautifulsoup4
+  (package
+    (inherit (package-with-python2
+              (strip-python2-variant python-beautifulsoup4)))
+    (arguments `(#:python ,python-2))))
+
+(define-public python-netifaces
+  (package
+    (name "python-netifaces")
+    (version "0.10.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "netifaces" version))
+        (sha256
+          (base32
+            "1gccklrcplbbqh81g1mdgpa5y8na7kkf29cq2ka3f5a2fp5hyndx"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/al45tair/netifaces")
+    (synopsis
+      "Python module for portable network interface information")
+    (description
+      "Netifaces is a Python module providing information on network
+interfaces in an easy and portable manner.")
+    (license license:expat)))
+
+(define-public python2-netifaces
+  (package-with-python2 python-netifaces))
+
+(define-public python-networkx
+  (package
+    (name "python-networkx")
+    (version "2.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "networkx" version ".zip"))
+       (sha256
+        (base32 "12swxb15299v9vqjsq4z8rgh5sdhvpx497xwnhpnb0gynrx6zra5"))))
+    (build-system python-build-system)
+    ;; python-decorator is needed at runtime.
+    (propagated-inputs
+     `(("python-decorator" ,python-decorator)))
+    (native-inputs
+     `(("python-nose" ,python-nose)
+       ("unzip" ,unzip)))
+    (home-page "https://networkx.github.io/")
+    (synopsis "Python module for creating and manipulating graphs and networks")
+    (description
+      "NetworkX is a Python package for the creation, manipulation, and study
+of the structure, dynamics, and functions of complex networks.")
+    (license license:bsd-3)))
+
+(define-public python2-networkx
+  (package-with-python2 python-networkx))
+
+(define-public python-datrie
+  (package
+    (name "python-datrie")
+    (version "0.7.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "datrie" version))
+       (sha256
+        (base32
+         "08r0if7dry2q7p34gf7ffyrlnf4bdvnprxgydlfxgfnvq8f3f4bs"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases (modify-phases %standard-phases
+                  (add-before 'build 'cythonize
+                    (lambda _
+                      ;; Regenerate Cython classes to solve ABI issues with Python
+                      ;; 3.7.0.  See <https://github.com/pytries/datrie/issues/52>.
+                      (invoke "cython" "src/datrie.pyx" "src/cdatrie.pxd"
+                              "src/stdio_ext.pxd" "-a"))))))
+    (native-inputs
+     `(("python-cython" ,python-cython)
+       ("python-hypothesis" ,python-hypothesis)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://github.com/kmike/datrie")
+    (synopsis "Fast, efficiently stored trie for Python")
+    (description
+     "This package provides a fast, efficiently stored trie implementation for
+Python.")
+    (license license:lgpl2.1+)))
+
+(define-public snakemake
+  (package
+    (name "snakemake")
+    (version "5.2.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "snakemake" version))
+       (sha256
+        (base32 "0gj0xxgiq3mp9qyyrbfzldiaq1giliqw0in64nqiz7vx49myqj7z"))))
+    (build-system python-build-system)
+    (arguments
+     ;; TODO: Package missing test dependencies.
+     '(#:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         ;; For cluster execution Snakemake will call Python.  Since there is
+         ;; no suitable PYTHONPATH set, cluster execution will fail.  We fix
+         ;; this by calling the snakemake wrapper instead.
+         (add-after 'unpack 'call-wrapper-not-wrapped-snakemake
+           (lambda* (#:key outputs #:allow-other-keys)
+             (substitute* "snakemake/executors.py"
+               (("\\{sys.executable\\} -m snakemake")
+                (string-append (assoc-ref outputs "out")
+                               "/bin/snakemake")))
+             #t)))))
+    (propagated-inputs
+     `(("python-gitpython" ,python-gitpython)
+       ("python-wrapt" ,python-wrapt)
+       ("python-requests" ,python-requests)
+       ("python-appdirs" ,python-appdirs)
+       ("python-configargparse" ,python-configargparse)
+       ("python-datrie" ,python-datrie)
+       ("python-docutils" ,python-docutils)
+       ("python-jinja2" ,python-jinja2)
+       ("python-jsonschema" ,python-jsonschema)
+       ("python-networkx" ,python-networkx)
+       ("python-pyyaml" ,python-pyyaml)
+       ("python-ratelimiter" ,python-ratelimiter)))
+    (home-page "https://snakemake.readthedocs.io")
+    (synopsis "Python-based execution environment for make-like workflows")
+    (description
+      "Snakemake aims to reduce the complexity of creating workflows by
+providing a clean and modern domain specific specification language (DSL) in
+Python style, together with a fast and comfortable execution environment.")
+    (license license:expat)))
+
+;; This is currently needed for the pigx-* packages.
+(define-public snakemake-4
+  (package (inherit snakemake)
+    (version "4.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "snakemake" version))
+       (sha256
+        (base32 "0g0paia4z7w3srnqdmavq3hrb2x7qnpf81jx50njl0p7y4y0j8jv"))))
+    (propagated-inputs
+     `(("python-wrapt" ,python-wrapt)
+       ("python-requests" ,python-requests)
+       ("python-appdirs" ,python-appdirs)
+       ("python-configargparse" ,python-configargparse)
+       ("python-pyyaml" ,python-pyyaml)
+       ("python-ratelimiter" ,python-ratelimiter)))))
+
+(define-public python-pyqrcode
+  (package
+    (name "python-pyqrcode")
+    (version "1.2.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "PyQRCode" version))
+       (sha256
+        (base32
+         "1m9ln8k9v7dfbh1i81225hx5mdsh8mpf9g7r4wpbfmiyfcs7dgzx"))))
+    (build-system python-build-system)
+    (home-page
+     "https://github.com/mnooner256/pyqrcode")
+    (synopsis "QR code generator")
+    (description
+     "Pyqrcode is a QR code generator written purely in Python with
+SVG, EPS, PNG and terminal output.")
+    (license license:bsd-3)))
+
+(define-public python-seaborn
+  (package
+    (name "python-seaborn")
+    (version "0.9.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "seaborn" version))
+       (sha256
+        (base32 "0bqysi3fxfjl1866m5jq8z7mynhqbqnikim74dmzn8539iwkzj3n"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'start-xserver
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((xorg-server (assoc-ref inputs "xorg-server")))
+               ;; There must be a running X server and make check doesn't
+               ;; start one.  Therefore we must do it.
+               (system (format #f "~a/bin/Xvfb :1 &" xorg-server))
+               (setenv "DISPLAY" ":1")
+               #t)))
+         (replace 'check (lambda _ (invoke "pytest" "seaborn") #t)))))
+    (propagated-inputs
+     `(("python-pandas" ,python-pandas)
+       ("python-matplotlib" ,python-matplotlib)
+       ("python-numpy" ,python-numpy)
+       ("python-scipy" ,python-scipy)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("xorg-server" ,xorg-server)))
+    (home-page "http://stanford.edu/~mwaskom/software/seaborn/")
+    (synopsis "Statistical data visualization")
+    (description
+     "Seaborn is a library for making attractive and informative statistical
+graphics in Python.  It is built on top of matplotlib and tightly integrated
+with the PyData stack, including support for numpy and pandas data structures
+and statistical routines from scipy and statsmodels.")
+    (license license:bsd-3)))
+
+(define-public python2-seaborn
+  (package-with-python2 python-seaborn))
+
+(define-public python-mpmath
+  (package
+  (name "python-mpmath")
+  (version "0.19")
+  (source (origin
+            (method url-fetch)
+            (uri (string-append "http://mpmath.org/files/mpmath-"
+                                version ".tar.gz"))
+            (sha256
+             (base32
+              "08ijsr4ifrqv3cjc26mkw0dbvyygsa99in376hr4b96ddm1gdpb8"))))
+  (build-system python-build-system)
+  (arguments
+   '(#:phases
+     (modify-phases %standard-phases
+       (replace 'check
+         (lambda _
+           (zero?
+            (system* "python" "mpmath/tests/runtests.py" "-local")))))))
+  (home-page "http://mpmath.org")
+  (synopsis "Arbitrary-precision floating-point arithmetic in python")
+  (description
+    "@code{mpmath} can be used as an arbitrary-precision substitute for
+Python's float/complex types and math/cmath modules, but also does much
+more advanced mathematics.")
+  (license license:bsd-3)))
+
+(define-public python2-mpmath
+  (package-with-python2 python-mpmath))
+
+(define-public python-bigfloat
+  (package
+    (name "python-bigfloat")
+    (version "0.3.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "bigfloat" version))
+       (sha256
+        (base32 "0xd7q4l7v0f463diznjv4k9wlaks80pn9drdqmfifi7zx8qvybi6"))))
+    (build-system python-build-system)
+    (inputs
+     `(("mpfr" ,mpfr)))
+    (home-page "https://github.com/mdickinson/bigfloat")
+    (synopsis "Arbitrary precision floating-point arithmetic for Python")
+    (description
+     "This packages provides a Python interface to the MPFR library for
+multiprecision arithmetic.")
+    (license license:lgpl3+)))
+
+(define-public python2-bigfloat
+  (package-with-python2 python-bigfloat))
+
+(define-public python-sympy
+  (package
+    (name "python-sympy")
+    (version "1.1.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://github.com/sympy/sympy/releases/download/sympy-"
+             version "/sympy-" version ".tar.gz"))
+       (sha256
+        (base32 "190n29sppw7g8ihilc5451y7jlfcaw56crqiqbf1jff43dlmfnxc"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         ;; Run the core tests after installation.  By default it would run
+         ;; *all* tests, which take a very long time to complete and are known
+         ;; to be flaky.
+         (delete 'check)
+         (add-after 'install 'check
+           (lambda* (#:key outputs #:allow-other-keys)
+             (invoke "python3" "-c" "import sympy; sympy.test(\"/core\")")
+             #t)))))
+    (propagated-inputs
+     `(("python-mpmath" ,python-mpmath)))
+    (home-page "http://www.sympy.org/")
+    (synopsis "Python library for symbolic mathematics")
+    (description
+     "SymPy is a Python library for symbolic mathematics.  It aims to become a
+full-featured computer algebra system (CAS) while keeping the code as simple
+as possible in order to be comprehensible and easily extensible.")
+    (license license:bsd-3)))
+
+(define-public python2-sympy
+  (package
+    (inherit (package-with-python2 python-sympy))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         ;; Run the core tests after installation.  By default it would run
+         ;; *all* tests, which take a very long time to complete and are known
+         ;; to be flaky.
+         (delete 'check)
+         (add-after 'install 'check
+           (lambda* (#:key outputs #:allow-other-keys)
+             (invoke "python" "-c" "import sympy; sympy.test(\"/core\")")
+             #t)))))))
+
+(define-public python-q
+  (package
+    (name "python-q")
+    (version "2.6")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "q" version))
+       (sha256
+        (base32
+         "1mgfazh8fkizh6walra2zv885f3lcgr3nb02v1frfm4p8ddcy3yy"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/zestyping/q")
+    (synopsis "Quick-and-dirty debugging output for tired programmers")
+    (description
+     "q is a Python module for \"print\" style of debugging Python code.  It
+provides convenient short API for print out of values, tracebacks, and
+falling into the Python interpreter.")
+    (license license:asl2.0)))
+
+(define-public python2-q
+  (package-with-python2 python-q))
+
+(define-public python2-xlib
+  (package
+    (name "python2-xlib")
+    (version "0.14")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "mirror://sourceforge/python-xlib/python-xlib"
+                                  "/" version "/"
+                                  "python-xlib-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1sv0447j0rx8cgs3jhjl695p5pv13ihglcjlrrz1kq05lsvb0wa7"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2                         ;Python 2 only
+       #:tests? #f))                              ;no tests
+    (home-page "http://python-xlib.sourceforge.net/")
+    (synopsis "Python X11 client library")
+    (description
+     "The Python X Library is intended to be a fully functional X client
+library for Python programs.  It is useful to implement low-level X clients.
+It is written entirely in Python.")
+    (license license:gpl2+)))
+
+(define-public python-singledispatch
+  (package
+    (name "python-singledispatch")
+    (version "3.4.0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "singledispatch" version))
+       (sha256
+        (base32
+         "171b7ip0hsq5qm83np40h3phlr36ym18w0lay0a8v08kvy3sy1jv"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-six" ,python-six))) ; required for conversion, not at run-time
+    (home-page
+     "http://docs.python.org/3/library/functools.html#functools.singledispatch")
+    (synopsis "Backport of singledispatch feature from Python 3.4")
+    (description
+     "This library brings functools.singledispatch from Python 3.4 to Python
+2.6-3.3.")
+    (license license:expat)))
+
+(define-public python2-singledispatch
+  (package-with-python2 python-singledispatch))
+
+;; the python- version can be removed with python-3.5
+(define-public python-backports-abc
+  (package
+    (name "python-backports-abc")
+      (version "0.5")
+      (source
+        (origin
+          (method url-fetch)
+          (uri (pypi-uri "backports_abc" version))
+          (sha256
+           (base32
+            "1pkv8d1zxj5f9i227dxbjczncbv7ks7ywnjwyxfjagm02i2yafq3"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/cython/backports_abc")
+    (synopsis "Backport of additions to the 'collections.abc' module")
+    (description
+     "Python-backports-abc provides a backport of additions to the
+'collections.abc' module in Python-3.5.")
+    (license license:psfl)))
+
+(define-public python2-backports-abc
+  (package-with-python2 python-backports-abc))
+
+(define-public python-backports-csv
+  (package
+    (name "python-backports-csv")
+    (version "1.0.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "backports.csv" version))
+       (sha256
+        (base32
+         "1imzbrradkfn8s2m1qcimyn74dn1mz2p3j381jljn166rf2i6hlc"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/ryanhiebert/backports.csv")
+    (synopsis "Backport of Python 3's csv module for Python 2")
+    (description
+     "Provides a  backport of Python 3's @code{csv} module for parsing
+comma separated values.  The API of the @code{csv} module in Python 2
+is drastically different from the @code{csv} module in Python 3.
+This is due, for the most part, to the difference between str in
+Python 2 and Python 3.")
+    (license license:psfl)))
+
+(define-public python2-backports-csv
+  (package-with-python2 python-backports-csv))
+
+(define-public python2-backports-shutil-get-terminal-size
+  (package
+    (name "python2-backports-shutil-get-terminal-size")
+    (version "1.0.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "backports.shutil_get_terminal_size" version))
+       (sha256
+        (base32
+         "107cmn7g3jnbkp826zlj8rrj19fam301qvaqf0f3905f5217lgki"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (zero? (system* "py.test" "-v")))))))
+    (native-inputs
+     `(("python2-pytest" ,python2-pytest)))
+    (home-page "https://github.com/chrippa/backports.shutil_get_terminal_size")
+    (synopsis "Backport of Python 3.3's @code{shutil.get_terminal_size}")
+    (description
+     "This package provides a backport of the @code{get_terminal_size
+function} from Python 3.3's @code{shutil}.
+Unlike the original version it is written in pure Python rather than C,
+so it might be a tiny bit slower.")
+    (license license:expat)))
+
+(define-public python-waf
+  (package
+    (name "python-waf")
+    (version "2.0.11")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://waf.io/"
+                                  "waf-" version ".tar.bz2"))
+              (sha256
+               (base32
+                "13zrniwkmfqgsgzi9v5m1367fppp9yzrz6z2ny6hy8dmpb8mj4z4"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'build
+           (lambda _
+             (invoke "python" "waf-light" "configure" "build")))
+         (replace 'check
+           (lambda _
+             (invoke "python" "waf" "--version")))
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let ((out (assoc-ref outputs "out")))
+               (install-file "waf" (string-append out "/bin")))
+             #t))
+         ;; waf breaks when it is wrapped.
+         (delete 'wrap))))
+    (home-page "https://waf.io/")
+    (synopsis "Python-based build system")
+    (description
+     "Waf is a Python-based framework for configuring, compiling and installing
+applications.")
+    (license license:bsd-3)))
+
+(define-public python2-waf
+  (package-with-python2 python-waf))
+
+(define-public python-pyzmq
+  (package
+    (name "python-pyzmq")
+    (version "17.1.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pyzmq" version))
+       (sha256
+        (base32 "1pyxxrz60f88ffm0y6vpbx3q8jcr9ybz8fcilihwzwhh36n84ax7"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:configure-flags
+       (list (string-append "--zmq=" (assoc-ref %build-inputs "zeromq")))
+       ;; FIXME: You must build pyzmq with 'python setup.py build_ext
+       ;; --inplace' for 'python setup.py test' to work.
+       #:tests? #f))
+    (inputs
+     `(("zeromq" ,zeromq)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)
+       ("python-nose" ,python-nose)))
+    (home-page "https://github.com/zeromq/pyzmq")
+    (synopsis "Python bindings for 0MQ")
+    (description
+     "PyZMQ is the official Python binding for the ZeroMQ messaging library.")
+    (license license:bsd-4)))
+
+(define-public python2-pyzmq
+  (package-with-python2 python-pyzmq))
+
+(define-public python-pep8
+  ;; This package has been renamed to ‘pycodestyle’ and is no longer updated.
+  ;; Its last release (1.7.1) adds only a scary warning to this effect, breaking
+  ;; some dependents' test suites, and nothing more.
+  (package
+    (name "python-pep8")
+    (version "1.7.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pep8" version))
+        (sha256
+          (base32
+            "002rkl4lsn6x2mxmf8ar00l0m8i3mzrc6pnzz77blyksmpsxa4x1"))))
+    (build-system python-build-system)
+    (home-page "https://pep8.readthedocs.org/")
+    (synopsis "Python style guide checker")
+    (description
+     "This tools checks Python code against some of the style conventions in
+PEP 8.")
+    (license license:expat)))
+
+(define-public python2-pep8
+  (package-with-python2 python-pep8))
+
+(define-public python-pyflakes
+  (package
+    (name "python-pyflakes")
+    (version "2.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pyflakes" version))
+        (sha256
+          (base32
+            "0jba28czyvimdc72llms3f17swp3i8jdcabf5w0j00adfbn64xls"))))
+    (build-system python-build-system)
+    (home-page
+      "https://github.com/pyflakes/pyflakes")
+    (synopsis "Passive checker of Python programs")
+    (description
+      "Pyflakes statically checks Python source code for common errors.")
+    (license license:expat)))
+
+(define-public python2-pyflakes
+  (package-with-python2 python-pyflakes))
+
+(define-public python-mccabe
+  (package
+    (name "python-mccabe")
+    (version "0.6.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "mccabe" version))
+        (sha256
+          (base32
+            "07w3p1qm44hgxf3vvwz84kswpsx6s7kvaibzrsx5dzm0hli1i3fx"))))
+    (build-system python-build-system)
+    (native-inputs
+      `(("python-pytest" ,python-pytest-bootstrap)
+        ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://github.com/flintwork/mccabe")
+    (synopsis "McCabe checker, plugin for flake8")
+    (description
+      "This package provides a Flake8 plug-in to compute the McCabe cyclomatic
+complexity of Python source code.")
+    (license license:expat)))
+
+(define-public python2-mccabe
+  (package-with-python2 python-mccabe))
+
+(define-public python-mccabe-0.2.1
+  (package (inherit python-mccabe)
+    (version "0.2.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "mccabe" version))
+        (sha256
+          (base32
+            "0fi4a81kr5bcv5p4xgibqr595hyj5dafkqgsmfk96mfy8w71fajs"))))))
+
+(define-public python2-mccabe-0.2.1
+  (package-with-python2 python-mccabe-0.2.1))
+
+;; Flake8 2.4.1 requires an older version of pep8.
+;; This should be removed ASAP.
+(define-public python-pep8-1.5.7
+  (package (inherit python-pep8)
+    (version "1.5.7")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (string-append
+               "https://pypi.python.org/packages/source/p/pep8/pep8-"
+               version
+               ".tar.gz"))
+        (sha256
+          (base32
+           "12b9bbdbwnspxgak14xg58c130x2n0blxzlms5jn2dszn8qj3d0m"))))
+    (arguments
+     ;; XXX Tests not compatible with Python 3.5.
+     '(#:tests? #f))))
+
+(define-public python2-pep8-1.5.7
+  (package-with-python2 python-pep8-1.5.7))
+
+;; Flake8 2.4.1 requires an older version of pyflakes.
+;; This should be removed ASAP.
+(define-public python-pyflakes-0.8.1
+  (package (inherit python-pyflakes)
+    (version "0.8.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (string-append
+               "https://pypi.python.org/packages/source/p/pyflakes/pyflakes-"
+               version
+               ".tar.gz"))
+        (sha256
+          (base32
+           "0sbpq6pqm1i9wqi41mlfrsc5rk92jv4mskvlyxmnhlbdnc80ma1z"))))
+    (arguments
+     ;; XXX Tests not compatible with Python 3.5.
+     '(#:tests? #f))))
+
+(define-public python2-pyflakes-0.8.1
+  (package-with-python2 python-pyflakes-0.8.1))
+
+;; This package is used by hypothesis which has thousands of dependent packages.
+;; FIXME: Consolidate this with "python-flake8" below in the next rebuild cycle.
+(define-public python-flake8-3.5
+  (package
+    (name "python-flake8")
+    (version "3.5.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "flake8" version))
+        (sha256
+          (base32
+            "184b33grvvjmiwlv9kyd7yng9qv5ld24154j70z332xxg9gjclvj"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         ;; Two errors don't seem to have assigned codes.
+         (add-after 'unpack 'delete-broken-test
+           (lambda _ (delete-file "tests/unit/test_pyflakes_codes.py") #t))
+         (add-after 'unpack 'fix-problem-with-pycodestyle
+           (lambda _
+             ;; See https://gitlab.com/pycqa/flake8/merge_requests/230
+             ;; This should no longer be needed with the next release.
+             (substitute* "setup.py"
+               (("PEP8_PLUGIN\\('break_around_binary_operator'\\),")
+                "PEP8_PLUGIN('break_after_binary_operator'),\
+PEP8_PLUGIN('break_before_binary_operator'),"))
+             #t))
+         (delete 'check)
+         (add-after 'install 'check
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (add-installed-pythonpath inputs outputs)
+             (invoke "pytest" "-v")
+             #t)))))
+    (propagated-inputs
+     `(("python-pycodestyle" ,python-pycodestyle)
+       ("python-pyflakes" ,python-pyflakes)
+       ("python-mccabe" ,python-mccabe)))
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-pytest" ,python-pytest-bootstrap)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://gitlab.com/pycqa/flake8")
+    (synopsis
+      "The modular source code checker: pep8, pyflakes and co")
+    (description
+      "Flake8 is a wrapper around PyFlakes, pep8 and python-mccabe.")
+    (properties `((python2-variant . ,(delay python2-flake8-3.5))))
+    (license license:expat)))
+
+(define-public python2-flake8-3.5
+  (let ((base (package-with-python2 (strip-python2-variant python-flake8-3.5))))
+    (package (inherit base)
+      (propagated-inputs
+       `(("python2-configparser" ,python2-configparser)
+         ("python2-enum34" ,python2-enum34)
+          ,@(package-propagated-inputs base))))))
+
+;; Version 3.5.0 has compatibility issues with Pyflakes 2.0, so we need
+;; this newer version.  Keep it as a separate variable for now to avoid
+;; rebuilding "python-hypothesis"; this should be removed in the next
+;; rebuild cycle.
+(define-public python-flake8
+  (package
+    (inherit python-flake8-3.5)
+    (version "3.6.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "flake8" version))
+              (sha256
+               (base32
+                "0w0nprx22rbvrrkbfx9v5jc5gskbm08g219l7r8wai8zfswgadba"))))
+    (arguments
+     (substitute-keyword-arguments (package-arguments python-flake8-3.5)
+       ((#:phases phases)
+        `(modify-phases ,phases
+           (delete 'delete-broken-test)
+           (delete 'fix-problem-with-pycodestyle)))))
+    (properties `((python2-variant . ,(delay python2-flake8))))))
+
+(define-public python2-flake8
+  (let ((base (package-with-python2 (strip-python2-variant python-flake8))))
+    (package (inherit base)
+             (propagated-inputs
+              (package-propagated-inputs python2-flake8-3.5)))))
+
+;; python-hacking requires flake8 <2.6.0.
+(define-public python-flake8-2.5
+  (package
+    (inherit python-flake8)
+    (version "2.5.5")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "flake8" version))
+              (sha256
+               (base32
+                "1snylqwbmrylbx3r1wpz8ggk98f6bcag4441ag8mm2l7wyn58sij"))))
+    (propagated-inputs
+     `(("python-pep8" ,python-pep8)
+       ,@(package-propagated-inputs python-flake8)))
+    (properties `((python2-variant . ,(delay python2-flake8-2.5))))))
+
+(define-public python2-flake8-2.5
+  (package
+    (inherit python2-flake8)
+    (version (package-version python-flake8-2.5))
+    (source (origin
+              (inherit (package-source python-flake8-2.5))))
+    (propagated-inputs
+     `(("python2-pep8" ,python2-pep8)
+       ,@(package-propagated-inputs python2-flake8)))))
+
+(define-public python-flake8-polyfill
+  (package
+    (name "python-flake8-polyfill")
+    (version "1.0.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "flake8-polyfill" version))
+       (sha256
+        (base32
+         "1nlf1mkqw856vi6782qcglqhaacb23khk9wkcgn55npnjxshhjz4"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (setenv "PYTHONPATH"
+                     (string-append (getcwd) "/build/lib:"
+                                    (getenv "PYTHONPATH")))
+             (zero? (system* "py.test" "-v")))))))
+    (native-inputs
+     `(("python-flake8" ,python-flake8)
+       ("python-mock" ,python-mock)
+       ("python-pep8" ,python-pep8)
+       ("python-pycodestyle" ,python-pycodestyle)
+       ("python-pytest" ,python-pytest)))
+    (home-page "https://gitlab.com/pycqa/flake8-polyfill")
+    (synopsis "Polyfill package for Flake8 plugins")
+    (description
+     "This package that provides some compatibility helpers for Flake8
+plugins that intend to support Flake8 2.x and 3.x simultaneously.")
+    (license license:expat)))
+
+(define-public python2-flake8-polyfill
+  (package-with-python2 python-flake8-polyfill))
+
+(define-public python-mistune
+  (package
+    (name "python-mistune")
+    (version "0.8.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "mistune" version))
+       (sha256
+        (base32
+         "0vkmsh0x480rni51lhyvigfdf06b9247z868pk3bal1wnnfl58sr"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-nose" ,python-nose)
+       ("python-cython" ,python-cython)))
+    (home-page "https://github.com/lepture/mistune")
+    (synopsis "Markdown parser in pure Python")
+    (description "This package provides a fast markdown parser in pure
+Python.")
+    (license license:bsd-3)))
+
+(define-public python2-mistune
+  (package-with-python2 python-mistune))
+
+(define-public python-markdown
+  (package
+    (name "python-markdown")
+    (version "3.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Markdown" version))
+       (sha256
+        (base32
+         "0z6v8649sr434d5r5zmrhydka7v7f9yas4bwcgkcs0650jdhybnh"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-nose" ,python-nose)
+       ("python-pyyaml" ,python-pyyaml)))
+    (home-page "https://python-markdown.github.io/")
+    (synopsis "Python implementation of Markdown")
+    (description
+     "This package provides a Python implementation of John Gruber's
+Markdown.  The library features international input, various Markdown
+extensions, and several HTML output formats.  A command line wrapper
+markdown_py is also provided to convert Markdown files to HTML.")
+    (license license:bsd-3)))
+
+(define-public python2-markdown
+  (package-with-python2 python-markdown))
+
+(define-public python-ptyprocess
+  (package
+    (name "python-ptyprocess")
+    (version "0.5.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ptyprocess" version))
+       (sha256
+        (base32
+         "0ra31k10v3629xq0kdn8lwmfbi97anmk48r03yvh7mks0kq96hg6"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-nose" ,python-nose)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+                  (lambda _
+                    (zero? (system* "nosetests")))))))
+    (home-page "https://github.com/pexpect/ptyprocess")
+    (synopsis "Run a subprocess in a pseudo terminal")
+    (description
+     "This package provides a Python library used to launch a subprocess in a
+pseudo terminal (pty), and interact with both the process and its pty.")
+    (license license:isc)))
+
+(define-public python2-ptyprocess
+  (package-with-python2 python-ptyprocess))
+
+(define-public python-cram
+  (package
+    (name "python-cram")
+    (version "0.7")
+    (home-page "https://bitheap.org/cram/")
+    (source (origin
+              (method url-fetch)
+              (uri (list (string-append home-page "cram-"
+                                        version ".tar.gz")
+                         (pypi-uri "cram" version)))
+              (sha256
+               (base32
+                "0bvz6fwdi55rkrz3f50zsy35gvvwhlppki2yml5bj5ffy9d499vx"))))
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-source
+           (lambda _
+             (substitute* (find-files "cram" ".*\\.py$")
+               ;; Replace default shell path.
+               (("/bin/sh") (which "sh")))
+             (substitute* (find-files "tests" ".*\\.t$")
+               (("md5") "md5sum")
+               (("/bin/bash") (which "bash"))
+               (("/bin/sh") (which "sh")))
+             (substitute* "cram/_test.py"
+               ;; This hack works around a bug triggered by substituting
+               ;; the /bin/sh paths. "tests/usage.t" compares the output of
+               ;; "cram -h", which breaks the output at 80 characters. This
+               ;; causes the line showing the default shell to break into two
+               ;; lines, but the test expects a single line...
+               (("env\\['COLUMNS'\\] = '80'")
+                "env['COLUMNS'] = '160'"))
+             #t))
+         (delete 'check)
+         (add-after 'install 'check
+           ;; The test phase uses the built library and executable.
+           ;; It's easier to run it after install since the build
+           ;; directory contains version-specific PATH.
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (add-installed-pythonpath inputs outputs)
+             (setenv "PATH" (string-append (getenv "PATH") ":"
+                                           (assoc-ref outputs "out") "/bin"))
+             (zero? (system* "make" "test")))))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-coverage" ,python-coverage)
+       ("which" ,which)))
+    (synopsis "Simple testing framework for command line applications")
+    (description
+     "Cram is a functional testing framework for command line applications.
+Cram tests look like snippets of interactive shell sessions.  Cram runs each
+command and compares the command output in the test with the command’s actual
+output.")
+    (license license:gpl2+)))
+
+(define-public python2-cram
+  (package-with-python2 python-cram))
+
+(define-public python-straight-plugin
+  (package
+    (name "python-straight-plugin")
+    (version "1.4.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "straight.plugin" version))
+       (sha256
+        (base32
+         "069pjll4383p4kkgvcc40hgyvf79j2wdbpgwz77yigzxksh1gj62"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/ironfroggy/straight.plugin")
+    (synopsis "Simple namespaced plugin facility")
+    (description "Straight Plugin provides a type of plugin you can create from
+almost any existing Python modules, and an easy way for outside developers to
+add functionality and customization to your projects with their own plugins.")
+    (license license:expat)))
+
+(define-public python2-straight-plugin
+  (package-with-python2 python-straight-plugin))
+
+(define-public python-fonttools
+  (package
+    (name "python-fonttools")
+    (version "3.28.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "fonttools" version ".zip"))
+              (sha256
+               (base32
+                "0vsvjhidpb5kywpjgz1j3fywzkddxkb0afqai18qa3h6lqjyxwpb"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("unzip" ,unzip)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://github.com/behdad/fonttools")
+    (synopsis "Tools to manipulate font files")
+    (description
+     "FontTools/TTX is a library to manipulate font files from Python.  It
+supports reading and writing of TrueType/OpenType fonts, reading and writing
+of AFM files, reading (and partially writing) of PS Type 1 fonts.  The package
+also contains a tool called “TTX” which converts TrueType/OpenType fonts to and
+from an XML-based format.")
+    (license license:expat)))
+
+(define-public python2-fonttools
+  (package-with-python2 python-fonttools))
+
+(define-public python-ly
+  (package
+    (name "python-ly")
+    (version "0.9.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri name version))
+       (sha256
+        (base32
+         "0x98dv7p8mg26p4816yy8hz4f34zf6hpnnfmr56msgh9jnsm2qfl"))))
+    (build-system python-build-system)
+    (arguments
+     ;; FIXME: Some tests need network access.
+     '(#:tests? #f))
+    (synopsis "Tool and library for manipulating LilyPond files")
+    (description "This package provides a Python library to parse, manipulate
+or create documents in LilyPond format.  A command line program ly is also
+provided that can be used to do various manipulations with LilyPond files.")
+    (home-page "https://pypi.python.org/pypi/python-ly")
+    (license license:gpl2+)))
+
+(define-public python-appdirs
+  (package
+    (name "python-appdirs")
+    (version "1.4.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "appdirs" version))
+        (sha256
+          (base32
+            "14id6wxi12lgyw0mg3bcfnf888ad07jz9yj46gfzhn186z8rcn4y"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/ActiveState/appdirs")
+    (synopsis
+      "Determine platform-specific dirs, e.g. a \"user data dir\"")
+    (description
+      "This module provides a portable way of finding out where user data
+should be stored on various operating systems.")
+    (license license:expat)))
+
+(define-public python2-appdirs
+  (package-with-python2 python-appdirs))
+
+(define-public python-llfuse
+  (package
+    (name "python-llfuse")
+    (version "1.3.5")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "llfuse" version ".tar.bz2"))
+              (sha256
+               (base32
+                "1n7a90jww3ly49fm7x27m3xw3la3qfrnykcakga654g6kcyjlhbf"))))
+    (build-system python-build-system)
+    (inputs
+     `(("fuse" ,fuse)
+       ("attr" ,attr)))
+    (native-inputs
+     `(("pkg-config" ,pkg-config)))
+    (synopsis "Python bindings for FUSE")
+    (description
+     "Python-LLFUSE is a set of Python bindings for the low level FUSE API.")
+    (home-page "https://bitbucket.org/nikratio/python-llfuse/")
+    (license license:lgpl2.0+)
+    (properties `((python2-variant . ,(delay python2-llfuse))))))
+
+(define-public python2-llfuse
+  (package (inherit (package-with-python2
+                 (strip-python2-variant python-llfuse)))
+    (propagated-inputs `(("python2-contextlib2" ,python2-contextlib2)))))
+
+;; For attic-0.16
+(define-public python-llfuse-0.41
+  (package (inherit python-llfuse)
+    (version "0.41.1")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://bitbucket.org/nikratio/python-llfuse/downloads/"
+                    "llfuse-" version ".tar.bz2"))
+              (sha256
+               (base32
+                "1imlqw9b73086y97izr036f58pgc5akv4ihc2rrf8j5h75jbrlaa"))))
+    ;; Python-LLFUSE < 0.42 includes underscore.js, which is MIT (expat)
+    ;; licensed.  The rest of the package is licensed under LGPL2.0 or later.
+    (license (list license:expat license:lgpl2.0+))))
+
+(define-public python-msgpack
+  (package
+    (name "python-msgpack")
+    (version "0.5.6")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "msgpack" version))
+              (sha256
+               (base32
+                "1hz2dba1nvvn52afg34liijsm7kn65cmn06dl0xbwld6bb4cis0f"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:modules ((guix build utils)
+                  (guix build python-build-system)
+                  (ice-9 ftw)
+                  (srfi srfi-1)
+                  (srfi srfi-26))
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (let ((cwd (getcwd)))
+               (setenv "PYTHONPATH"
+                       (string-append cwd "/build/"
+                                      (find (cut string-prefix? "lib" <>)
+                                            (scandir (string-append cwd "/build")))
+                                      ":"
+                                      (getenv "PYTHONPATH")))
+             (invoke "pytest" "-v" "test")))))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (synopsis "MessagePack (de)serializer")
+    (description "MessagePack is a fast, compact binary serialization format,
+suitable for similar data to JSON.  This package provides CPython bindings for
+reading and writing MessagePack data.")
+    (home-page "https://pypi.python.org/pypi/msgpack/")
+    (license license:asl2.0)))
+
+;; This msgpack library's name changed from "python-msgpack" to "msgpack" with
+;; release 0.5. Some packages like borg still call it by the old name for now.
+;; <https://bugs.gnu.org/30662>
+(define-public python-msgpack-transitional
+  (package
+    (inherit python-msgpack)
+    (name "python-msgpack-transitional")
+    (arguments
+     (substitute-keyword-arguments (package-arguments python-msgpack)
+       ((#:phases phases)
+        `(modify-phases ,phases
+           (add-after 'unpack 'configure-transitional
+             (lambda _
+               ;; Keep using the old name.
+               (substitute* "setup.py"
+                 (("TRANSITIONAL = False")
+                   "TRANSITIONAL = 1"))
+               #t))))))))
+
+(define-public python2-msgpack
+  (package-with-python2 python-msgpack))
+
+(define-public python-netaddr
+  (package
+    (name "python-netaddr")
+    (version "0.7.19")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "netaddr" version))
+       (sha256
+         (base32
+          "1zdfadvpq4lmcqzr383gywxn4xyn355kj1n3lk9q2l03vmyfrbiq"))))
+    (build-system python-build-system)
+    (arguments `(#:tests? #f)) ;; No tests.
+    (home-page "https://github.com/drkjam/netaddr/")
+    (synopsis "Pythonic manipulation of  network addresses")
+    (description
+      "A Python library for representing and manipulating IPv4, IPv6, CIDR, EUI
+and MAC network addresses.")
+    (license license:bsd-3)))
+
+(define-public python2-netaddr
+  (package-with-python2 python-netaddr))
+
+(define-public python-wrapt
+  (package
+    (name "python-wrapt")
+    (version "1.10.11")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "wrapt" version))
+        (sha256
+          (base32
+            "1ip3dwib39xhp79kblskgvz3fjzcwxgx3fs3ahdixhpjg7a61mfl"))))
+    (build-system python-build-system)
+    (arguments
+     ;; Tests are not included in the tarball, they are only available in the
+     ;; git repository.
+     `(#:tests? #f))
+    (home-page "https://github.com/GrahamDumpleton/wrapt")
+    (synopsis "Module for decorators, wrappers and monkey patching")
+    (description
+      "The aim of the wrapt module is to provide a transparent object proxy for
+  Python, which can be used as the basis for the construction of function
+  wrappers and decorator functions.")
+    (license license:bsd-2)))
+
+(define-public python2-wrapt
+  (package-with-python2 python-wrapt))
+
+(define-public python-xlrd
+  (package
+    (name "python-xlrd")
+    (version "1.0.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "xlrd" version))
+              (sha256
+               (base32
+                "0s8hjiz01vbhy85xalrz0qlsmd9ypf36zjqrf97hh984spapvy0g"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         ;; Current test in setup.py does not work as of 1.0.0, so use nose to
+         ;; run tests instead for now.
+         (replace 'check (lambda _ (zero? (system* "nosetests")))))))
+    (native-inputs `(("python-nose"       ,python-nose)))
+    (home-page "http://www.python-excel.org/")
+    (synopsis "Library for extracting data from Excel files")
+    (description "This packages provides a library to extract data from
+spreadsheets using Microsoft Excel proprietary file formats @samp{.xls} and
+@samp{.xlsx} (versions 2.0 onwards).  It has support for Excel dates and is
+Unicode-aware.  It is not intended as an end-user tool.")
+    (license license:bsd-3)))
+
+(define-public python2-xlrd
+  (package-with-python2 python-xlrd))
+
+(define-public python-prettytable
+  (package
+    (name "python-prettytable")
+    (version "0.7.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://pypi.python.org/packages/source/P/PrettyTable/"
+             "prettytable-" version ".tar.bz2"))
+       (sha256
+        (base32
+         "0diwsicwmiq2cpzpxri7cyl5fmsvicafw6nfqf6p6p322dji2g45"))))
+    (build-system python-build-system)
+    (home-page "http://code.google.com/p/prettytable/")
+    (synopsis "Display tabular data in an ASCII table format")
+    (description
+      "A library designed to represent tabular data in visually appealing ASCII
+tables.  PrettyTable allows for selection of which columns are to be printed,
+independent alignment of columns (left or right justified or centred) and
+printing of sub-tables by specifying a row range.")
+    (license license:bsd-3)))
+
+(define-public python2-prettytable
+  (package-with-python2 python-prettytable))
+
+(define-public python-tables
+  (package
+    (name "python-tables")
+    (version "3.4.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "tables" version))
+       (sha256
+        (base32
+         "0affz7k8babh8wdmsgrz5jxrd569by2w8ffimcxs9wiaf5rw1idx"))
+       (modules '((guix build utils)))
+       (snippet
+        '(begin
+           ;; Remove pre-compiled .pyc files from source.
+           (for-each delete-file-recursively
+                     (find-files "." "__pycache__" #:directories? #t))
+           (for-each delete-file (find-files "." "\\.pyc$"))
+           #t))))
+    (build-system python-build-system)
+    (arguments
+     `(;; FIXME: python-build-system does not pass configure-flags to "build"
+       ;; or "check", so we must override the build and check phases.
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'use-gcc
+           (lambda _
+             (substitute* "setup.py"
+               (("compiler = new_compiler\\(\\)" line)
+                (string-append line
+                               "\ncompiler.set_executables(compiler='gcc',"
+                               "compiler_so='gcc',"
+                               "linker_exe='gcc',"
+                               "linker_so='gcc -shared')")))
+             #t))
+         (replace 'build
+           (lambda* (#:key inputs #:allow-other-keys)
+             (zero? (system* "python" "setup.py" "build"
+                             (string-append "--hdf5="
+                                            (assoc-ref inputs "hdf5"))))))
+         (replace 'check
+           (lambda* (#:key inputs #:allow-other-keys)
+             (zero? (system* "python" "setup.py" "check"
+                             (string-append "--hdf5="
+                                            (assoc-ref inputs "hdf5")))))))))
+    (propagated-inputs
+     `(("python-numexpr" ,python-numexpr)
+       ("python-numpy" ,python-numpy)))
+    (native-inputs
+     `(("python-cython" ,python-cython)
+       ("pkg-config" ,pkg-config)))
+    (inputs
+     `(("hdf5" ,hdf5)
+       ("bzip2" ,bzip2)
+       ("zlib" ,zlib)))
+    (home-page "http://www.pytables.org/")
+    (synopsis "Hierarchical datasets for Python")
+    (description "PyTables is a package for managing hierarchical datasets and
+designed to efficiently cope with extremely large amounts of data.")
+    (license license:bsd-3)))
+
+(define-public python2-tables
+  (package-with-python2 python-tables))
+
+(define-public python-pyasn1
+  (package
+    (name "python-pyasn1")
+    (version "0.4.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pyasn1" version))
+       (sha256
+        (base32
+         "1z5h38anjzzrxpraa9iq9llffyx2zs8gx0q6dc1g029miwnn50gv"))))
+    (build-system python-build-system)
+    (home-page "http://pyasn1.sourceforge.net/")
+    (synopsis "ASN.1 types and codecs")
+    (description
+     "This is an implementation of ASN.1 types and codecs in Python.  It is
+suitable for a wide range of protocols based on the ASN.1 specification.")
+    (license license:bsd-2)))
+
+(define-public python2-pyasn1
+  (package-with-python2 python-pyasn1))
+
+(define-public python-pyasn1-modules
+  (package
+    (name "python-pyasn1-modules")
+    (version "0.2.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pyasn1-modules" version))
+        (sha256
+         (base32
+          "0ivm850yi7ajjbi8j115qpsj95bgxdsx48nbjzg0zip788c3xkx0"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-pyasn1" ,python-pyasn1)))
+    (home-page "https://sourceforge.net/projects/pyasn1/")
+    (synopsis "ASN.1 codec implementations")
+    (description
+     "Pyasn1-modules is a collection of Python modules providing ASN.1 types and
+implementations of ASN.1-based codecs and protocols.")
+    (license license:bsd-3)))
+
+(define-public python2-pyasn1-modules
+  (package-with-python2 python-pyasn1-modules))
+
+(define-public python-ipaddress
+  (package
+    (name "python-ipaddress")
+    (version "1.0.22")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "ipaddress" version))
+              (sha256
+               (base32
+                "0b570bm6xqpjwqis15pvdy6lyvvzfndjvkynilcddjj5x98wfimi"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/phihag/ipaddress")
+    (synopsis "IP address manipulation library")
+    (description
+      "This package provides a fast, lightweight IPv4/IPv6 manipulation library
+ in Python.  This library is used to create, poke at, and manipulate IPv4 and
+ IPv6 addresses and networks.  This is a port of the Python 3.3 ipaddress
+ module to older versions of Python.")
+    (license license:psfl)))
+
+(define-public python2-ipaddress
+  (package-with-python2 python-ipaddress))
+
+(define-public python2-ipaddr
+  (package
+    (name "python2-ipaddr")
+    (version "2.1.11")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ipaddr" version))
+       (sha256
+        (base32 "1dwq3ngsapjc93fw61rp17fvzggmab5x1drjzvd4y4q0i255nm8v"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2                         ;version 2 only
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda* _
+             (zero? (system* "python" "ipaddr_test.py")))))))
+    (home-page "https://github.com/google/ipaddr-py")
+    (synopsis "IP address manipulation library")
+    (description
+     "Ipaddr is a Python@tie{}2 library for creating and manupilating IPv4 and
+IPv6 addresses and networks.
+
+For new implementations you may prefer to use the standard module
+@code{ipaddress}, which was introduced in Python 3.3 and backported to older
+versions of Python.")
+    (license license:asl2.0)))
+
+(define-public python-idna
+  (package
+    (name "python-idna")
+    (version "2.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "idna" version))
+       (sha256
+        (base32
+         "05jam7d31767dr12x0rbvvs8lxnpb1mhdb2zdlfxgh83z6k3hjk8"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/kjd/idna")
+    (synopsis "Internationalized domain names in applications")
+    (description
+     "This is a library to support the Internationalised Domain Names in
+Applications (IDNA) protocol as specified in RFC 5891.  This version of the
+protocol is often referred to as “IDNA2008” and can produce different results
+from the earlier standard from 2003.  The library is also intended to act as a
+suitable drop-in replacement for the “encodings.idna” module that comes with
+the Python standard library but currently only supports the older 2003
+specification.")
+    (license license:bsd-4)))
+
+(define-public python2-idna
+  (package-with-python2 python-idna))
+
+(define-public python-idna-ssl
+  (package
+    (name "python-idna-ssl")
+    (version "1.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "idna-ssl" version))
+       (sha256
+        (base32
+         "0ydrc8hpg9mdr5hqq1lqfsfbn6sjq69slwpfrnlrm3k0phqg14qj"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))          ;circular dependency with python-aiohttp
+    (home-page "https://github.com/aio-libs/idna-ssl")
+    (synopsis "Patch @code{ssl.match_hostname} for Unicode(idna) domains support")
+    (description "Patch @code{ssl.match_hostname} for Unicode(idna)
+domains support.")
+    (license license:expat)))
+
+(define-public python-pretend
+  (package
+    (name "python-pretend")
+    (version "1.0.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://pypi.python.org/packages/source/p/"
+                           "pretend/pretend-" version ".tar.gz"))
+       (sha256
+        (base32
+         "040vm94lcbscg5p81g1icmwwwa2jm7wrd1ybmxnv1sz8rl8bh3n9"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/alex/pretend")
+    (synopsis "Library for stubbing in Python")
+    (description
+     "Pretend is a library to make stubbing with Python easier.  Stubbing is a
+technique for writing tests.  You may hear the term mixed up with mocks,
+fakes, or doubles.  Basically, a stub is an object that returns pre-canned
+responses, rather than doing any computation.")
+    (license license:bsd-3)))
+
+(define-public python2-pretend
+  (package-with-python2 python-pretend))
+
+(define-public python-pip
+  (package
+    (name "python-pip")
+    (version "18.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pip" version))
+       (sha256
+        (base32
+         "188fclay154s520n43s7cxxlhdaiysvxf19zk8vr1xbyjyyr58n0"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f))          ; there are no tests in the pypi archive.
+    (home-page "https://pip.pypa.io/")
+    (synopsis "Package manager for Python software")
+    (description
+     "Pip is a package manager for Python software, that finds packages on the
+Python Package Index (PyPI).")
+    (license license:expat)))
+
+(define-public python2-pip
+  (package-with-python2 python-pip))
+
+(define-public python-tlsh
+  (package
+    (name "python-tlsh")
+    (version "3.4.5")
+    (home-page "https://github.com/trendmicro/tlsh")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append "https://github.com/trendmicro/tlsh/archive/v"
+                                  version ".tar.gz"))
+              (sha256
+               (base32
+                "1x1vahd4zg5kpyr9h9hs3fvh460p25rjy4cclwdnbbw8x3vc30q3"))
+              (file-name (string-append name "-" version ".tar.gz"))))
+    (build-system cmake-build-system)
+    (arguments
+     '(#:out-of-source? #f
+       #:phases (modify-phases %standard-phases
+                  (replace
+                   'install
+                   (lambda* (#:key outputs #:allow-other-keys)
+                     ;; Build and install the Python bindings.  The underlying
+                     ;; C++ library is apparently not meant to be installed.
+                     (let ((out (assoc-ref outputs "out")))
+                       (with-directory-excursion "py_ext"
+                         (and (system* "python" "setup.py" "build")
+                              (system* "python" "setup.py" "install"
+                                       (string-append "--prefix=" out))))))))))
+    (inputs `(("python" ,python-wrapper)))        ;for the bindings
+    (synopsis "Fuzzy matching library for Python")
+    (description
+     "Trend Micro Locality Sensitive Hash (TLSH) is a fuzzy matching library.
+Given a byte stream with a minimum length of 256 bytes, TLSH generates a hash
+value which can be used for similarity comparisons.  Similar objects have
+similar hash values, which allows for the detection of similar objects by
+comparing their hash values.  The byte stream should have a sufficient amount
+of complexity; for example, a byte stream of identical bytes will not generate
+a hash value.")
+    (license license:asl2.0)))
+
+(define-public python2-tlsh
+  (package
+    (inherit python-tlsh)
+    (name "python2-tlsh")
+    (inputs `(("python" ,python-2)))))
+
+(define-public python-termcolor
+  (package
+    (name "python-termcolor")
+    (version "1.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "termcolor" version))
+       (sha256
+        (base32
+         "0fv1vq14rpqwgazxg4981904lfyp84mnammw7y046491cv76jv8x"))))
+    (build-system python-build-system)
+    (arguments
+     ;; There are no tests.
+     `(#:tests? #f))
+    (home-page "https://pypi.python.org/pypi/termcolor")
+    (synopsis "ANSII Color formatting for terminal output")
+    (description
+     "This package provides ANSII Color formatting for output in terminals.")
+    (license license:expat)))
+
+(define-public python2-termcolor
+  (package-with-python2 python-termcolor))
+
+(define-public python-libarchive-c
+  (package
+    (name "python-libarchive-c")
+    (version "2.8")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "libarchive-c" version))
+              (sha256
+               (base32
+                "0qg0v1s9c1xdk9philhnv8k6c6nicvnvfwlc0j9srg90jmdlvm06"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases (modify-phases %standard-phases
+                  (add-before
+                   'build 'reference-libarchive
+                   (lambda* (#:key inputs #:allow-other-keys)
+                     ;; Retain the absolute file name of libarchive.so.
+                     (let ((libarchive (assoc-ref inputs "libarchive")))
+                       (substitute* "libarchive/ffi.py"
+                         (("find_library\\('archive'\\)")
+                          (string-append "'" libarchive
+                                         "/lib/libarchive.so'"))))))
+                  (replace 'check
+                    (lambda _ (invoke "pytest" "-vv"))))))
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-pytest" ,python-pytest)))
+    (inputs
+     `(("libarchive" ,libarchive)))
+    (home-page "https://github.com/Changaco/python-libarchive-c")
+    (synopsis "Python interface to libarchive")
+    (description
+     "This package provides Python bindings to libarchive, a C library to
+access possibly compressed archives in many different formats.  It uses
+Python's @code{ctypes} foreign function interface (FFI).")
+    (license license:lgpl2.0+)))
+
+(define-public python2-libarchive-c
+  (package-with-python2 python-libarchive-c))
+
+(define-public python-file
+  (package
+    (inherit file)
+    (name "python-file")
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f                                ;no tests
+       #:configure-flags '("--single-version-externally-managed" "--root=/")
+       #:phases (modify-phases %standard-phases
+                  (add-before 'build 'change-directory
+                    (lambda _
+                      (chdir "python")
+                      #t))
+                  (add-before 'build 'set-library-file-name
+                    (lambda* (#:key inputs #:allow-other-keys)
+                      (let ((file (assoc-ref inputs "file")))
+                        (substitute* "magic.py"
+                          (("find_library\\('magic'\\)")
+                           (string-append "'" file "/lib/libmagic.so'")))
+                        #t))))))
+    (inputs `(("file" ,file)))
+    (self-native-input? #f)
+    (synopsis "Python bindings to the libmagic file type guesser.  Note that
+this module and the python-magic module both provide a \"magic.py\" file;
+these two modules, which are different and were developed separately, both
+serve the same purpose: provide Python bindings for libmagic.")))
+
+(define-public python2-file
+  (package-with-python2 python-file))
+
+(define-public python-debian
+  (package
+    (name "python-debian")
+    (home-page "https://salsa.debian.org/python-debian-team/python-debian")
+    (version "0.1.28")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri name version))
+       (sha256
+        (base32
+         "0i15f0xzx679sd0ldq2sls9pnnps9fv6vhqvnv9dzf4qhma42i0y"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (synopsis "Debian package related modules")
+    (description
+     ;; XXX: Use @enumerate instead of @itemize to work around
+     ;; <http://bugs.gnu.org/21772>.
+     "This package provides Python modules that abstract many formats of
+Debian-related files, such as:
+
+@enumerate
+@item Debtags information;
+@item @file{debian/changelog} files;
+@item packages files, pdiffs;
+@item control files of single or multiple RFC822-style paragraphs---e.g.
+   @file{debian/control}, @file{.changes}, @file{.dsc};
+@item Raw @file{.deb} and @file{.ar} files, with (read-only) access to
+   contained files and meta-information.
+@end enumerate\n")
+
+    ;; Modules are either GPLv2+ or GPLv3+.
+    (license license:gpl3+)))
+
+(define-public python2-debian
+  (package-with-python2 python-debian))
+
+(define-public python-nbformat
+  (package
+    (name "python-nbformat")
+    (version "4.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "nbformat" version))
+       (sha256
+        (base32
+         "00nlf08h8yc4q73nphfvfhxrcnilaqanb8z0mdy6nxk0vzq4wjgp"))))
+    (build-system python-build-system)
+    (arguments `(#:tests? #f)) ; no test target
+    (propagated-inputs
+     `(("python-ipython-genutils" ,python-ipython-genutils)
+       ("python-jsonschema" ,python-jsonschema)
+       ("python-jupyter-core" ,python-jupyter-core)
+       ("python-traitlets" ,python-traitlets)))
+    (home-page "http://jupyter.org")
+    (synopsis "Jupyter Notebook format")
+    (description "This package provides the reference implementation of the
+Jupyter Notebook format and Python APIs for working with notebooks.")
+    (license license:bsd-3)))
+
+(define-public python2-nbformat
+  (package-with-python2 python-nbformat))
+
+(define-public python-bleach
+  (package
+    (name "python-bleach")
+    (version "1.4.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "bleach" version))
+       (sha256
+        (base32
+         "0jvg3jxrvnx7xmm9gj262v60ib452xlnwlb0navyp7jsvcd0d4qj"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-html5lib" ,python-html5lib-0.9)
+       ("python-six" ,python-six)))
+    (native-inputs
+     `(("python-nose" ,python-nose)))
+    (home-page "https://github.com/jsocol/bleach")
+    (synopsis "Whitelist-based HTML-sanitizing tool")
+    (description "Bleach is an easy whitelist-based HTML-sanitizing tool.")
+    (license license:asl2.0)))
+
+(define-public python2-bleach
+  (package-with-python2 python-bleach))
+
+(define-public python-entrypoints
+  (package
+    (name "python-entrypoints")
+    (version "0.2.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/takluyver/entrypoints/archive/"
+                           version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1pdvgfr5bxyvnfvxbsd3zi0dh3il71pc4k6rinx6zpps91b84a56"))))
+    (build-system python-build-system)
+    ;; The package does not come with a setup.py file, so we have to generate
+    ;; one ourselves.
+    (arguments
+     `(#:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'create-setup.py
+           (lambda _
+             (call-with-output-file "setup.py"
+               (lambda (port)
+                 (format port "\
+from setuptools import setup
+setup(name='entrypoints', version='~a', py_modules=['entrypoints'])
+" ,version))))))))
+    (home-page "https://github.com/takluyver/entrypoints")
+    (synopsis "Discover and load entry points from installed Python packages")
+    (description "Entry points are a way for Python packages to advertise
+objects with some common interface.  The most common examples are
+@code{console_scripts} entry points, which define shell commands by
+identifying a Python function to run.  The @code{entrypoints} module contains
+functions to find and load entry points.")
+    (license license:expat)))
+
+(define-public python2-entrypoints
+  (package-with-python2 python-entrypoints))
+
+(define-public python-nbconvert
+  (package
+    (name "python-nbconvert")
+    (version "5.0.0b1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "nbconvert" version))
+       (sha256
+        (base32
+         "0brclbb18l4nmd5qy3dl9wn05rjdh1fz4rmzdlfqacj12rcdvdgp"))))
+    (build-system python-build-system)
+    (arguments
+     `(;; The "bdist_egg" target is disabled by default, causing the installation
+       ;; to fail.
+       #:configure-flags (list "bdist_egg")
+       ;; FIXME: 5 failures, 40 errors.
+       #:tests? #f))
+       ;; #:phases
+       ;; (modify-phases %standard-phases
+       ;;   (replace 'check
+       ;;     (lambda _
+       ;;       (zero? (system* "py.test" "-v")))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (propagated-inputs
+     `(("python-bleach" ,python-bleach)
+       ("python-entrypoints" ,python-entrypoints)
+       ("python-jinja2" ,python-jinja2)
+       ("python-jupyter-core" ,python-jupyter-core)
+       ("python-mistune" ,python-mistune)
+       ("python-nbformat" ,python-nbformat)
+       ("python-pygments" ,python-pygments)
+       ("python-traitlets" ,python-traitlets)))
+    (home-page "http://jupyter.org")
+    (synopsis "Converting Jupyter Notebooks")
+    (description "The @code{nbconvert} tool, @{jupyter nbconvert}, converts
+notebooks to various other formats via Jinja templates.  It allows you to
+convert an @code{.ipynb} notebook file into various static formats including:
+
+@enumerate
+@item HTML
+@item LaTeX
+@item PDF
+@item Reveal JS
+@item Markdown (md)
+@item ReStructured Text (rst)
+@item executable script
+@end enumerate\n")
+    (license license:bsd-3)))
+
+(define-public python2-nbconvert
+  (package-with-python2 python-nbconvert))
+
+(define-public python-prometheus-client
+  (package
+    (name "python-prometheus-client")
+    (version "0.5.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "prometheus_client" version))
+       (sha256
+        (base32
+         "0g7rpv1pq2lab1nfqdx98z9d3bqwc400alg1j4ynrpjkrbsizhg8"))))
+    (build-system python-build-system)
+    (arguments '(#:tests? #f)) ; tests are not included
+    (propagated-inputs
+     `(("python-twisted" ,python-twisted)))
+    (home-page "https://github.com/prometheus/client_python")
+    (synopsis "Python client for the Prometheus monitoring system")
+    (description
+     "This package provides a Python client for the Prometheus monitoring
+system.")
+    (license license:asl2.0)))
+
+(define-public python2-prometheus-client
+  (package-with-python2 python-prometheus-client))
+
+(define-public python-notebook
+  (package
+    (name "python-notebook")
+    (version "5.7.4")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "notebook" version))
+              (sha256
+               (base32
+                "0jm7324mbxljmn9hgapj66q7swyz5ai92blmr0jpcy0h80x6f26r"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             ;; These tests require a browser
+             (delete-file-recursively "notebook/tests/selenium")
+             ;; Some tests need HOME
+             (setenv "HOME" "/tmp")
+             ;; This file contains "warningfilters", which are not supported
+             ;; by this version of nose.
+             (delete-file "setup.cfg")
+             (with-directory-excursion "/tmp"
+               (invoke "nosetests" "-v"))
+             #t)))))
+    (propagated-inputs
+     `(("python-jupyter-core" ,python-jupyter-core)
+       ("python-nbformat" ,python-nbformat)
+       ("python-nbconvert" ,python-nbconvert)
+       ("python-prometheus-client" ,python-prometheus-client)
+       ("python-send2trash" ,python-send2trash)
+       ("python-terminado" ,python-terminado)))
+    (native-inputs
+     `(("python-nose" ,python-nose)
+       ("python-sphinx" ,python-sphinx)
+       ("python-requests" ,python-requests)))
+    (home-page "http://jupyter.org/")
+    (synopsis "Web-based notebook environment for interactive computing")
+    (description
+     "The Jupyter HTML notebook is a web-based notebook environment for
+interactive computing.")
+    (properties `((python2-variant . ,(delay python2-notebook))))
+    (license license:bsd-3)))
+
+(define-public python2-notebook
+  (let ((base (package-with-python2
+                (strip-python2-variant python-notebook))))
+    (package (inherit base)
+      (native-inputs
+       `(("python2-mock" ,python2-mock)
+         ,@(package-native-inputs base)))
+      (arguments
+       (substitute-keyword-arguments (package-arguments base)
+         ((#:phases phases)
+          `(modify-phases ,phases
+             (add-before 'check 'disable-test-case
+              ;; The test requires network access to localhost. Curiously it
+              ;; fails with Python 2 only. Simply make the test-case return
+              ;; immediately.
+              (lambda _
+                (substitute*
+                    "notebook/services/nbconvert/tests/test_nbconvert_api.py"
+                  (("formats = self.nbconvert_api") "return #")))))))))))
+
+(define-public python-widgetsnbextension
+  (package
+    (name "python-widgetsnbextension")
+    (version "3.4.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "widgetsnbextension" version))
+       (sha256
+        (base32
+         "0rc2nivdy7k4m3vljx7wdh2jh11djapcgwhvzlbs0isl8gl8nqgs"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-ipykernel" ,python-ipykernel)
+       ("python-notebook" ,python-notebook)))
+    (native-inputs
+     `(("python-certifi" ,python-certifi)
+       ("python-nose" ,python-nose)))
+    (home-page "https://ipython.org")
+    (synopsis "IPython HTML widgets for Jupyter")
+    (description "This package provides interactive HTML widgets for Jupyter
+notebooks.")
+    (license license:bsd-3)))
+
+(define-public python2-widgetsnbextension
+  (package-with-python2 python-widgetsnbextension))
+
+(define-public python-ipywidgets
+  (package
+    (name "python-ipywidgets")
+    (version "5.2.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ipywidgets" version))
+       (sha256
+        (base32
+         "1lk0qrr5l9a0z7qkkn30hv5832whxwxymf1l576fmmad0n7hkxms"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-ipython" ,python-ipython)
+       ("python-traitlets" ,python-traitlets)
+       ("python-widgetsnbextension" ,python-widgetsnbextension)))
+    (native-inputs
+     `(("python-nose" ,python-nose)
+       ("python-pytest" ,python-pytest)))
+    (home-page "https://ipython.org")
+    (synopsis "IPython HTML widgets for Jupyter")
+    (description "Ipywidgets are interactive HTML widgets for Jupyter
+notebooks and the IPython kernel.  Notebooks come alive when interactive
+widgets are used.  Users gain control of their data and can visualize changes
+in the data.")
+    (license license:bsd-3)))
+
+(define-public python2-ipywidgets
+  (package-with-python2 python-ipywidgets))
+
+(define-public python-jupyter-console
+  (package
+    (name "python-jupyter-console")
+    (version "5.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "jupyter_console" version))
+       (sha256
+        (base32
+         "1kam1qzgwr7srhm5r6aj90di5sws4bq0jmiw15452ddamb9yspal"))))
+    (build-system python-build-system)
+    ;; Tests only run in an TTY.
+    (arguments `(#:tests? #f))
+    (propagated-inputs
+     `(("python-ipykernel" ,python-ipykernel)
+       ("python-jupyter-client" ,python-jupyter-client)
+       ("python-prompt-toolkit" ,python-prompt-toolkit-1)
+       ("python-pygments" ,python-pygments)))
+    (native-inputs
+     `(("python-nose" ,python-nose)))
+    (home-page "https://jupyter.org")
+    (synopsis "Jupyter terminal console")
+    (description "This package provides a terminal-based console frontend for
+Jupyter kernels.  It also allows for console-based interaction with non-Python
+Jupyter kernels such as IJulia and IRKernel.")
+    (license license:bsd-3)))
+
+(define-public python2-jupyter-console
+  (package-with-python2 python-jupyter-console))
+
+;; The python-ipython and python-jupyter-console require each other. To get
+;; the functionality in both packages working, strip down the
+;; python-jupyter-console package when using it as an input to python-ipython.
+(define python-jupyter-console-minimal
+  (package
+    (inherit python-jupyter-console)
+    (name "python-jupyter-console-minimal")
+    (arguments
+     (substitute-keyword-arguments
+         (package-arguments python-jupyter-console)
+       ((#:phases phases)
+        `(modify-phases ,phases
+           (add-after 'install 'delete-bin
+             (lambda* (#:key outputs #:allow-other-keys)
+               ;; Delete the bin files, to avoid conflicts in profiles
+               ;; where python-ipython and python-jupyter-console are
+               ;; both present.
+               (delete-file-recursively
+                (string-append
+                 (assoc-ref outputs "out") "/bin"))))))))
+    ;; Remove the python-ipython propagated input, to avoid the cycle
+    (propagated-inputs
+     (alist-delete
+      "python-ipython"
+      (package-propagated-inputs python-jupyter-console)))))
+
+(define-public python-qtconsole
+  (package
+    (name "python-qtconsole")
+    (version "4.4.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "qtconsole" version))
+       (sha256
+        (base32
+         "1b03n1ixzscm0jw97l4dq5iy4fslnqxq5bb8287xb7n2a1gs26xw"))))
+    (build-system python-build-system)
+    (arguments
+     ;; XXX: Tests are disabled, because this package needs python-ipython 7,
+     ;; but we only have the LTS version 5.x.  This means that there might be
+     ;; runtime errors, but since this is a dependency of the Jupyter package,
+     ;; and Jupyter can be used without the qtconsole we can overlook this for
+     ;; now.
+     `(#:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'pre-check
+           (lambda _
+             (setenv "QT_QPA_PLATFORM" "offscreen")
+             #t)))))
+    (propagated-inputs
+     `(("python-ipykernel" ,python-ipykernel)
+       ("python-ipython" ,python-ipython)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "http://jupyter.org")
+    (synopsis "Jupyter Qt console")
+    (description "This package provides a Qt-based console for Jupyter with
+support for rich media output.")
+    (license license:bsd-3)))
+
+(define-public jupyter
+  (package
+    (name "jupyter")
+    (version "1.0.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "jupyter" version))
+       (sha256
+        (base32
+         "0pwf3pminkzyzgx5kcplvvbvwrrzd3baa7lmh96f647k30rlpp6r"))))
+    (build-system python-build-system)
+    (arguments '(#:tests? #f)) ; there are none.
+    (propagated-inputs
+     `(("python-ipykernel" ,python-ipykernel)
+       ("python-ipywidgets" ,python-ipywidgets)
+       ("python-jupyter-console" ,python-jupyter-console)
+       ("python-nbconvert" ,python-nbconvert)
+       ("python-notebook" ,python-notebook)
+       ("python-qtconsole" ,python-qtconsole)))
+    (native-search-paths
+     (list (search-path-specification
+            (variable "JUPYTER_PATH")
+            (files '("share/jupyter")))))
+    (home-page "https://jupyter.org")
+    (synopsis "Web application for interactive documents")
+    (description
+     "The Jupyter Notebook is a web application that allows you to create and
+share documents that contain live code, equations, visualizations and
+explanatory text.  Uses include: data cleaning and transformation, numerical
+simulation, statistical modeling, machine learning and much more.")
+    (license license:bsd-3)))
+
+(define-public python-chardet
+  (package
+    (name "python-chardet")
+    (version "3.0.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "chardet" version))
+       (sha256
+        (base32
+         "1bpalpia6r5x1kknbk11p1fzph56fmmnp405ds8icksd3knr5aw4"))))
+    (native-inputs
+     `(("python-hypothesis" ,python-hypothesis)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (build-system python-build-system)
+    (home-page "https://github.com/chardet/chardet")
+    (synopsis "Universal encoding detector for Python 2 and 3")
+    (description
+     "This package provides @code{chardet}, a Python module that can
+automatically detect a wide range of file encodings.")
+    (license license:lgpl2.1+)))
+
+(define-public python2-chardet
+  (package-with-python2 python-chardet))
+
+(define-public python-docopt
+  (package
+    (name "python-docopt")
+    (version "0.6.2")
+    (source
+     (origin
+       (method url-fetch)
+       ;; The release on PyPI does not include tests.
+       (uri (string-append
+             "https://github.com/docopt/docopt/archive/"
+             version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "16bf890xbdz3m30rsv2qacklh2rdn1zrfspfnwzx9g7vwz8yw4r1"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _ (invoke "py.test"))))))
+    (home-page "http://docopt.org")
+    (synopsis "Command-line interface description language for Python")
+    (description "This library allows the user to define a command-line
+interface from a program's help message rather than specifying it
+programatically with command-line parsers like @code{getopt} and
+@code{argparse}.")
+    (license license:expat)))
+
+(define-public python2-docopt
+  (package-with-python2 python-docopt))
+
+(define-public python-pythondialog
+  (package
+    (name "python-pythondialog")
+    (version "3.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pythondialog" version))
+       (sha256
+        (base32
+         "1728ghsran47jczn9bhlnkvk5bvqmmbihabgif5h705b84r1272c"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-path
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let* ((dialog (assoc-ref inputs "dialog")))
+               ;; Since this library really wants to grovel the search path, we
+               ;; must hardcode dialog's store path into it.
+               (substitute* "dialog.py"
+                 (("os.getenv\\(\"PATH\", \":/bin:/usr/bin\"\\)")
+                  (string-append "os.getenv(\"PATH\")  + \":" dialog "/bin\"")))
+               #t))))
+       #:tests? #f)) ; no test suite
+    (propagated-inputs
+     `(("dialog" ,dialog)))
+    (home-page "http://pythondialog.sourceforge.net/")
+    (synopsis "Python interface to the UNIX dialog utility")
+    (description "A Python wrapper for the dialog utility.  Its purpose is to
+provide an easy to use, pythonic and comprehensive Python interface to dialog.
+This allows one to make simple text-mode user interfaces on Unix-like systems")
+    (license license:lgpl2.1)
+    (properties `((python2-variant . ,(delay python2-pythondialog))))))
+
+(define-public python2-pythondialog
+  (let ((base (package-with-python2 (strip-python2-variant python-pythondialog))))
+    (package
+      (inherit base)
+      (version (package-version python-pythondialog))
+      (source (origin
+                (method url-fetch)
+                (uri (pypi-uri "python2-pythondialog" version))
+                (sha256
+                 (base32
+                  "0d8k7lxk50imdyx85lv8j98i4c93a71iwpapnl1506rpkbm9qvd9")))))))
+
+(define-public python-configobj
+  (package
+    (name "python-configobj")
+    (version "5.0.6")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://pypi.python.org/packages/source/c/configobj/"
+                    "configobj-" version ".tar.gz"))
+              (sha256
+               (base32
+                "00h9rcmws03xvdlfni11yb60bz3kxfvsj6dg6nrpzj71f03nbxd2"))
+              ;; Patch setup.py so it looks for python-setuptools, which is
+              ;; required to parse the keyword 'install_requires' in setup.py.
+              (patches (search-patches "python-configobj-setuptools.patch"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (synopsis "Config file reading, writing and validation")
+    (description "ConfigObj is a simple but powerful config file reader and
+writer: an ini file round tripper.  Its main feature is that it is very easy to
+use, with a straightforward programmer’s interface and a simple syntax for
+config files.")
+    (home-page "https://github.com/DiffSK/configobj")
+    (license license:bsd-3)))
+
+(define-public python2-configobj
+  (package-with-python2 python-configobj))
+
+(define-public python-configargparse
+  (package
+    (name "python-configargparse")
+    (version "0.12.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "ConfigArgParse" version))
+              (sha256
+               (base32
+                "0fgkiqh6r3rbkdq3k8c48m85g52k96686rw3a6jg4lcncrkpvk98"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pyyaml" ,python-pyyaml)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             ;; Bypass setuptools-shim because one test relies on "setup.py"
+             ;; being the first argument passed to the python call.
+             ;;
+             ;; NOTE: Many tests do not run because they rely on Python's
+             ;; built-in test.test_argparse, but we remove the unit tests from
+             ;; our Python installation.
+             (invoke "python" "setup.py" "test"))))))
+    (synopsis "Replacement for argparse")
+    (description "A drop-in replacement for argparse that allows options to also
+be set via config files and/or environment variables.")
+    (home-page "https://github.com/bw2/ConfigArgParse")
+    (license license:expat)))
+
+(define-public python2-configargparse
+  (package-with-python2 python-configargparse))
+
+(define-public python-argparse-manpage
+  (package
+    (name "python-argparse-manpage")
+    (version "1.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "argparse-manpage" version))
+       (sha256
+        (base32
+         "0blh31zns68anina9lba5wh81d1414s97p60zw5l0d0shhh0wj5p"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/praiskup/argparse-manpage")
+    (synopsis "Build manual page from Python's ArgumentParser object")
+    (description
+     "This package provides tools to build manual pages from Python's
+@code{ArgumentParser} object.")
+    (license license:asl2.0)))
+
+(define-public python2-contextlib2
+  (package
+    (name "python2-contextlib2")
+    (version "0.5.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "contextlib2" version))
+       (sha256
+        (base32
+         "0j6ad6lwwyc9kv71skj098v5l7x5biyj2hs4lc5x1kcixqcr97sh"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _ (invoke "python" "test_contextlib2.py" "-v"))))))
+    (native-inputs
+     `(("python2-unittest2" ,python2-unittest2)))
+    (home-page "http://contextlib2.readthedocs.org/")
+    (synopsis "Tools for decorators and context managers")
+    (description "This module is primarily a backport of the Python
+3.2 contextlib to earlier Python versions.  Like contextlib, it
+provides utilities for common tasks involving decorators and context
+managers.  It also contains additional features that are not part of
+the standard library.")
+    (license license:psfl)))
+
+(define-public python-texttable
+  (package
+    (name "python-texttable")
+    (version "0.8.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "texttable" version))
+       (sha256
+        (base32
+         "1liiiydgkg37i46a418aw19fyf6z3ds51wdwwpyjbs12x0phhf4a"))))
+    (build-system python-build-system)
+    (arguments '(#:tests? #f)) ; no tests
+    (home-page "https://github.com/foutaise/texttable/")
+    (synopsis "Python module for creating simple ASCII tables")
+    (description "Texttable is a Python module for creating simple ASCII
+tables.")
+    (license license:lgpl2.1+)))
+
+(define-public python2-texttable
+  (package-with-python2 python-texttable))
+
+(define-public python-atomicwrites
+  (package
+    (name "python-atomicwrites")
+    (version "1.1.5")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "atomicwrites" version))
+             (sha256
+              (base32
+               "11bm90fwm2avvf4f3ib8g925w7jr4m11vcsinn1bi6ns4bm32214"))))
+    (build-system python-build-system)
+    (synopsis "Atomic file writes in Python")
+    (description "Library for atomic file writes using platform dependent tools
+for atomic file system operations.")
+    (home-page "https://github.com/untitaker/python-atomicwrites")
+    (license license:expat)))
+
+(define-public python2-atomicwrites
+  (package-with-python2 python-atomicwrites))
+
+(define-public python-click-threading
+  (package
+    (name "python-click-threading")
+    (version "0.4.4")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "click-threading" version))
+             (sha256
+              (base32
+               "1rsxc2fbkxlhwhlmxsdjzq3spn284l6rvjfcz9mbb17ibgdgmc5j"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-click" ,python-click)))
+    (synopsis "Utilities for multithreading in Click")
+    (description "This package provides utilities for multithreading in Click
+applications.")
+    (home-page "https://github.com/click-contrib/click-threading")
+    (license license:expat)))
+
+(define-public python-click-log
+  (package
+    (name "python-click-log")
+    (version "0.3.2")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "click-log" version))
+             (sha256
+              (base32
+               "091i03bhxyzsdbc6kilxhivfda2f8ymz3b33xa6cj5kbzjiirz8n"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-click" ,python-click)))
+    (synopsis "Logging for click applications")
+    (description "This package provides a Python library for logging Click
+applications.")
+    (home-page "https://github.com/click-contrib/click-log")
+    (license license:expat)))
+
+(define-public python-apipkg
+  (package
+    (name "python-apipkg")
+    (version "1.4")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "apipkg" version))
+             (sha256
+              (base32
+               "1iks5701qnp3dlr3q1d9qm68y2plp2m029irhpz92a44psfkjf1f"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (synopsis "Namespace control and lazy-import mechanism")
+    (description "With apipkg you can control the exported namespace of a Python
+package and greatly reduce the number of imports for your users.  It is a small
+pure Python module that works on virtually all Python versions.")
+    (home-page "https://github.com/pytest-dev/apipkg")
+    (license license:expat)))
+
+(define-public python2-apipkg
+  (package-with-python2 python-apipkg))
+
+(define-public python-execnet
+  (package
+    (name "python-execnet")
+    (version "1.4.1")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "execnet" version))
+             (sha256
+              (base32
+               "1rpk1vyclhg911p3hql0m0nrpq7q7mysxnaaw6vs29cpa6kx8vgn"))))
+    (build-system python-build-system)
+    (arguments
+     `(;; 2 failed, 275 passed, 670 skipped, 4 xfailed
+       ;; The two test failures are caused by the lack of an `ssh` executable.
+       ;; The test suite can be run with pytest after the 'install' phase.
+       #:tests? #f))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-setuptools-scm" ,python-setuptools-scm)))
+    (propagated-inputs
+     `(("python-apipkg" ,python-apipkg)))
+    (synopsis "Rapid multi-Python deployment")
+    (description "Execnet provides a share-nothing model with
+channel-send/receive communication for distributing execution across many
+Python interpreters across version, platform and network barriers.  It has a
+minimal and fast API targeting the following uses:
+@enumerate
+@item distribute tasks to (many) local or remote CPUs
+@item write and deploy hybrid multi-process applications
+@item write scripts to administer multiple environments
+@end enumerate")
+    (home-page "http://codespeak.net/execnet/")
+    (license license:expat)))
+
+(define-public python2-execnet
+  (package-with-python2 python-execnet))
+
+(define-public python-icalendar
+  (package
+    (name "python-icalendar")
+    (version "4.0.3")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "icalendar" version))
+             (sha256
+              (base32
+               "0mk3dk1dxkcm46jy48v27j2w2349iv4sbimqj1yb5js43mx49hh7"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-dateutil" ,python-dateutil)
+       ("python-pytz" ,python-pytz)))
+    (synopsis "Python library for parsing iCalendar files")
+    (description "The icalendar package is a parser/generator of iCalendar
+files for use with Python.")
+    (home-page "https://github.com/collective/icalendar")
+    (license license:bsd-2)))
+
+(define-public python-sphinxcontrib-newsfeed
+  (package
+    (name "python-sphinxcontrib-newsfeed")
+    (version "0.1.4")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "sphinxcontrib-newsfeed" version))
+             (sha256
+              (base32
+               "1d7gam3mn8v4in4p16yn3v10vps7nnaz6ilw99j4klij39dqd37p"))))
+    (arguments '(#:tests? #f)) ; No tests.
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-sphinx" ,python-sphinx)))
+    (synopsis "News Feed extension for Sphinx")
+    (description "Sphinxcontrib-newsfeed is an extension for adding a simple
+Blog, News or Announcements section to a Sphinx website.")
+    (home-page "https://bitbucket.org/prometheus/sphinxcontrib-newsfeed")
+    (license license:bsd-2)))
+
+(define-public python-args
+  (package
+    (name "python-args")
+    (version "0.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "args" version))
+              (sha256
+               (base32
+                "057qzi46h5dmxdqknsbrssn78lmqjlnm624iqdhrnpk26zcbi1d7"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/kennethreitz/args")
+    (synopsis "Command-line argument parser")
+    (description
+     "This library provides a Python module to parse command-line arguments.")
+    (license license:bsd-3)))
+
+(define-public python2-args
+  (package-with-python2 python-args))
+
+(define-public python-clint
+  (package
+    (name "python-clint")
+    (version "0.5.1")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "clint" version))
+              (sha256
+               (base32
+                "1an5lkkqk1zha47198p42ji3m94xmzx1a03dn7866m87n4r4q8h5"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _ (invoke "py.test" "-v"))))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (propagated-inputs
+     `(("python-args" ,python-args)))
+    (home-page "https://github.com/kennethreitz/clint")
+    (synopsis "Command-line interface tools")
+    (description
+     "Clint is a Python module filled with a set of tools for developing
+command-line applications, including tools for colored and indented
+output, progress bar display, and pipes.")
+    (license license:isc)))
+
+(define-public python2-clint
+  (package-with-python2 python-clint))
+
+(define-public python-astor
+  (package
+    (name "python-astor")
+    (version "0.5")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "astor" version))
+              (sha256
+               (base32
+                "1fdafq5hkis1fxqlmhw0sn44zp2ar46nxhbc22cvwg7hsd8z5gsa"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/berkerpeksag/astor")
+    (synopsis "Read and write Python ASTs")
+    (description
+     "Astor is designed to allow easy manipulation of Python source via the
+Abstract Syntax Tree.")
+    (license license:bsd-3)))
+
+(define-public python2-astor
+  (package-with-python2 python-astor))
+
+(define-public python-rply
+  (package
+    (name "python-rply")
+    (version "0.7.5")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "rply" version))
+              (sha256
+               (base32
+                "0lv428895zxsz43968qx0q9bimwqnfykndz4dpjbq515w2gvzhjh"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-appdirs" ,python-appdirs)))
+    (home-page "https://github.com/alex/rply")
+    (synopsis "Parser generator for Python")
+    (description
+     "This package provides a pure Python based parser generator, that also
+works with RPython.  It is a more-or-less direct port of David Bazzley's PLY,
+with a new public API, and RPython support.")
+    (license license:bsd-3)))
+
+(define-public python2-rply
+  (package-with-python2 python-rply))
+
+(define-public python-hy
+  (package
+    (name "python-hy")
+    (version "0.13.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "hy" version))
+              (sha256
+               (base32
+                "19sfymaksx9jhksfnb15ahid46mzrhdfzz6yy2craz2qnzvpmky8"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             ;; Tests require write access to HOME.
+             (setenv "HOME" "/tmp")
+             (invoke "nosetests"))))))
+    (native-inputs
+     `(("python-coverage" ,python-coverage)
+       ("python-nose" ,python-nose)))
+    (propagated-inputs
+     `(("python-astor" ,python-astor)
+       ("python-clint" ,python-clint)
+       ("python-rply" ,python-rply)))
+    (home-page "http://hylang.org/")
+    (synopsis "Lisp frontend to Python")
+    (description
+     "Hy is a dialect of Lisp that's embedded in Python.  Since Hy transforms
+its Lisp code into the Python Abstract Syntax Tree, you have the whole world of
+Python at your fingertips, in Lisp form.")
+    (license license:expat)))
+
+(define-public python2-hy
+  (package-with-python2 python-hy))
+
+(define-public python2-functools32
+  (package
+    (name "python2-functools32")
+    (version "3.2.3-2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "functools32" version))
+        (sha256
+         (base32
+          "0v8ya0b58x47wp216n1zamimv4iw57cxz3xxhzix52jkw3xks9gn"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:tests? #f)) ; no test target
+    (home-page "https://github.com/MiCHiLU/python-functools32")
+    (synopsis
+     "Backport of the functools module from Python 3.2.3")
+    (description
+     "This package is a backport of the @code{functools} module from Python
+3.2.3 for use with older versions of Python and PyPy.")
+    (license license:expat)))
+
+(define-public python2-subprocess32
+  (package
+    (name "python2-subprocess32")
+    (version "3.2.7")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "subprocess32" version))
+              (sha256
+               (base32
+                "14350dhhlhyz5gqzi3lihn9m6lvskx5mcb20srx1kgsk9i50li8y"))
+              (patches
+               (search-patches "python2-subprocess32-disable-input-test.patch"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       ;; The test suite fails with Python > 2.7.13:
+       ;;     import test.support
+       ;; ImportError: No module named support
+       #:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-/bin/sh
+           (lambda _
+             (substitute* '("subprocess32.py"
+                            "test_subprocess32.py")
+               (("/bin/sh") (which "sh")))
+             #t)))))
+    (home-page "https://github.com/google/python-subprocess32")
+    (synopsis "Backport of the subprocess module from Python 3.2")
+    (description
+     "This is a backport of the @code{subprocess} standard library module
+from Python 3.2 and 3.3 for use on Python 2.  It includes bugfixes and some
+new features.  On POSIX systems it is guaranteed to be reliable when used
+in threaded applications.  It includes timeout support from Python 3.3 but
+otherwise matches 3.2’s API.")
+    (license license:psfl)))
+
+(define-public python2-futures
+  (package
+    (name "python2-futures")
+    (version "3.2.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "futures" version))
+        (sha256
+         (base32
+          "0rdjmmsab550kxsssdq49jcniz77zlkpw4pvi9hvib3lsskjmh4y"))))
+    (build-system python-build-system)
+    (arguments `(#:python ,python-2
+                 ;; FIXME: Python 2.7.14 moved the test.support library,
+                 ;; but our package has not yet been adjusted.  Enable
+                 ;; tests when the python2 package has been fixed.
+                 #:tests? #f))
+    (home-page "https://github.com/agronholm/pythonfutures")
+    (synopsis
+     "Backport of the concurrent.futures package from Python 3.2")
+    (description
+     "The concurrent.futures module provides a high-level interface for
+asynchronously executing callables.  This package backports the
+concurrent.futures package from Python 3.2")
+    (license license:bsd-3)))
+
+(define-public python-promise
+  (package
+    (name "python-promise")
+    (version "0.4.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "promise" version))
+        (sha256
+         (base32
+          "1k19ms8l3d5jzjh557rgkxb5sg4mqgfc315rn4hx1z3n8qq6lr3h"))))
+    (build-system python-build-system)
+    ;; Tests wants python-futures, which is a python2 only program, and
+    ;; can't be found by python-promise at test time.
+    (arguments `(#:tests? #f))
+    (home-page "https://github.com/syrusakbary/promise")
+    (synopsis "Promises/A+ implementation for Python")
+    (description
+     "Promises/A+ implementation for Python")
+    (properties `((python2-variant . ,(delay python2-promise))))
+    (license license:expat)))
+
+(define-public python2-promise
+  (let ((promise (package-with-python2
+                   (strip-python2-variant python-promise))))
+    (package (inherit promise)
+      (arguments (substitute-keyword-arguments (package-arguments promise)
+                   ((#:tests? _) #t)))
+      (native-inputs
+       `(("python2-futures" ,python2-futures)
+         ("python2-pytest" ,python2-pytest)
+         ,@(package-native-inputs promise))))))
+
+(define-public python-colorama
+  (package
+   (name "python-colorama")
+   (version "0.3.9")
+   (source
+    (origin
+     (method url-fetch)
+     (uri (pypi-uri "colorama" version))
+     (sha256
+      (base32
+       "1wd1szk0z3073ghx26ynw43gnc140ibln1safgsis6s6z3s25ss8"))))
+   (build-system python-build-system)
+   (synopsis "Colored terminal text rendering for Python")
+   (description "Colorama is a Python library for rendering colored terminal
+text.")
+   (home-page "https://pypi.python.org/pypi/colorama")
+   (license license:bsd-3)))
+
+(define-public python2-colorama
+  (package-with-python2 python-colorama))
+
+(define-public python-rsa
+  (package
+   (name "python-rsa")
+   (version "3.4.2")
+   (source
+    (origin
+     (method url-fetch)
+     (uri (pypi-uri "rsa" version))
+     (sha256
+      (base32
+       "1dcxvszbikgzh99ybdc7jq0zb9wspy2ds8z9mjsqiyv3q884xpr5"))))
+   (build-system python-build-system)
+   (propagated-inputs
+    `(("python-pyasn1" ,python-pyasn1)))
+   (synopsis "Pure-Python RSA implementation")
+   (description "Python-RSA is a pure-Python RSA implementation.  It supports
+encryption and decryption, signing and verifying signatures, and key
+generation according to PKCS#1 version 1.5.  It can be used as a Python
+library as well as on the command line.")
+   (home-page "https://stuvel.eu/rsa")
+   (license license:asl2.0)))
+
+(define-public python2-rsa
+  (package-with-python2 python-rsa))
+
+(define-public python-pluggy
+  (package
+   (name "python-pluggy")
+   (version "0.7.1")
+   (source
+    (origin
+     (method url-fetch)
+     (uri (pypi-uri "pluggy" version))
+     (sha256
+      (base32
+       "1qbn70mksmr03hac6jgp6fiqc4l7859z8dchx2x950vhlij87swm"))))
+   (build-system python-build-system)
+   (native-inputs
+    `(("python-setuptools-scm" ,python-setuptools-scm)))
+   (synopsis "Plugin and hook calling mechanism for Python")
+   (description "Pluggy is an extraction of the plugin manager as used by
+Pytest but stripped of Pytest specific details.")
+   (home-page "https://pypi.python.org/pypi/pluggy")
+   (license license:expat)))
+
+(define-public python2-pluggy
+  (package-with-python2 python-pluggy))
+
+(define-public python-tox
+  (package
+   (name "python-tox")
+   (version "2.8.1")
+   (source
+    (origin
+     (method url-fetch)
+     (uri (pypi-uri "tox" version))
+     (sha256
+      (base32
+       "1drp6mwm8wdypjym15ia8lwjxbhcksb9vzxg4ay5dh4ji57by2ny"))))
+   (build-system python-build-system)
+   (arguments
+    ;; FIXME: Tests require pytest-timeout, which itself requires
+    ;; pytest>=2.8.0 for installation.
+    '(#:tests? #f))
+   (propagated-inputs
+    `(("python-pluggy" ,python-pluggy) ; >=0.3.0,<0.4.0
+      ("python-py" ,python-py)
+      ("python-virtualenv" ,python-virtualenv)))
+   (native-inputs
+    `(; FIXME: Missing: ("python-pytest-timeout" ,python-pytest-timeout)
+      ("python-pytest" ,python-pytest)  ; >= 2.3.5
+      ("python-setuptools-scm" ,python-setuptools-scm)))
+   (home-page "http://tox.testrun.org/")
+   (synopsis "Virtualenv-based automation of test activities")
+   (description "Tox is a generic virtualenv management and test command line
+tool.  It can be used to check that a package installs correctly with
+different Python versions and interpreters, or run tests in each type of
+supported environment, or act as a frontend to continuous integration
+servers.")
+   (license license:expat)))
+
+(define-public python2-tox
+  (package-with-python2 python-tox))
+
+(define-public python-jmespath
+  (package
+   (name "python-jmespath")
+   (version "0.9.3")
+   (source
+    (origin
+     (method url-fetch)
+     (uri (pypi-uri "jmespath" version))
+     (sha256
+      (base32
+       "0r7wc7fsxmlwzxx9j1j7rms06c6xs6d4sysirdhz1jk2mb4x90ba"))))
+   (build-system python-build-system)
+   (native-inputs
+    `(("python-nose" ,python-nose)))
+   (synopsis "JSON Matching Expressions")
+   (description "JMESPath (pronounced “james path”) is a Python library that
+allows one to declaratively specify how to extract elements from a JSON
+document.")
+   (home-page "https://github.com/jmespath/jmespath.py")
+   (license license:expat)))
+
+(define-public python2-jmespath
+  (package-with-python2 python-jmespath))
+
+(define-public python-botocore
+  (package
+   (name "python-botocore")
+   (version "1.8.43")
+   (source
+    (origin
+     (method url-fetch)
+     (uri (pypi-uri "botocore" version))
+     (sha256
+      (base32
+       "12cqpbnz3vfv41mp9admvciw7bc7hz57sjpqs2bxaw9wnfmbw5lg"))))
+   (build-system python-build-system)
+   (arguments
+    ;; FIXME: Many tests are failing.
+    '(#:tests? #f))
+   (propagated-inputs
+    `(("python-dateutil" ,python-dateutil)
+      ("python-docutils" ,python-docutils)
+      ("python-jmespath" ,python-jmespath)))
+   (native-inputs
+    `(("python-mock" ,python-mock)
+      ("python-nose" ,python-nose)
+      ("behave" ,behave)
+      ("python-tox" ,python-tox)
+      ("python-wheel" ,python-wheel)))
+   (home-page "https://github.com/boto/botocore")
+   (synopsis "Low-level interface to AWS")
+   (description "Botocore is a Python library that provides a low-level
+interface to the Amazon Web Services (AWS) API.")
+   (license license:asl2.0)))
+
+(define-public python2-botocore
+  (package-with-python2 python-botocore))
+
+(define-public python-xdo
+  (package
+    (name "python-xdo")
+    (version "0.3")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "http://http.debian.net/debian/pool/main/p/python-xdo/"
+                    "python-xdo_" version ".orig.tar.gz"))
+              (sha256
+               (base32
+                "1vqh1n5yy5dhnq312kwrl90fnck4v26is3lq3lxdvcn60vv19da0"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (add-before 'install 'patch-libxdo-path
+           ;; Hardcode the path of dynamically loaded libxdo library.
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((libxdo (string-append
+                            (assoc-ref inputs "xdotool")
+                            "/lib/libxdo.so")))
+               (substitute* "xdo/_xdo.py"
+                 (("find_library\\(\"xdo\"\\)")
+                  (simple-format #f "\"~a\"" libxdo)))
+               #t))))
+       #:tests? #f))  ; no tests provided
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (inputs
+     `(("xdotool" ,xdotool)
+       ("libX11" ,libx11)))
+    (home-page "https://tracker.debian.org/pkg/python-xdo")
+    (synopsis "Python library for simulating X11 keyboard/mouse input")
+    (description "Provides bindings to libxdo for manipulating X11 via simulated
+input.  (Note that this is mostly a legacy library; you may wish to look at
+python-xdo for newer bindings.)")
+    (license license:bsd-3)))
+
+(define-public python2-xdo
+  (package-with-python2 python-xdo))
+
+(define-public python-mako
+  (package
+    (name "python-mako")
+    (version "1.0.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Mako" version))
+       (sha256
+        (base32
+         "1bi5gnr8r8dva06qpyx4kgjc6spm2k1y908183nbbaylggjzs0jf"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-markupsafe" ,python-markupsafe)))
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-nose" ,python-nose)
+       ("python-pytest" ,python-pytest)))
+    (home-page "http://www.makotemplates.org/")
+    (synopsis "Templating language for Python")
+    (description "Mako is a templating language for Python that compiles
+templates into Python modules.")
+    (license license:expat)))
+
+(define-public python2-mako
+  (package-with-python2 python-mako))
+
+(define-public python-waitress
+  (package
+    (name "python-waitress")
+    (version "1.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "waitress" version))
+       (patches (search-patches "python-waitress-fix-tests.patch"))
+       (sha256
+        (base32
+         "1a85gyji0kajc3p0s1pwwfm06w4wfxjkvvl4rnrz3h164kbd6g6k"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/Pylons/waitress")
+    (synopsis "Waitress WSGI server")
+    (description "Waitress is meant to be a production-quality pure-Python WSGI
+server with very acceptable performance.")
+    (license license:zpl2.1)))
+
+(define-public python2-waitress
+  (package-with-python2 python-waitress))
+
+(define-public python-pyquery
+  (package
+    (name "python-pyquery")
+    (version "1.2.17")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pyquery" version))
+       (sha256
+        (base32
+         "1xia20wm0vx5dk85kcwgh13bylz8qh47ffjxssd2586r60xi783a"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-webob" ,python-webob)
+       ("python-webtest" ,python-webtest)))
+    (propagated-inputs
+     `(("python-lxml" ,python-lxml)
+       ("python-cssselect" ,python-cssselect)))
+    (home-page "https://github.com/gawel/pyquery")
+    (synopsis "Make jQuery-like queries on xml documents")
+    (description "pyquery allows you to make jQuery queries on xml documents.
+The API is as much as possible the similar to jQuery.  pyquery uses lxml for
+fast xml and html manipulation.")
+    (license license:bsd-3)))
+
+(define-public python2-pyquery
+  (package-with-python2 python-pyquery))
+
+(define-public python-anyjson
+  (package
+    (name "python-anyjson")
+    (version "0.3.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "anyjson" version))
+       (sha256
+        (base32
+         "1fjph4alvcscsl5d4b6qpv1yh31jy05jxi1l0xff7lws7j32v09p"))))
+    (build-system python-build-system)
+    (arguments
+     `(;; We could possibly get tests working, but on Python 3 it's not so easy.
+       ;; Very strangely, 2to3 is run *during setup.py install* (or bdist, or
+       ;; whatever) so this transformation needs to be done before the tests
+       ;; can be run.  Maybe we could add a build step to transform beforehand
+       ;; but it could be annoying/difficult.
+       ;; We can enable tests for the Python 2 version, though, and do below.
+       #:tests? #f))
+    (home-page "https://bitbucket.org/runeh/anyjson/")
+    (synopsis
+     "Wraps best available JSON implementation in a common interface")
+    (description
+     "Anyjson loads whichever is the fastest JSON module installed
+and provides a uniform API regardless of which JSON implementation is used.")
+    (license license:bsd-3)
+    (properties `((python2-variant . ,(delay python2-anyjson))))))
+
+(define-public python2-anyjson
+  (let ((anyjson (package-with-python2
+                  (strip-python2-variant python-anyjson))))
+    (package
+      (inherit anyjson)
+      (arguments `(;; Unlike the python 3 variant, we do run tests.  See above!
+                   #:tests? #t
+                   ,@(package-arguments anyjson)))
+      (native-inputs `(("python2-nose" ,python2-nose))))))
+
+(define-public python-amqp
+  (package
+    (name "python-amqp")
+    (version "2.3.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "amqp" version))
+       (sha256
+        (base32
+         "1sv600dgqwpimr6i1g59y9hpn50mc236gdqkr7zin13kvlpx0g87"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-case" ,python-case)
+       ("python-pytest-sugar" ,python-pytest-sugar)
+       ("python-mock" ,python-mock)))
+    (propagated-inputs
+     `(("python-vine" ,python-vine)))
+    (home-page "https://github.com/celery/py-amqp")
+    (synopsis
+     "Low-level AMQP client for Python (fork of amqplib)")
+    (description
+     "This is a fork of amqplib which was originally written by Barry Pederson.
+It is maintained by the Celery project, and used by kombu as a pure python
+alternative when librabbitmq is not available.")
+    (license license:lgpl2.1+)
+    (properties `((python2-variant . ,(delay python2-amqp))))))
+
+(define-public python2-amqp
+  (let ((amqp (package-with-python2
+               (strip-python2-variant python-amqp))))
+    (package
+      (inherit amqp)
+      (arguments `(;; Tries to run coverage tests with nose-cover3, which seems
+                   ;; unmaintained.  Weirdly, does not do this on the python 3
+                   ;; version?
+                   #:tests? #f
+                   ,@(package-arguments amqp))))))
+
+(define-public python-txamqp
+  (package
+    (name "python-txamqp")
+    (version "0.8.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "txAMQP" version))
+       (sha256
+        (base32
+         "0jd9864k3csc06kipiwzjlk9mq4054s8kzk5q1cfnxj8572s4iv4"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-six" ,python-six)
+       ("python-twisted" ,python-twisted)))
+    (home-page "https://github.com/txamqp/txamqp")
+    (synopsis "Communicate with AMQP peers and brokers using Twisted")
+    (description
+     "This package provides a Python library for communicating with AMQP peers
+and brokers using the asynchronous networking framework Twisted.  It contains
+all the necessary code to connect, send and receive messages to/from an
+AMQP-compliant peer or broker (Qpid, OpenAMQ, RabbitMQ) using Twisted.  It
+also includes support for using Thrift RPC over AMQP in Twisted
+applications.")
+    (license license:asl2.0)))
+
+(define-public python2-txamqp
+  (package-with-python2 python-txamqp))
+
+(define-public python-kombu
+  (package
+    (name "python-kombu")
+    (version "4.2.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "kombu" version))
+       (sha256
+        (base32
+         "15k8f7mzqr049sg9vi48m19vjykviafk3f0p5xzgw9by0x0kyxjj"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-case" ,python-case)
+       ("python-pyro4" ,python-pyro4)
+       ("python-pytest-sugar" ,python-pytest-sugar)
+       ("python-pytz" ,python-pytz)))
+    (propagated-inputs
+     `(("python-anyjson" ,python-anyjson)
+       ("python-amqp" ,python-amqp)
+       ("python-redis" ,python-redis)))
+    (home-page "https://kombu.readthedocs.io")
+    (synopsis "Message passing library for Python")
+    (description "The aim of Kombu is to make messaging in Python as easy as
+possible by providing an idiomatic high-level interface for the AMQ protocol,
+and also provide proven and tested solutions to common messaging problems.
+AMQP is the Advanced Message Queuing Protocol, an open standard protocol for
+message orientation, queuing, routing, reliability and security, for which the
+RabbitMQ messaging server is the most popular implementation.")
+    (license license:bsd-3)
+    (properties `((python2-variant . ,(delay python2-kombu))))))
+
+(define-public python2-kombu
+  (let ((kombu (package-with-python2
+                (strip-python2-variant python-kombu))))
+    (package
+      (inherit kombu)
+      (arguments `(;; FIXME: 'TestTransport.test_del_sync' fails on python2.
+                   ;; It works fine on the python3 variant.
+                   #:tests? #f
+                   ,@(package-arguments kombu)))
+      (native-inputs `(("python2-unittest2" ,python2-unittest2)
+                ,@(package-native-inputs kombu))))))
+
+(define-public python-billiard
+  (package
+    (name "python-billiard")
+    (version "3.5.0.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "billiard" version))
+       (sha256
+        (base32
+         "03msmapj3s5zgqk87d646mafz7a01h5bm2wijalgpi0s80ks5na2"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-case" ,python-case)
+       ("python-pytest" ,python-pytest)))
+    (home-page "https://github.com/celery/billiard")
+    (synopsis
+     "Python multiprocessing fork with improvements and bugfixes")
+    (description
+     "Billiard is a fork of the Python 2.7 multiprocessing package.  The
+multiprocessing package itself is a renamed and updated version of R Oudkerk's
+pyprocessing package.  This standalone variant is intended to be compatible with
+Python 2.4 and 2.5, and will draw its fixes/improvements from python-trunk.")
+    (license license:bsd-3)
+    (properties `((python2-variant . ,(delay python2-billiard))))))
+
+(define-public python2-billiard
+  (let ((billiard (package-with-python2
+                   (strip-python2-variant python-billiard))))
+    (package
+      (inherit billiard)
+      (native-inputs `(("python2-unittest2" ,python2-unittest2)
+                       ("python2-mock" ,python2-mock)
+                       ,@(package-native-inputs billiard))))))
+
+(define-public python-celery
+  (package
+    (name "python-celery")
+    (version "4.2.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "celery" version))
+       (sha256
+        (base32
+         "0y66rz7z8dfcgs3s0qxmdddlaq57bzbgxgfz896nbp14grkv9nkp"))))
+    (build-system python-build-system)
+    (arguments
+     '(;; TODO The tests fail with Python 3.7
+       ;; https://github.com/celery/celery/issues/4849
+       #:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-requirements
+           (lambda _
+             (substitute* "requirements/test.txt"
+               (("pytest>=3\\.0,<3\\.3")
+                "pytest>=3.0"))
+             #t)))))
+    (native-inputs
+     `(("python-case" ,python-case)
+       ("python-pytest" ,python-pytest)))
+    (propagated-inputs
+     `(("python-pytz" ,python-pytz)
+       ("python-billiard" ,python-billiard)
+       ("python-kombu" ,python-kombu)))
+    (home-page "https://celeryproject.org")
+    (synopsis "Distributed Task Queue")
+    (description "Celery is an asynchronous task queue/job queue based on
+distributed message passing.  It is focused on real-time operation, but
+supports scheduling as well.  The execution units, called tasks, are executed
+concurrently on a single or more worker servers using multiprocessing,
+Eventlet, or gevent.  Tasks can execute asynchronously (in the background) or
+synchronously (wait until ready).")
+    (license license:bsd-3)
+    (properties `((python2-variant . ,(delay python2-celery))))))
+
+(define-public python2-celery
+  (let ((celery (package-with-python2
+                 (strip-python2-variant python-celery))))
+    (package
+      (inherit celery)
+      (native-inputs `(("python2-unittest2" ,python2-unittest2)
+                       ("python2-mock" ,python2-mock)
+                       ,@(package-native-inputs celery))))))
+
+(define-public python-translitcodec
+  (package
+    (name "python-translitcodec")
+    (version "0.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "translitcodec" version))
+       (sha256
+        (base32
+         "10x6pvblkzky1zhjs8nmx64nb9jdzxad4bxhq4iwv0j4z2aqjnki"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))  ; no tests provided
+    (home-page
+     "https://github.com/claudep/translitcodec")
+    (synopsis
+     "Unicode to 8-bit charset transliteration codec")
+    (description
+     "This package contains codecs for transliterating ISO 10646 texts into
+best-effort representations using smaller coded character sets (ASCII,
+ISO 8859, etc.).")
+    (license license:expat)))
+
+(define-public python2-translitcodec
+  (package-with-python2 python-translitcodec))
+
+(define-public python-editor
+  (package
+  (name "python-editor")
+  (version "0.5")
+  (source
+    (origin
+      (method url-fetch)
+      (uri (pypi-uri "python-editor" version))
+      (sha256
+        (base32
+          "1ypnpgvzpkbwsg4rdvy4sy51j28b5xq9v8pnkwxncn07vqz06p7n"))))
+  (build-system python-build-system)
+  (home-page
+    "https://github.com/fmoo/python-editor")
+  (synopsis
+    "Programmatically open an editor, capture the result")
+  (description
+    "python-editor is a library that provides the editor module for
+programmatically interfacing with your system's $EDITOR.")
+  (license license:asl2.0)))
+
+(define-public python2-editor
+  (package-with-python2 python-editor))
+
+(define-public python-sphinxcontrib-programoutput
+  (package
+    (name "python-sphinxcontrib-programoutput")
+    (version "0.10")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "sphinxcontrib-programoutput" version))
+              (sha256
+               (base32
+                "153hhnlbx4688zj9wd64819ps5znc2jlyp5crkgzvn5hxgy99vpx"))))
+    (build-system python-build-system)
+    (arguments
+     ;; FIXME: Many tests are failing and the upstream is gone.
+     '(#:tests? #f))
+    (propagated-inputs
+     `(("python-sphinx" ,python-sphinx)))
+    (synopsis "Sphinx extension to include program output")
+    (description "A Sphinx extension to literally insert the output of arbitrary
+commands into documents, helping you to keep your command examples up to date.")
+    (home-page "https://github.com/lunaryorn/sphinxcontrib-programoutput")
+    (license license:bsd-2)))
+
+(define-public python2-sphinxcontrib-programoutput
+  (package-with-python2 python-sphinxcontrib-programoutput))
+
+(define-public python-sphinx-repoze-autointerface
+  (package
+    (name "python-sphinx-repoze-autointerface")
+    (version "0.8")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "repoze.sphinx.autointerface" version))
+              (sha256
+               (base32
+                "08ycivzf7bh4a1zcyp31hbyqs1b2c9r26raa3vxjwwmbfqr3iw4f"))))
+    (build-system python-build-system)
+    (arguments '(#:tests? #f)) ; No tests.
+    (propagated-inputs
+     `(("python-sphinx" ,python-sphinx)
+       ("python-zope-interface" ,python-zope-interface)))
+    (synopsis "Auto-generate Sphinx API docs from Zope interfaces")
+    (description "This package defines an extension for the Sphinx documentation
+system.  The extension allows generation of API documentation by
+introspection of @code{zope.interface} instances in code.")
+    (home-page "https://github.com/repoze/repoze.sphinx.autointerface")
+    (license license:repoze)))
+
+(define-public python2-sphinx-repoze-autointerface
+  (package-with-python2 python-sphinx-repoze-autointerface))
+
+(define-public python-vobject
+  (package
+    (name "python-vobject")
+    (version "0.9.5")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "vobject" version))
+              (sha256
+               (base32
+                "0hqjgf3ay1m5w1c0k00g5yfpdz1zni5qnr5rh9b8fg9hjvhwlmhg"))))
+    (build-system python-build-system)
+    (arguments
+     '(;; The test suite relies on some non-portable Windows interfaces.
+       #:tests? #f))
+    (propagated-inputs
+     `(("python-dateutil" ,python-dateutil)
+       ("python-pyicu" ,python-pyicu)))
+    (synopsis "Parse and generate vCard and vCalendar files")
+    (description "Vobject is intended to be a full featured Python package for
+parsing and generating vCard and vCalendar files.  Currently, iCalendar files
+are supported and well tested. vCard 3.0 files are supported, and all data
+should be imported, but only a few components are understood in a sophisticated
+way.")
+    (home-page "http://eventable.github.io/vobject/")
+    (license license:asl2.0)))
+
+(define-public python2-vobject
+  (package-with-python2 python-vobject))
+
+(define-public python-munkres
+  (package
+    (name "python-munkres")
+    (version "1.0.8")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "munkres" version))
+              (sha256
+               (base32
+                "0mbspx4zv8id4x6pim6ybsa1xh96qwpbqj7skbqz4c9c9nf1lpqq"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; no test suite
+    (home-page "http://software.clapper.org/munkres/")
+    (synopsis "Implementation of the Munkres algorithm")
+    (description "The Munkres module provides an implementation of the Munkres
+algorithm (also called the Hungarian algorithm or the Kuhn-Munkres algorithm),
+useful for solving the Assignment Problem.")
+    (license license:bsd-3)))
+
+(define-public python2-munkres
+  (package-with-python2 python-munkres))
+
+(define-public python-whoosh
+  (package
+    (name "python-whoosh")
+    (version "2.7.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Whoosh" version))
+       (sha256
+        (base32
+         "10qsqdjpbc85fykc1vgcs8xwbgn4l2l52c8d83xf1q59pwyn79bw"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "https://bitbucket.org/mchaput/whoosh")
+    (synopsis "Full text indexing, search, and spell checking library")
+    (description
+     "Whoosh is a fast, pure-Python full text indexing, search, and spell
+checking library.")
+    (license license:bsd-2)))
+
+(define-public python2-whoosh
+  (let ((whoosh (package-with-python2 (strip-python2-variant python-whoosh))))
+    (package (inherit whoosh)
+      (propagated-inputs
+       `(("python2-backport-ssl-match-hostname"
+          ,python2-backport-ssl-match-hostname)
+          ,@(package-propagated-inputs whoosh))))))
+
+(define-public python-pathlib
+  (package
+    (name "python-pathlib")
+    (version "1.0.1")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "pathlib" version))
+              (sha256
+               (base32
+                "17zajiw4mjbkkv6ahp3xf025qglkj0805m9s41c45zryzj6p2h39"))))
+    (build-system python-build-system)
+    ;; The tests depend on the internal "test" module, which does not provide
+    ;; a stable interface.
+    (arguments `(#:tests? #f))
+    (home-page "https://pathlib.readthedocs.org/")
+    (synopsis "Object-oriented file system paths")
+    (description "Pathlib offers a set of classes to handle file system paths.
+It offers the following advantages over using string objects:
+
+@enumerate
+@item No more cumbersome use of os and os.path functions.  Everything can
+be done easily through operators, attribute accesses, and method calls.
+@item Embodies the semantics of different path types.  For example,
+comparing Windows paths ignores casing.
+@item Well-defined semantics, eliminating any inconsistencies or
+ambiguities (forward vs. backward slashes, etc.).
+@end enumerate
+
+Note: In Python 3.4, pathlib is now part of the standard library.  For other
+Python versions please consider python-pathlib2 instead, which tracks the
+standard library module.  This module (python-pathlib) isn't maintained
+anymore.")
+    (license license:expat)))
+
+(define-public python2-pathlib
+  (package-with-python2 python-pathlib))
+
+(define-public python2-pathlib2
+  (package
+    (name "python2-pathlib2")
+    (version "2.3.2")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "pathlib2" version))
+              (sha256
+               (base32
+                "10yb0iv5x2hs631rcppkhbddx799d3h8pcwmkbh2a66ns3w71ccf"))))
+    (build-system python-build-system)
+    ;; We only need the the Python 2 variant, since for Python 3 our minimum
+    ;; version is 3.4 which already includes this package as part of the
+    ;; standard library.
+    (arguments
+     `(#:python ,python-2))
+    (propagated-inputs
+     `(("python2-scandir" ,python2-scandir)
+       ("python2-six" ,python2-six)))
+    (home-page "https://pypi.python.org/pypi/pathlib2/")
+    (synopsis "Object-oriented file system paths - backport of standard
+pathlib module")
+    (description "The goal of pathlib2 is to provide a backport of standard
+pathlib module which tracks the standard library module, so all the newest
+features of the standard pathlib can be used also on older Python versions.
+
+Pathlib offers a set of classes to handle file system paths.  It offers the
+following advantages over using string objects:
+
+@enumerate
+@item No more cumbersome use of os and os.path functions.  Everything can
+be done easily through operators, attribute accesses, and method calls.
+@item Embodies the semantics of different path types.  For example,
+comparing Windows paths ignores casing.
+@item Well-defined semantics, eliminating any inconsistencies or
+ambiguities (forward vs. backward slashes, etc.).
+@end enumerate")
+    (license license:expat)))
+
+(define-public python2-pathlib2-bootstrap
+  (hidden-package
+   (package
+     (inherit python2-pathlib2)
+     (name "python2-pathlib2-bootstrap")
+     (propagated-inputs
+      `(("python2-scandir" ,python2-scandir)
+        ("python2-six" ,python2-six-bootstrap))))))
+
+(define-public python-jellyfish
+  (package
+    (name "python-jellyfish")
+    (version "0.5.6")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "jellyfish" version))
+              (sha256
+               (base32
+                "1j9rplb16ba2prjj6mip46z0w9pnhnqpwgiwi0x93vnas14rlyl8"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "https://github.com/jamesturk/jellyfish")
+    (synopsis "Approximate and phonetic matching of strings")
+    (description "Jellyfish uses a variety of string comparison and phonetic
+encoding algorithms to do fuzzy string matching.")
+    (license license:bsd-2)
+    (properties `((python2-variant . ,(delay python2-jellyfish))))))
+
+(define-public python2-jellyfish
+  (let ((jellyfish (package-with-python2
+                     (strip-python2-variant python-jellyfish))))
+    (package (inherit jellyfish)
+      (native-inputs `(("python2-unicodecsv" ,python2-unicodecsv)
+                       ,@(package-native-inputs jellyfish))))))
+
+(define-public python2-unicodecsv
+  (package
+    (name "python2-unicodecsv")
+    (version "0.14.1")
+    (source (origin
+             (method url-fetch)
+             ;; The test suite is not included in the PyPi release.
+             ;; https://github.com/jdunck/python-unicodecsv/issues/19
+             (uri (string-append "https://github.com/jdunck/python-unicodecsv/"
+                                 "archive/" version ".tar.gz"))
+             (file-name (string-append name "-" version ".tar.gz"))
+             (sha256
+              (base32
+               "087nqanfcyp6mlfbbr5lva5f3w6iz1bybls9xlrb8icmc474wh4w"))))
+    (build-system python-build-system)
+    (arguments
+     `(;; It supports Python 3, but Python 3 can already do Unicode CSV.
+       #:python ,python-2))
+    (native-inputs
+     `(("python2-unittest2" ,python2-unittest2)))
+    (home-page "https://github.com/jdunck/python-unicodecsv")
+    (synopsis "Unicode CSV module for Python 2")
+    (description "Unicodecsv is a drop-in replacement for Python 2.7's CSV
+module, adding support for Unicode strings.")
+    (license license:bsd-2)))
+
+(define-public python-rarfile
+  (package
+    (name "python-rarfile")
+    (version "2.8")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "rarfile" version))
+              (sha256
+               (base32
+                "0qfad483kcbga0bn4qmcz953xjk16r52fahiy46zzn56v80y89ra"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           ;; Many tests fail, but the installation proceeds.
+           (lambda _ (zero? (system* "make" "-C" "test" "test")))))))
+    (native-inputs
+     `(("which" ,which))) ; required for tests
+    (propagated-inputs
+     `(("libarchive" ,libarchive)))
+    (home-page "https://github.com/markokr/rarfile")
+    (synopsis "RAR archive reader for Python")
+    (description "This is Python module for RAR archive reading.  The interface
+is made as zipfile like as possible.")
+    (license license:isc)))
+
+(define-public python2-rarfile
+  (package-with-python2 python-rarfile))
+
+(define-public python-magic
+  (package
+    (name "python-magic")
+    (version "0.4.15")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "python-magic" version))
+       (sha256
+        (base32
+         "1mgwig9pnzgkf86q9ji9pnc99bngms15lfszq5rgqb9db07mqxpk"))
+       (file-name (string-append name "-" version "-checkout"))))
+    (build-system python-build-system)
+    (arguments
+     ;; The tests are unreliable, so don't run them.  The tests fail
+     ;; under Python3 because they were written for Python2 and
+     ;; contain import statements that do not work in Python3.  One of
+     ;; the tests fails under Python2 because its assertions are
+     ;; overly stringent; it relies on comparing output strings which
+     ;; are brittle and can change depending on the version of
+     ;; libmagic being used and the system on which the test is
+     ;; running.  In my case, under GuixSD 0.10.0, only one test
+     ;; failed, and it seems to have failed only because the version
+     ;; of libmagic that is packaged in Guix outputs a slightly
+     ;; different (but not wrong) string than the one that the test
+     ;; expected.
+     '(#:tests? #f
+       #:phases (modify-phases %standard-phases
+                  ;; Replace a specific method call with a hard-coded
+                  ;; path to the necessary libmagic.so file in the
+                  ;; store.  If we don't do this, then the method call
+                  ;; will fail to find the libmagic.so file, which in
+                  ;; turn will cause any application using
+                  ;; python-magic to fail.
+                  (add-before 'build 'hard-code-path-to-libmagic
+                    (lambda* (#:key inputs #:allow-other-keys)
+                      (let ((file (assoc-ref inputs "file")))
+                        (substitute* "magic.py"
+                          (("ctypes.util.find_library\\('magic'\\)")
+                           (string-append "'" file "/lib/libmagic.so'")))
+                        #t)))
+                  (add-before 'install 'disable-egg-compression
+                    (lambda _
+                      (let ((port (open-file "setup.cfg" "a")))
+                        (display "\n[easy_install]\nzip_ok = 0\n"
+                                 port)
+                        (close-port port)
+                        #t))))))
+    (inputs
+     ;; python-magic needs to be able to find libmagic.so.
+     `(("file" ,file)))
+    (home-page
+     "https://github.com/ahupp/python-magic")
+    (synopsis
+     "File type identification using libmagic")
+    (description
+     "This module uses ctypes to access the libmagic file type
+identification library.  It makes use of the local magic database and
+supports both textual and MIME-type output.  Note that this module and
+the python-file module both provide a \"magic.py\" file; these two
+modules, which are different and were developed separately, both serve
+the same purpose: to provide Python bindings for libmagic.")
+    (license license:expat)))
+
+(define-public python2-magic
+  (package-with-python2 python-magic))
+
+(define-public python2-s3cmd
+  (package
+    (name "python2-s3cmd")
+    (version "1.6.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (string-append "mirror://sourceforge/s3tools/s3cmd/" version "/"
+                            "s3cmd-" version ".tar.gz"))
+        (sha256
+          (base32
+            "0ki1rzhm5icvi9ry5jswi4b22yqwyj0d2wsqsgilwx6qhi7pjxa6"))))
+    (build-system python-build-system)
+    (arguments
+     ;; s3cmd is written for python2 only and contains no tests.
+     `(#:python ,python-2
+       #:tests? #f))
+    (propagated-inputs
+     `(("python2-dateutil" ,python2-dateutil)
+       ;; The python-file package also provides a magic.py module.
+       ;; This is an unfortunate state of affairs; however, s3cmd
+       ;; fails to install if it cannot find specifically the
+       ;; python-magic package.  Thus we include it, instead of using
+       ;; python-file.  Ironically, s3cmd sometimes works better
+       ;; without libmagic bindings at all:
+       ;; https://github.com/s3tools/s3cmd/issues/198
+       ("python2-magic" ,python2-magic)))
+    (home-page "http://s3tools.org/s3cmd")
+    (synopsis "Command line tool for S3-compatible storage services")
+    (description
+     "S3cmd is a command line tool for uploading, retrieving and managing data
+in storage services that are compatible with the Amazon Simple Storage
+Service (S3) protocol, including S3 itself.  It supports rsync-like backup,
+GnuPG encryption, and more.  It also supports management of Amazon's
+CloudFront content delivery network.")
+    (license license:gpl2+)))
+
+(define-public python-pkgconfig
+  (package
+    (name "python-pkgconfig")
+    (version "1.3.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pkgconfig" version))
+        (sha256
+          (base32
+            "107x2wmchlch8saixb488cgjz9n6inl38wi7nxkb942rbaapxiqb"))))
+    (build-system python-build-system)
+    (native-inputs
+      `(("python-nose" ,python-nose)))
+    (inputs
+      `(("pkg-config" ,pkg-config)))
+    (arguments
+      `(#:phases
+        (modify-phases %standard-phases
+          (add-before 'build 'patch
+            ;; Hard-code the path to pkg-config.
+            (lambda _
+              (substitute* "pkgconfig/pkgconfig.py"
+                (("cmd = 'pkg-config")
+                 (string-append "cmd = '" (which "pkg-config"))))
+              #t))
+          (replace 'check
+            (lambda _
+              (invoke "nosetests" "test.py"))))))
+    (home-page "https://github.com/matze/pkgconfig")
+    (synopsis "Python interface for pkg-config")
+    (description "This module provides a Python interface to pkg-config.  It
+can be used to find all pkg-config packages, check if a package exists,
+check if a package meets certain version requirements, query CFLAGS and
+LDFLAGS and parse the output to build extensions with setup.py.")
+    (license license:expat)))
+
+(define-public python2-pkgconfig
+  (package-with-python2 python-pkgconfig))
+
+(define-public python-bz2file
+  (package
+    (name "python-bz2file")
+    (version "0.98")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "bz2file" version))
+       (sha256
+        (base32
+         "126s53fkpx04f33a829yqqk8fj4png3qwg4m66cvlmhmwc8zihb4"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f)) ; Tests use deprecated python modules.
+    (home-page "https://github.com/nvawda/bz2file")
+    (synopsis "Read and write bzip2-compressed files")
+    (description
+     "Bz2file is a Python library for reading and writing bzip2-compressed
+files.  It contains a drop-in replacement for the I/O interface in the
+standard library's @code{bz2} module, including features from the latest
+development version of CPython that are not available in older releases.")
+    (license license:asl2.0)))
+
+(define-public python2-bz2file
+  (package-with-python2 python-bz2file))
+
+(define-public python-future
+  (package
+    (name "python-future")
+    (version "0.16.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "future" version))
+       (sha256
+        (base32
+         "1nzy1k4m9966sikp0qka7lirh8sqrsyainyf8rk97db7nwdfv773"))))
+    (build-system python-build-system)
+    ;; Many tests connect to the network or are otherwise flawed.
+    ;; https://github.com/PythonCharmers/python-future/issues/210
+    (arguments
+     `(#:tests? #f))
+    (home-page "http://python-future.org")
+    (synopsis "Single-source support for Python 3 and 2")
+    (description
+     "@code{python-future} is the missing compatibility layer between Python 2 and
+Python 3.  It allows you to use a single, clean Python 3.x-compatible codebase
+to support both Python 2 and Python 3 with minimal overhead.")
+    (license license:expat)))
+
+(define-public python2-future
+  (package-with-python2 python-future))
+
+(define-public python-cysignals
+  (package
+    (name "python-cysignals")
+    (version "1.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "cysignals" version ".tar.bz2"))
+        (sha256
+          (base32
+            "14cbyd9znlz6cxy1s3g6v6dv5jj45hn27pywkidd9b1zanaysqc6"))))
+    (build-system python-build-system)
+    (native-inputs
+      `(("python-cython" ,python-cython)
+        ("python-sphinx" ,python-sphinx)))
+    (inputs
+      `(("pari-gp" ,pari-gp)))
+    (arguments
+     `(#:modules ((guix build python-build-system)
+                  ((guix build gnu-build-system) #:prefix gnu:)
+                  (guix build utils))
+       ;; FIXME: Tests are executed after installation and currently fail
+       ;; when not installing into standard locations; the author is working
+       ;; on a fix.
+       #:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-before
+          'build 'configure
+          (assoc-ref gnu:%standard-phases 'configure)))))
+    (home-page
+      "https://github.com/sagemath/cysignals")
+    (synopsis
+      "Handling of interrupts and signals for Cython")
+    (description
+      "The cysignals package provides mechanisms to handle interrupts (and
+other signals and errors) in Cython code, using two related approaches,
+for mixed Cython/Python code or external C libraries and pure Cython code,
+respectively.")
+    (license license:lgpl3+)))
+
+(define-public python2-cysignals
+  (package-with-python2 python-cysignals))
+
+(define-public python2-shedskin
+ (package
+  (name "python2-shedskin")
+  (version "0.9.4")
+  (source
+    (origin
+      (method url-fetch)
+      (uri (string-append "https://github.com/shedskin/shedskin/"
+                          "releases/download/v" version
+                          "/shedskin-" version ".tgz"))
+      (sha256
+        (base32
+          "0nzwrzgw1ga8rw6f0ryq7zr9kkiavd1cqz5hzxkcbicl1dk7kz41"))))
+  (build-system python-build-system)
+  (arguments
+   `(#:python ,python-2
+     #:phases (modify-phases %standard-phases
+               (add-after 'unpack 'fix-resulting-include-libs
+                (lambda* (#:key inputs #:allow-other-keys)
+                 (let ((libgc (assoc-ref inputs "libgc"))
+                       (pcre (assoc-ref inputs "pcre")))
+                  (substitute* "shedskin/makefile.py"
+                   (("variable == 'CCFLAGS':[ ]*")
+                    (string-append "variable == 'CCFLAGS':\n"
+                                   "            line += ' -I " pcre "/include"
+                                   " -I " libgc "/include'"))
+                   (("variable == 'LFLAGS':[ ]*")
+                    (string-append "variable == 'LFLAGS':\n"
+                                   "            line += ' -L" pcre "/lib"
+                                   " -L " libgc "/lib'")))
+                  #t))))))
+  (inputs `(("pcre" ,pcre)
+            ("libgc" ,libgc)))
+  (home-page "https://shedskin.github.io/")
+  (synopsis "Experimental Python-2 to C++ Compiler")
+  (description (string-append "This is an experimental compiler for a subset of
+Python.  It generates C++ code and a Makefile."))
+  (license (list license:gpl3 license:bsd-3 license:expat))))
+
+(define-public python2-rope
+  (package
+    (name "python2-rope")
+    (version "0.10.3")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "rope" version))
+      (sha256
+        (base32
+         "18k5znhpwvrfck3yp0jmhd5j8r0f0s8bk1zh5yhs2cfgmfhbwigb"))))
+    (arguments
+     ;; Rope is currently python-2 only.
+     ;; https://github.com/python-rope/rope/issues/57
+     `(#:python ,python-2))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python2-unittest2" ,python2-unittest2)))
+    (home-page "https://github.com/python-rope/rope")
+    (synopsis "Refactoring library for Python")
+    (description "Rope is a refactoring library for Python.  It facilitates
+the renaming, moving and extracting of attributes, functions, modules, fields
+and parameters in Python 2 source code.  These refactorings can also be applied
+to occurrences in strings and comments.")
+    (license license:gpl2)))
+
+(define-public python-py3status
+  (package
+    (name "python-py3status")
+    (version "3.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "py3status" version))
+       (sha256
+        (base32
+         "0shxcfz4wcczj0mhwp4w0dvwd2fdd9bgprq8slim1519iiqzgwhq"))))
+    (build-system python-build-system)
+    (inputs
+     `(("file" ,file)))
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         ;; 'file' is used for detection of configuration file encoding
+         ;; let's make link the dependency to particular input
+         (add-before 'build 'patch-file-path
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((file-path (assoc-ref inputs "file")))
+               (substitute* "py3status/parse_config.py"
+                 (("\\['file', '-b'")
+                  (string-append "['" file-path "/bin/file', '-b'")))
+               #t))))
+       #:tests? #f)) ; TODO: Requires many libraries not in Guix.
+    (home-page "https://github.com/ultrabug/py3status")
+    (synopsis "Extensible i3status wrapper written in Python")
+    (description "py3status is an i3status wrapper which extends i3status
+functionality in a modular way, allowing you to extend your panel with your
+own code, responding to click events and updating clock every second.")
+    (license license:bsd-3)))
+
+(define-public python-tblib
+  (package
+    (name "python-tblib")
+    (version "1.3.2")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "tblib" version))
+              (sha256 (base32
+                       "1rsg8h069kqgncyv8fgzyj6qflk6j10cb78pa5jk34ixwq044vj3"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'adjust-tests
+           (lambda _
+             (when (which "python3")
+               ;; Adjust the example output to match that of Python 3.7:
+               ;; <https://github.com/ionelmc/python-tblib/issues/36>.
+               (substitute* "README.rst"
+                 (("Exception\\('fail',") "Exception('fail'"))
+               #t)))
+         (replace 'check
+           (lambda _
+             ;; Upstream runs tests after installation and the package itself
+             ;; resides in a subdirectory. Extend PYTHONPATH so it will be
+             ;; found.
+             (setenv "PYTHONPATH"
+                     (string-append (getcwd) "/build/lib:"
+                                    (getenv "PYTHONPATH")))
+             (invoke "py.test" "-vv" "tests" "README.rst"))))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-six" ,python-six)))
+    (home-page "https://github.com/ionelmc/python-tblib")
+    (synopsis "Traceback serialization library")
+    (description
+     "Traceback serialization allows you to:
+
+@enumerate
+@item Pickle tracebacks and raise exceptions with pickled tracebacks in
+different processes.  This allows better error handling when running code over
+multiple processes (imagine multiprocessing, billiard, futures, celery etc).
+
+@item Parse traceback strings and raise with the parsed tracebacks.
+@end enumerate\n")
+    (license license:bsd-3)))
+
+(define-public python2-tblib
+  (package-with-python2 python-tblib))
+
+(define-public python-greenlet
+  (package
+    (name "python-greenlet")
+    (version "0.4.15")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "greenlet" version))
+              (sha256
+               (base32
+                "1g4g1wwc472ds89zmqlpyan3fbnzpa8qm48z3z1y6mlk44z485ll"))))
+    (build-system python-build-system)
+    (home-page "https://greenlet.readthedocs.io/")
+    (synopsis "Lightweight in-process concurrent programming")
+    (description
+     "Greenlet package is a spin-off of Stackless, a version of CPython
+that supports micro-threads called \"tasklets\".  Tasklets run
+pseudo-concurrently (typically in a single or a few OS-level threads) and
+are synchronized with data exchanges on \"channels\".")
+    (license (list license:psfl license:expat))))
+
+(define-public python2-greenlet
+  (package-with-python2 python-greenlet))
+
+(define-public python-objgraph
+  (package
+    (name "python-objgraph")
+    (version "3.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "objgraph" version))
+       (sha256
+        (base32
+         "184m09am5gpbqfaiy7l0hwh476mczbrly1dffs0rw2p1d1i2q32a"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-graphviz" ,python-graphviz)))
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("graphviz" ,graphviz)))
+    (home-page "https://mg.pov.lt/objgraph/")
+    (synopsis "Draw Python object reference graphs with graphviz")
+    (description
+     "This package provides tools to draw Python object reference graphs with
+graphviz.")
+    (license license:expat)))
+
+(define-public python-gevent
+  (package
+    (name "python-gevent")
+    (version "1.3.7")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "gevent" version))
+              (sha256
+               (base32
+                "0b0fr04qdk1p4sniv87fh8z5psac60x01pv054kpgi94520g81iz"))
+              (modules '((guix build utils)))
+              (snippet
+               '(begin
+                  ;; unbunding libev and c-ares
+                  (delete-file-recursively "deps")
+                  #t))))
+    (build-system python-build-system)
+    (arguments
+     `(#:modules ((ice-9 ftw)
+                  (ice-9 match)
+                  (srfi srfi-26)
+                  (guix build utils)
+                  (guix build python-build-system))
+       #:phases (modify-phases %standard-phases
+                  (add-after 'unpack 'unpack-libev
+                    (lambda* (#:key inputs #:allow-other-keys)
+                      (mkdir-p "deps/libev")
+                      ;; FIXME: gevent requires building libev, even though
+                      ;; it only links against the proper one.
+                      (invoke "tar" "-xf" (assoc-ref inputs "libev-source")
+                              "--strip-components=1" "-C" "deps/libev")))
+                  (add-before 'patch-source-shebangs 'patch-hard-coded-paths
+                    (lambda _
+                      (substitute* "src/gevent/subprocess.py"
+                        (("/bin/sh") (which "sh")))
+                      (for-each (lambda (file)
+                                  (substitute* file
+                                    (("/bin/sh") (which "sh"))
+                                    (("/bin/true") (which "true"))))
+                                (find-files "src/greentest" "\\.py$"))
+                      #t))
+                  (add-before 'build 'do-not-use-bundled-sources
+                    (lambda* (#:key inputs #:allow-other-keys)
+                      (setenv "CONFIG_SHELL" (which "bash"))
+                      (setenv "LIBEV_EMBED" "false")
+                      (setenv "CARES_EMBED" "false")
+                      (setenv "EMBED" "false")
+
+                      (let ((greenlet (string-append
+                                       (assoc-ref inputs "python-greenlet")
+                                       "/include")))
+                        (match (scandir greenlet
+                                        (lambda (item)
+                                          (string-prefix? "python" item)))
+                          ((python)
+                           (setenv "CPATH"
+                                   (string-append greenlet "/" python)))))
+                      #t))
+                  (add-before 'check 'skip-timer-test
+                    (lambda _
+                      ;; XXX: Skip 'TestTimerResolution', which appears to be
+                      ;; unreliable.
+                      (substitute* "src/greentest/test__core_timer.py"
+                                   (("not greentest.RUNNING_ON_CI") "False"))
+                      #t))
+                  (replace 'check
+                    (lambda _
+                      ;; Make sure the build directory is on PYTHONPATH.
+                      (setenv "PYTHONPATH"
+                              (string-append
+                               (getenv "PYTHONPATH") ":"
+                               (getcwd) "/build/"
+                               (car (scandir "build" (cut string-prefix? "lib." <>)))))
+                      (with-directory-excursion "src/greentest"
+                        ;; XXX: Many tests require network access.  Instead we only
+                        ;; run known-good tests.  Unfortunately we cannot use
+                        ;; recursion here since this directory also contains
+                        ;; Python-version-specific subfolders.
+                        (apply invoke "python" "testrunner.py" "--config"
+                               "known_failures.py"
+                               (scandir "." (cut regexp-exec
+                                                 (make-regexp "test_+(subprocess|core)")
+                                                 <>)))))))))
+    (propagated-inputs
+     `(("python-greenlet" ,python-greenlet)
+       ("python-objgraph" ,python-objgraph)))
+    (native-inputs
+     `(("libev-source" ,(package-source libev))
+       ("python-six" ,python-six)))
+    (inputs
+     `(("c-ares" ,c-ares)
+       ("libev" ,libev)))
+    (home-page "http://www.gevent.org/")
+    (synopsis "Coroutine-based network library")
+    (description
+     "gevent is a coroutine-based Python networking library that uses greenlet
+to provide a high-level synchronous API on top of the libev event loop.")
+    (license license:expat)
+    (properties `((python2-variant . ,(delay python2-gevent))))))
+
+(define-public python2-gevent
+  (let ((base (package-with-python2
+               (strip-python2-variant python-gevent))))
+    (package
+      (inherit base)
+      (native-inputs `(,@(package-native-inputs python-gevent)
+                       ("python-mock" ,python2-mock))))))
+
+(define-public python-fastimport
+  (package
+    (name "python-fastimport")
+    (version "0.9.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "fastimport" version))
+        (sha256
+          (base32 "1aqjsin4rmqm7ln4j0p73fzxifws6c6ikgyhav7r137m2ixsxl43"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/jelmer/python-fastimport")
+    (synopsis "VCS fastimport parser and generator in Python")
+    (description "This package provides a parser for and generator of the Git
+@url{https://www.kernel.org/pub/software/scm/git/docs/git-fast-import.html,fastimport}
+format.")
+    (license license:gpl2+)))
+
+(define-public python2-fastimport
+  (package-with-python2 python-fastimport))
+
+(define-public python-twisted
+  (package
+    (name "python-twisted")
+    (version "17.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "Twisted" version ".tar.bz2"))
+              (sha256
+               (base32
+                "1p245mg15hkxp7hy5cyq2fgvlgjkb4cg0gwkwd148nzy1bbi3wnv"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; FIXME: Some tests are failing.
+       ;; #:phases
+       ;; (modify-phases %standard-phases
+       ;;   (replace 'check
+       ;;     (lambda _
+       ;;       (zero? (system* "./bin/trial" "twisted")))))
+    (propagated-inputs
+     `(("python-zope-interface" ,python-zope-interface)
+       ("python-incremental" ,python-incremental)
+       ("python-constantly" ,python-constantly)
+       ("python-automat" ,python-automat)))
+    (home-page "https://twistedmatrix.com/")
+    (synopsis "Asynchronous networking framework written in Python")
+    (description
+     "Twisted is an extensible framework for Python programming, with special
+focus on event-based network programming and multiprotocol integration.")
+    (license license:expat)))
+
+(define-public python2-twisted
+  (package-with-python2 python-twisted))
+
+(define-public python-pika
+  (package
+    (name "python-pika")
+    (version "0.12.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pika" version))
+        (sha256
+         (base32
+          "0ld7akgm93s8pfa4dsx9qlzlhj76zspbr5m9ms0ns09yd2w4aq9h"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pyev" ,python-pyev)
+       ("python-tornado" ,python-tornado)
+       ("python-twisted" ,python-twisted)))
+    (home-page "https://pika.readthedocs.org")
+    (synopsis "Pure Python AMQP Client Library")
+    (description
+     "Pika is a pure-Python implementation of the AMQP (Advanced Message Queuing
+Protocol) 0-9-1 protocol that tries to stay fairly independent of the underlying
+network support library.")
+    (license license:bsd-3)))
+
+(define-public python2-pika
+  (package-with-python2 python-pika))
+
+(define-public python-ply
+  (package
+    (name "python-ply")
+    (version "3.10")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "ply" version))
+        (sha256
+          (base32
+            "1jxsr1d2f732r6ljhvm827113dckwl6qwakfvpbdhcbhvpvlmscn"))))
+    (build-system python-build-system)
+    (home-page "http://www.dabeaz.com/ply/")
+    (synopsis "Python Lex & Yacc")
+    (description "PLY is a @code{lex}/@code{yacc} implemented purely in Python.
+It uses LR parsing and does extensive error checking.")
+    (license license:bsd-3)))
+
+(define-public python2-ply
+  (package-with-python2 python-ply))
+
+(define-public python-tabulate
+  (package
+    (name "python-tabulate")
+    (version "0.7.7")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "tabulate" version))
+             (sha256
+              (base32
+               "1inqhspd4frxnp08c32yndr0lc4px1xfkqah184i5w09gkhvi843"))))
+    (build-system python-build-system)
+    (arguments
+     ;; FIXME: The pypi release tarball is missing a 'test/common.py'
+     ;; and the latest release is not tagged in the upstream repository.
+     '(#:tests? #f))
+    (home-page "https://bitbucket.org/astanin/python-tabulate")
+    (synopsis "Pretty-print tabular data")
+    (description
+     "Tabulate is a library and command-line utility to pretty-print tabular
+data in Python.")
+    (license license:expat)))
+
+(define-public python2-tabulate
+  (package-with-python2 python-tabulate))
+
+(define-public python-kazoo
+  (package
+    (name "python-kazoo")
+    (version "2.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "kazoo" version))
+       (sha256
+        (base32
+         "16y213k7r8shyn2zw1k6lkzjgcrvm441pqv8scvcjixhvpbx3hm7"))))
+    (build-system python-build-system)
+    (arguments '(#:tests? #f)) ; XXX: needs zookeeper
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (home-page "https://kazoo.readthedocs.org")
+    (synopsis "High-level Zookeeper client library")
+    (description
+     "Kazoo is a Python client library for the Apache Zookeeper distributed
+application service.  It is designed to be easy to use and to avoid common
+programming errors.")
+    (license license:asl2.0)))
+
+(define-public python2-kazoo
+  (package-with-python2 python-kazoo))
+
+(define-public python-pykafka
+  (package
+    (name "python-pykafka")
+    (version "2.4.0")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                     "https://pypi.python.org/packages/8b/3e/"
+                     "384eeff406b06315738b62483fd2126c6e4f544167116b17cc04ea7d2a59/"
+                     "pykafka-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1id6sr159p6aa13bxcqyr9gln8sqg1l0ddzns5iws8kk5q1p5cfv"))))
+    (build-system python-build-system)
+    (arguments '(#:tests? #f)) ; XXX: needs zookeeper, kafka, etc.
+    (propagated-inputs
+     `(("python-gevent" ,python-gevent)
+       ("python-kazoo" ,python-kazoo)
+       ("python-tabulate" ,python-tabulate)))
+    (inputs
+     `(("librdkafka" ,librdkafka)))
+    (home-page "https://pykafka.readthedocs.io/")
+    (synopsis "Apache Kafka client for Python")
+    (description
+     "PyKafka is a client for the Apache Kafka distributed messaging system.
+It includes Python implementations of Kafka producers and consumers, which
+are optionally backed by a C extension built on librdkafka.")
+    (license license:asl2.0)))
+
+(define-public python2-pykafka
+  (package-with-python2 python-pykafka))
+
+(define-public python-wcwidth
+ (package
+  (name "python-wcwidth")
+  (version "0.1.7")
+  (source
+    (origin
+      (method url-fetch)
+      (uri (pypi-uri "wcwidth" version))
+      (sha256
+        (base32
+          "0pn6dflzm609m4r3i8ik5ni9ijjbb5fa3vg1n7hn6vkd49r77wrx"))))
+  (build-system python-build-system)
+  (home-page "https://github.com/jquast/wcwidth")
+  (synopsis "Measure number of terminal column cells of wide-character codes")
+  (description "Wcwidth measures the number of terminal column cells of
+wide-character codes.  It is useful for those implementing a terminal emulator,
+or programs that carefully produce output to be interpreted by one.  It is a
+Python implementation of the @code{wcwidth} and @code{wcswidth} C functions
+specified in POSIX.1-2001 and POSIX.1-2008.")
+  (license license:expat)))
+
+(define-public python2-wcwidth
+  (package-with-python2 python-wcwidth))
+
+(define-public python2-jsonrpclib
+  (package
+    (name "python2-jsonrpclib")
+    (version "0.1.7")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://pypi.python.org/packages/source/j/jsonrpclib/"
+                    "jsonrpclib-" version ".tar.gz"))
+              (sha256
+               (base32
+                "02vgirw2bcgvpcxhv5hf3yvvb4h5wzd1lpjx8na5psdmaffj6l3z"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f
+       #:python ,python-2))
+    (home-page "https://github.com/joshmarshall/jsonrpclib/")
+    (synopsis "Implementation of JSON-RPC specification for Python")
+    (description
+     "This library is an implementation of the JSON-RPC specification.
+It supports both the original 1.0 specification, as well as the
+new (proposed) 2.0 spec, which includes batch submission, keyword arguments,
+etc.")
+    (license license:asl2.0)))
+
+(define-public python-chai
+  (package
+    (name "python-chai")
+    (version "1.1.2")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "chai" version))
+              (sha256
+               (base32
+                "1k6n6zbgrrs83crp6mr3yqj9zlv40b8rpisyrliwsq7naml2p3gz"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/agoragames/chai")
+    (synopsis "Mocking framework for Python")
+    (description
+     "Chai provides an api for mocking, stubbing and spying your python
+objects, patterned after the Mocha library for Ruby.")
+    (license license:bsd-3)))
+
+(define-public python2-chai
+  (package-with-python2 python-chai))
+
+(define-public python-inflection
+  (package
+    (name "python-inflection")
+    (version "0.3.1")
+    (source
+     (origin (method url-fetch)
+             (uri (pypi-uri "inflection" version))
+             (sha256
+              (base32
+               "1jhnxgnw8y3mbzjssixh6qkc7a3afc4fygajhqrqalnilyvpzshq"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "https://github.com/jpvanhal/inflection")
+    (synopsis "Python string transformation library")
+    (description
+     "Inflection is a string transformation library.  It singularizes
+and pluralizes English words, and transforms strings from CamelCase to
+underscored string.")
+    (license license:expat)))
+
+(define-public python2-inflection
+  (package-with-python2 python-inflection))
+
+(define-public python-pylev
+  (package
+    (name "python-pylev")
+    (version "1.3.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "pylev" version))
+              (sha256
+               (base32
+                "1hz1x9blsbxya1y9nnhnwwdnqmakxi9mc0jkwj0rn6b1h44i0f86"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/toastdriven/pylev")
+    (synopsis "Levenshtein distance implementation in Python")
+    (description "Pure Python Levenshtein implementation, based off the
+Wikipedia code samples at
+@url{http://en.wikipedia.org/wiki/Levenshtein_distance}.")
+    (license license:bsd-3)))
+
+(define-public python2-pylev
+  (package-with-python2 python-pylev))
+
+(define-public python-cleo
+  (package
+    (name "python-cleo")
+    (version "0.6.1")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "cleo" version))
+              (sha256
+               (base32
+                "0q1cf0szr0d54am4pypzwdnm74zpladdsinad94c2fz5i06fdpf7"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(;; For testing
+       ("python-mock" ,python-mock)
+       ("python-pytest-mock" ,python-pytest-mock)
+       ("python-pytest" ,python-pytest)))
+    (propagated-inputs
+     `(("python-backpack" ,python-backpack)
+       ("python-pastel" ,python-pastel)
+       ("python-pylev" ,python-pylev)))
+    (home-page "https://github.com/sdispater/cleo")
+    (synopsis "Command-line arguments library for Python")
+    (description
+     "Cleo allows you to create command-line commands with signature in
+docstring and colored output.")
+    (license license:expat)))
+
+(define-public python2-cleo
+  (package-with-python2 python-cleo))
+
+(define-public python-lazy-object-proxy
+  (package
+    (name "python-lazy-object-proxy")
+    (version "1.3.1")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "lazy-object-proxy" version))
+              (sha256
+               (base32
+                "0yha7q9bhw857fwaby785d63mffhngl9npwzlk9i0pwlkwvbx4gb"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/ionelmc/python-lazy-object-proxy")
+    (synopsis "Lazy object proxy for python")
+    (description
+     "Lazy object proxy is an object that wraps a callable but defers the call
+until the object is actually required, and caches the result of said call.")
+    (license license:bsd-2)))
+
+(define-public python2-lazy-object-proxy
+  (package-with-python2 python-lazy-object-proxy))
+
+(define-public python-dnspython
+  (package
+  (name "python-dnspython")
+  (version "1.15.0")
+  (source (origin
+            (method url-fetch)
+            (uri (string-append "http://www.dnspython.org/kits/"
+                                version "/dnspython-" version ".tar.gz"))
+            (sha256
+             (base32
+              "0jr4v2pd90i6l1xxbss2m05psbjaxvyvvvpq44wycijpfgjqln8i"))))
+  (build-system python-build-system)
+  (arguments '(#:tests? #f)) ; XXX: requires internet access
+  (home-page "http://www.dnspython.org")
+  (synopsis "DNS toolkit for Python")
+  (description
+   "dnspython is a DNS toolkit for Python.  It supports almost all record
+types.  It can be used for queries, zone transfers, and dynamic updates.
+It supports TSIG authenticated messages and EDNS0.")
+  (license license:expat)))
+
+(define-public python2-dnspython
+  (package-with-python2 python-dnspython))
+
+(define-public python-email-validator
+  (package
+    (name "python-email-validator")
+    (version "1.0.2")
+    (source
+     (origin (method url-fetch)
+             (uri (pypi-uri "email_validator" version))
+             (sha256
+              (base32
+               "1ja9149l9ck5n45a72h3is7v476hjny5ybxbcamx1nw6iplsm7k6"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'use-dnspython
+           (lambda _
+             (substitute* "setup.py"
+               (("dnspython3") "dnspython"))
+             #t)))))
+    (propagated-inputs
+     `(("python-dnspython" ,python-dnspython)
+       ("python-idna" ,python-idna)))
+    (home-page "https://github.com/JoshData/python-email-validator")
+    (synopsis "Email address validation library for Python")
+    (description
+     "This library validates email address syntax and deliverability.")
+    (license license:cc0)))
+
+(define-public python2-email-validator
+  (package-with-python2 python-email-validator))
+
+(define-public python-ukpostcodeparser
+  (package
+    (name "python-ukpostcodeparser")
+    (version "1.0.3")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "UkPostcodeParser" version))
+              (sha256
+               (base32
+                "1jwg9z4rz51mcka1821rwgycsd0mcicyp1kiwjfa2kvg8bm9p2qd"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/hamstah/ukpostcodeparser")
+    (synopsis "UK Postcode parser for Python")
+    (description
+     "This library provides the @code{parse_uk_postcode} function for
+parsing UK postcodes.")
+    (license license:expat)))
+
+(define-public python2-ukpostcodeparser
+  (package-with-python2 python-ukpostcodeparser))
+
+(define-public python-faker
+  (package
+  (name "python-faker")
+  (version "0.7.9")
+  (source (origin
+            (method url-fetch)
+            (uri (pypi-uri "Faker" version))
+            (sha256
+             (base32
+              "1fh2p2yz0fsdr4fqwxgddwbvfb6qn6vp8yx0qwqzra27yq5d1wsm"))
+            (patches
+             (search-patches "python-faker-fix-build-32bit.patch"))
+            (modules '((guix build utils)))
+            (snippet
+             '(begin
+                (for-each delete-file (find-files "." "\\.pyc$"))
+                #t))))
+  (build-system python-build-system)
+  (arguments
+   '(#:phases
+     (modify-phases %standard-phases
+       (replace 'check
+         (lambda _
+           (zero? (system* "python" "-m" "unittest" "-v" "tests")))))))
+  (native-inputs
+   `(;; For testing
+     ("python-email-validator" ,python-email-validator)
+     ("python-mock" ,python-mock)
+     ("python-ukpostcodeparser" ,python-ukpostcodeparser)))
+  (propagated-inputs
+   `(("python-dateutil" ,python-dateutil)
+     ("python-six" ,python-six)))
+  (home-page "https://github.com/joke2k/faker")
+  (synopsis "Python package that generates fake data")
+  (description
+   "Faker is a Python package that generates fake data such as names,
+addresses, and phone numbers.")
+  (license license:expat)
+  (properties `((python2-variant . ,(delay python2-faker))))))
+
+(define-public python2-faker
+  (let ((base (package-with-python2 (strip-python2-variant
+                                     python-faker))))
+    (package
+      (inherit base)
+      (propagated-inputs
+       `(("python2-ipaddress" ,python2-ipaddress)
+         ,@(package-propagated-inputs base))))))
+
+(define-public python-pyaml
+  (package
+    (name "python-pyaml")
+    (version "18.11.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "pyaml" version))
+              (sha256
+               (base32
+                "0fi604ix8lbpj1266q7js6szm771saprdzzcdwmj43wy83694qmr"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-unidecode" ,python-unidecode)))
+    (propagated-inputs
+     `(("python-pyyaml" ,python-pyyaml)))
+    (home-page "https://github.com/mk-fg/pretty-yaml")
+    (synopsis "YAML pretty-print library for Python")
+    (description
+     "pyaml is a PyYAML based python module to produce pretty and readable
+YAML-serialized data.")
+    (license (license:non-copyleft "http://www.wtfpl.net/txt/copying/"))))
+
+(define-public python2-pyaml
+  (package-with-python2 python-pyaml))
+
+(define-public python-backpack
+  (package
+    (name "python-backpack")
+    (version "0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "backpack" version))
+       (sha256
+        (base32
+         "14rq1mvm0jda90lcx9gyyby9dvq4x3js2cmxvd6vl4686ixwyqh1"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-nose" ,python-nose)))
+    (propagated-inputs
+     `(("python-simplejson" ,python-simplejson)))
+    (home-page "https://github.com/sdispater/backpack")
+    (synopsis "Utilities for working with Python collections")
+    (description "Backpack provides some useful utilities for working with
+collections of data.")
+    (license license:expat)))
+
+(define-public python2-backpack
+  (package-with-python2 python-backpack))
+
+(define-public python-prompt-toolkit
+  (package
+    (name "python-prompt-toolkit")
+    (version "2.0.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "prompt_toolkit" version ".tar.gz"))
+       (sha256
+        (base32
+         "0fgacqk73w7s932vy46pan2yp8rvjmlkag20xvaydh9mhf6h85zx"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (delete 'check)
+         (add-after 'install 'post-install-check
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             ;; HOME is needed for the test
+             ;; "test_pathcompleter_can_expanduser".
+             (setenv "HOME" "/tmp")
+             (add-installed-pythonpath inputs outputs)
+             (invoke "py.test"))))))
+    (propagated-inputs
+     `(("python-wcwidth" ,python-wcwidth)
+       ("python-six" ,python-six)
+       ("python-pygments" ,python-pygments)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "https://github.com/jonathanslenders/python-prompt-toolkit")
+    (synopsis "Library for building command line interfaces in Python")
+    (description
+     "Prompt-Toolkit is a library for building interactive command line
+interfaces in Python.  It's like GNU Readline but it also features syntax
+highlighting while typing, out-of-the-box multi-line input editing, advanced
+code completion, incremental search, support for Chinese double-width
+characters, mouse support, and auto suggestions.")
+    (license license:bsd-3)))
+
+(define-public python2-prompt-toolkit
+  (package-with-python2 python-prompt-toolkit))
+
+(define-public python-prompt-toolkit-1
+  (package (inherit python-prompt-toolkit)
+    (version "1.0.15")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "prompt_toolkit" version ".tar.gz"))
+       (sha256
+        (base32
+         "05v9h5nydljwpj5nm8n804ms0glajwfy1zagrzqrg91wk3qqi1c5"))))))
+
+(define-public python2-prompt-toolkit-1
+  (package-with-python2 python-prompt-toolkit-1))
+
+(define-public python-jedi
+  (package
+    (name "python-jedi")
+    (version "0.13.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "jedi" version))
+       (sha256
+        (base32
+         "0j11q42g5vjkyhhjpyy8nb0gdxs78m3rpjai7p1hvgpyl9rkyjdp"))))
+    (build-system python-build-system)
+    (arguments
+     `( ;; Many tests are failing with Python 3.7.x as of version 0.13.1 (see:
+        ;; https://github.com/davidhalter/jedi/issues/1263)
+       #:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda* (#:key tests? #:allow-other-keys)
+             (when tests?
+               (invoke "py.test" "-vv")))))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-docopt" ,python-docopt)))
+    (propagated-inputs
+     `(("python-parso" ,python-parso)))
+    (home-page "https://github.com/davidhalter/jedi")
+    (synopsis "Autocompletion and static analysis library for Python")
+    (description
+     "Jedi is a static analysis tool for Python that can be used in Integrated
+Development Environments (@dfn{IDE}s) and text editors.  It understands Python
+on a deeper level than many other static analysis frameworks for Python.
+
+Jedi understands docstrings and you can use Jedi autocompletion in your REPL as
+well.")
+    (license license:expat)))
+
+(define-public python2-jedi
+  (package-with-python2 python-jedi))
+
+(define-public ptpython
+  (package
+    (name "ptpython")
+    (version "0.34")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "ptpython" version))
+              (sha256
+               (base32
+                "1mmbiyzf0n8hm7z2a562x7w5cbl6jc0zsk6vp40q1z4cyblv1k13"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; FIXME: No tests in pypi tarball.
+    (propagated-inputs
+     `(("python-docopt" ,python-docopt)
+       ("python-jedi" ,python-jedi)
+       ("python-prompt-toolkit" ,python-prompt-toolkit)
+       ("python-pygments" ,python-pygments)))
+    (home-page "https://github.com/jonathanslenders/ptpython")
+    (synopsis "Python Read-Eval-Print-Loop with nice IDE-like features")
+    (description
+     "ptpython is a Python read-eval-print loop with IDE-like features.
+It supports syntax highlighting, multiline editing, autocompletion, mouse,
+color schemes, bracketed paste, Vi and Emacs keybindings, Chinese characters
+etc.")
+    (license license:bsd-3)
+    (properties `((python2-variant . ,(delay ptpython-2))))))
+
+(define-public ptpython-2
+  (let ((base (package-with-python2 (strip-python2-variant ptpython))))
+    (package
+      (inherit base)
+      (name "ptpython2"))))
+
+(define-public python-stem
+  (package
+    (name "python-stem")
+    (version "1.7.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "stem" version))
+       (sha256
+        (base32
+         "1awiglfiajnx2hva9aqpj3fmdvdb4qg7cwnlfyih827m68y3cq8v"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (invoke "./run_tests.py" "--unit")
+             #t)))))
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-pycodestyle" ,python-pycodestyle)
+       ("python-pyflakes" ,python-pyflakes)))
+    (home-page "https://stem.torproject.org/")
+    (synopsis
+     "Python controller library that allows applications to interact with Tor")
+    (description
+     "Stem is a Python controller library for Tor.  With it you can use Tor's
+control protocol to script against the Tor process and read descriptor data
+relays publish about themselves.")
+    (license license:lgpl3)))
+
+(define-public python2-stem
+  (package-with-python2 python-stem))
+
+(define-public python-pyserial
+  (package
+    (name "python-pyserial")
+    (version "3.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pyserial" version))
+        (sha256
+          (base32
+            "0k1nfdrxxkdlv4zgaqsdv8li0pj3gbh2pyxw8q2bsg6f9490amyn"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; FIXME: 3/49 tests are failing.
+       ;; #:phases
+       ;; (modify-phases %standard-phases
+       ;;   (replace 'check
+       ;;     (lambda _
+       ;;       (zero? (system* "python" "test/run_all_tests.py" "loop://")))))))
+    (home-page
+      "https://github.com/pyserial/pyserial")
+    (synopsis "Python Serial Port Bindings")
+    (description "@code{pyserial} provide serial port bindings for Python.  It
+supports different byte sizes, stop bits, parity and flow control with RTS/CTS
+and/or Xon/Xoff.  The port is accessed in RAW mode.")
+    (license license:bsd-3)))
+
+(define-public python2-pyserial
+  (package-with-python2 python-pyserial))
+
+(define-public python-kivy
+  (package
+    (name "python-kivy")
+    (version "1.10.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Kivy" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1zzxjdp78hfjjiklzr82l4zwibwcq4j6kgicspqs6iyyfn5yisbw"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f              ; Tests require many optional packages
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'patch-generated-file-shebangs 'set-sdl-paths
+           (lambda* (#:key inputs #:allow-other-keys)
+             (setenv "KIVY_SDL2_PATH"
+                     (string-append (assoc-ref inputs "sdl-union")
+                                    "/include/SDL2"))
+             #t)))))
+    (native-inputs
+     `(("git" ,git)
+       ("pkg-config" ,pkg-config)
+       ("python-cython" ,python-cython)))
+    (inputs
+     `(("gstreamer" ,gstreamer)
+       ("mesa" ,mesa)
+       ("sdl-union"
+        ,(sdl-union (list sdl2 sdl2-image sdl2-mixer sdl2-ttf)))))
+    (home-page "http://kivy.org")
+    (synopsis
+     "Multitouch application framework")
+    (description
+     "A software library for rapid development of
+hardware-accelerated multitouch applications.")
+    (license license:expat)))
+
+(define-public python2-kivy
+  (package-with-python2 python-kivy))
+
+(define-public python-kivy-next
+  (deprecated-package "python-kivy-next" python-kivy))
+
+(define-public python2-kivy-next
+  (deprecated-package "python2-kivy-next" python2-kivy))
+
+(define-public python-binaryornot
+  (package
+    (name "python-binaryornot")
+    (version "0.4.4")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "binaryornot" version))
+              (sha256
+               (base32
+                "0qc006986rb6bcbmiymwgcl1mns2jphr1j7sr7nk41nlr7gh359m"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-chardet" ,python-chardet)
+       ("python-hypothesis" ,python-hypothesis)))
+    (home-page "https://github.com/audreyr/binaryornot")
+    (synopsis "Package to check if a file is binary or text")
+    (description "Ultra-lightweight pure Python package to check if a file is
+binary or text.")
+    (license license:bsd-3)
+    (properties `((python2-variant . ,(delay python2-binaryornot))))))
+
+(define-public python2-binaryornot
+  (let ((base (package-with-python2 (strip-python2-variant python-binaryornot))))
+    (package (inherit base)
+      (propagated-inputs
+       `(("python2-enum34" ,python2-enum34)
+         ,@(package-propagated-inputs base))))))
+
+(define-public python-nltk
+  (package
+    (name "python-nltk")
+    (version "3.2.1")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "nltk" version))
+              (sha256
+               (base32
+                "0skxbhnymwlspjkzga0f7x1hg3y50fwpfghs8g8k7fh6f4nknlym"))))
+    (build-system python-build-system)
+    (arguments
+     '(;; The tests require some extra resources to be downloaded.
+       ;; TODO Try packaging these resources.
+       #:tests? #f))
+    (home-page "http://nltk.org/")
+    (synopsis "Natural Language Toolkit")
+    (description "It provides interfaces to over 50 corpora and lexical
+resources such as WordNet, along with a suite of text processing libraries
+for classification, tokenization, stemming, tagging, parsing, and semantic
+reasoning, wrappers for natural language processing libraries.")
+    (license license:asl2.0)))
+
+(define-public python2-nltk
+  (package-with-python2 python-nltk))
+
+(define-public python-pymongo
+  (package
+    (name "python-pymongo")
+    (version "3.7.2")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "pymongo" version))
+              (sha256
+               (base32
+                "0zis4707r9hdg5qgkhp3wss9camr9h56ixyfc8n9dxwlnnly4x4c"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-certifi" ,python-certifi)))
+    (home-page "https://github.com/mongodb/mongo-python-driver")
+    (synopsis "Python driver for MongoDB")
+    (description "Python driver for MongoDB.")
+    (license license:asl2.0)))
+
+(define-public python2-pymongo
+  (package-with-python2 python-pymongo))
+
+(define-public python-sh
+  (package
+    (name "python-sh")
+    (version "1.11")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "sh" version))
+              (sha256
+               (base32
+                "192r0mpv6dmkysjzhc43ddffiwb5g7c76bgr1mb1z2xz9awbj3sr"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f)) ; no tests
+    (home-page "https://github.com/amoffat/sh")
+    (synopsis "Python subprocess interface")
+    (description "Abstracts process invocation by providing a function
+interface for programs.")
+    (license license:expat)))
+
+(define-public python2-sh
+  (package-with-python2 python-sh))
+
+(define-public python-consul
+  (package
+    (name "python-consul")
+    (version "0.6.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "python-consul" version))
+        (sha256
+         (base32
+          "0rfyxcy4cr3x848vhx876ifalxd5ghq6l5x813m49h4vq2d4jiq8"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; The tests are not distributed
+    (propagated-inputs
+     `(("python-requests" ,python-requests)
+       ("python-six" ,python-six)))
+    (home-page "https://github.com/cablehead/python-consul")
+    (synopsis "Python client for Consul")
+    (description
+     "Python client for @url{http://www.consul.io/,Consul}, a tool for service
+discovery, monitoring and configuration.")
+    (license license:expat)))
+
+(define-public python2-consul
+  (package-with-python2 python-consul))
+
+(define-public python-schematics
+  (package
+    (name "python-schematics")
+    (version "1.1.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (string-append
+               "https://github.com/schematics/schematics/archive/v" version ".tar.gz"))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+         (base32
+          "19v1i69bf3bzarfxmbv0v6ivpcn758x3shvbiy9l2hy0lvqwnp6l"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (arguments
+     `(#:tests? #f)) ; requires a bunch of not very nice packages with fixed
+                     ; version requirements (eg python-coveralls)
+    (home-page "https://github.com/schematics/schematics")
+    (synopsis "Python Data Structures for Humans")
+    (description "Python Data Structures for Humans.")
+    (license license:bsd-3)))
+
+(define-public python2-schematics
+  (package-with-python2 python-schematics))
+
+(define-public python-odfpy
+  (package
+    (name "python-odfpy")
+    (version "1.3.3")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "odfpy" version))
+              (sha256
+               (base32
+                "1a6ms0w9zfhhkqhvrnynwwbxrivw6hgjc0s5k7j06npc7rq0blxw"))))
+    (arguments
+     `(#:modules ((srfi srfi-1)
+                  (guix build python-build-system)
+                  (guix build utils))
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           ;; The test runner invokes python2 and python3 for test*.py.
+           ;; To avoid having both in inputs, we replicate it here.
+           (lambda _
+             (every (lambda (test-file)
+                      (zero? (system* "python" test-file)))
+                    (find-files "tests" "^test.*\\.py$")))))))
+    (build-system python-build-system)
+    (home-page "https://github.com/eea/odfpy")
+    (synopsis "Python API and tools to manipulate OpenDocument files")
+    (description "Collection of libraries and utility programs written in
+Python to manipulate OpenDocument 1.2 files.")
+    (license
+     ;; The software is mainly dual GPL2+ and ASL2.0, but includes a
+     ;; number of files with other licenses.
+     (list license:gpl2+ license:asl2.0 license:lgpl2.1+ license:cc-by-sa3.0))))
+
+(define-public python2-odfpy
+  (package-with-python2 python-odfpy))
+
+(define-public python-natsort
+  (package
+    (name "python-natsort")
+    (version "5.4.1")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "natsort" version))
+              (sha256
+               (base32
+                "0i732amg6yzkx4g4c9j09jmqq39q377x9cl2nbkm5hax2c2v0wxf"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:modules ((guix build utils)
+                  (guix build python-build-system)
+                  (srfi srfi-1)
+                  (srfi srfi-26)
+                  (ice-9 ftw))
+       #:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'set-cachedir
+           ;; Tests require write access to $HOME by default
+           (lambda _ (setenv "PYTHON_EGG_CACHE" "/tmp") #t))
+         (replace 'check
+           (lambda _
+             (let ((cwd (getcwd)))
+               (setenv "PYTHONPATH"
+                       (string-append
+                        cwd "/build/"
+                        (find (cut string-prefix? "lib" <>)
+                              (scandir (string-append cwd "/build")))
+                        ":"
+                        (getenv "PYTHONPATH")))
+               (invoke "pytest" "-v")))))))
+    (native-inputs
+     `(("python-hypothesis" ,python-hypothesis)
+       ("python-pytest-cov" ,python-pytest-cov)
+       ("python-pytest-mock" ,python-pytest-mock)
+       ("python-pytest" ,python-pytest)))
+    (propagated-inputs ; TODO: Add python-fastnumbers.
+     `(("python-pyicu" ,python-pyicu)))
+    (home-page "https://github.com/SethMMorton/natsort")
+    (synopsis "Natural sorting for python and shell")
+    (description
+     "Natsort lets you apply natural sorting on lists instead of
+lexicographical.  If you use the built-in @code{sorted} method in python
+on a list such as @code{['a20', 'a9', 'a1', 'a4', 'a10']}, it would be
+returned as @code{['a1', 'a10', 'a20', 'a4', 'a9']}.  Natsort provides a
+function @code{natsorted} that identifies numbers and sorts them separately
+from strings.  It can also sort version numbers, real numbers, mixed types
+and more, and comes with a shell command @command{natsort} that exposes this
+functionality in the command line.")
+    (license license:expat)
+    (properties `((python2-variant . ,(delay python2-natsort))))))
+
+(define-public python2-natsort
+  (let ((base (package-with-python2 (strip-python2-variant python-natsort))))
+    (package (inherit base)
+             (native-inputs
+              `(("python2-pathlib" ,python2-pathlib)
+                ,@(package-native-inputs base))))))
+
+(define-public python-glances
+  (package
+  (name "python-glances")
+  (version "3.0.2")
+  (source
+    (origin
+      (method url-fetch)
+      (uri (pypi-uri "Glances" version))
+      (sha256
+        (base32
+          "09fxysfp1n16csqvzvawy74qm6a94nvwjf3vcf5gkqp4i6k4vjjy"))))
+  (build-system python-build-system)
+  (propagated-inputs
+   `(("python-psutil" ,python-psutil)))
+  (home-page
+    "https://github.com/nicolargo/glances")
+  (synopsis
+    "A cross-platform curses-based monitoring tool")
+  (description
+    "Glances is a curses-based monitoring tool for a wide variety of platforms.
+Glances uses the PsUtil library to get information from your system. It monitors
+CPU, load, memory, network bandwidth, disk I/O, disk use, and more.")
+  (license license:lgpl3+)))
+
+(define-public python2-glances
+  (package-with-python2 python-glances))
+
+(define-public python-graphql-core
+  (package
+    (name "python-graphql-core")
+    (version "0.5.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "graphql-core" version))
+        (sha256
+         (base32
+          "0rsaarx2sj4xnw9966rhh4haiqaapm4lm2mfqm48ywd51j5vh1a0"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f ; Tests require the unpackaged pytest-benchmark.
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-hardcoded-version
+           (lambda _ (substitute*
+                       "setup.py"
+                       (("'gevent==1.1rc1'") "'gevent'"))
+             #t)))))
+    (native-inputs
+     `(("python-gevent" ,python-gevent)
+       ("python-mock" ,python-mock)
+       ("python-pytest-mock" ,python-pytest-mock)))
+    (propagated-inputs
+     `(("python-promise" ,python-promise)
+       ("python-six" ,python-six)))
+    (home-page "https://github.com/graphql-python/graphql-core")
+    (synopsis "GraphQL implementation for Python")
+    (description
+     "GraphQL implementation for Python.  GraphQL is a data query language and
+runtime designed and used to request and deliver data to mobile and web apps.
+This library is a port of @url{https://github.com/graphql/graphql-js,graphql-js}
+to Python.")
+    (license license:expat)))
+
+(define-public python2-graphql-core
+  (package-with-python2 python-graphql-core))
+
+(define-public python-graphql-relay
+  (package
+    (name "python-graphql-relay")
+    (version "0.4.5")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "graphql-relay" version))
+        (sha256
+         (base32
+          "1nv5dxcj59zv31qvl8bd142njmxcmymny2dz3br1l2cpbljbf5i7"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f)) ; The tests are not distributed
+    (propagated-inputs
+     `(("python-graphql-core" ,python-graphql-core)
+       ("python-promise" ,python-promise)
+       ("python-six" ,python-six)))
+    (home-page "https://github.com/graphql-python/graphql-relay-py")
+    (synopsis "Relay implementation for Python")
+    (description
+     "This is a library to allow the easy creation of Relay-compliant servers
+using the GraphQL Python reference implementation of a GraphQL server.  It
+should be noted that the code is a exact port of the original
+@url{https://github.com/graphql/graphql-relay-js,graphql-relay js implementation}
+from Facebook.")
+    (license license:expat)))
+
+(define-public python2-graphql-relay
+  (package-with-python2 python-graphql-relay))
+
+(define-public python-graphene
+  (package
+    (name "python-graphene")
+    (version "0.10.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "graphene" version))
+        (sha256
+         (base32
+          "09zhac7igh9ixdz0ay6csy35b40l1jwbf2wrbxmgxwfhy51iy06q"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-graphql-core" ,python-graphql-core)
+       ("python-graphql-relay" ,python-graphql-relay)
+       ("python-iso8601" ,python-iso8601)
+       ("python-promise" ,python-promise)
+       ("python-six" ,python-six)))
+    (arguments
+     `(#:tests? #f))                    ; no tests/ in the PyPI tarball
+    (home-page "http://graphene-python.org/")
+    (synopsis "GraphQL Framework for Python")
+    (description
+     "Graphene is a Python library for building GraphQL schemas/types.
+A GraphQL schema describes your data model, and provides a GraphQL server
+with an associated set of resolve methods that know how to fetch data.")
+    (properties `((python2-variant . ,(delay python2-graphene))))
+    (license license:expat)))
+
+(define-public python2-graphene
+  (let ((base (package-with-python2
+                (strip-python2-variant python-graphene))))
+    (package (inherit base)
+      (native-inputs
+       `(("python2-sqlalchemy" ,python2-sqlalchemy)
+         ,@(package-native-inputs base))))))
+
+(define-public python-nautilus
+  (package
+    (name "python-nautilus")
+    (version "0.4.9")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "nautilus" version))
+        (sha256
+         (base32
+          "01hwzjc1zshk4vvxrcghm398fpy4jls66dyz06g07mrwqif8878p"))))
+    (build-system python-build-system)
+    (arguments `(#:tests? #f)) ; fails to import test modules
+    (propagated-inputs
+     `(("python-bcrypt" ,python-bcrypt)
+       ("python-click" ,python-click)
+       ("python-consul" ,python-consul)
+       ("python-graphene" ,python-graphene)
+       ("python-jinja2" ,python-jinja2)
+       ("python-peewee" ,python-peewee)
+       ("python-pika" ,python-pika)
+       ("python-tornado" ,python-tornado)
+       ("python-wtforms" ,python-wtforms)))
+    (native-inputs
+     `(("python-nose2" ,python-nose2)))
+    (home-page "https://github.com/AlecAivazis/nautilus")
+    (synopsis "Library for creating microservice applications")
+    (description
+     "Nautilus is a framework for flux based microservices that looks to
+provide extendible implementations of common aspects of a cloud so that you can
+focus on building massively scalable web applications.")
+    (license license:expat)))
+
+(define-public python-snowballstemmer
+  (package
+    (name "python-snowballstemmer")
+    (version "1.2.1")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "snowballstemmer" version))
+              (sha256
+               (base32
+                "0a0idq4y5frv7qsg2x62jd7rd272749xk4x99misf5rcifk2d7wi"))))
+    (build-system python-build-system)
+    (arguments
+     `(;; No tests exist
+       #:tests? #f))
+    (home-page "https://github.com/shibukawa/snowball_py")
+    (synopsis "Snowball stemming library collection for Python")
+    (description "This package provides 16 word stemmer algorithms generated
+from Snowball algorithms.  It includes the 15 original ones plus the Poerter
+English stemmer.")
+    (license license:bsd-3)))
+
+(define-public python2-snowballstemmer
+  (package-with-python2 python-snowballstemmer))
+
+(define-public python-sphinx-cloud-sptheme
+  (package
+    (name "python-sphinx-cloud-sptheme")
+    (version "1.8.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "cloud_sptheme" version))
+              (sha256
+               (base32
+                "1dniqb6a39yh786f86c4jn666rwnyi1jvzn4616zhcchb7sfdshd"))))
+    (build-system python-build-system)
+    ;; FIXME: The 'pypi' release archive does not contain tests.
+    (arguments '(#:tests? #f))
+    (native-inputs
+     `(("python-sphinx" ,python-sphinx)))
+    (home-page "https://bitbucket.org/ecollins/cloud_sptheme")
+    (synopsis "'Cloud' theme for Sphinx documenter")
+    (description "This package contains the \"Cloud\" theme for Sphinx and some
+related extensions.")
+    (license license:bsd-3)))
+
+(define-public python2-sphinx-cloud-sptheme
+  (package-with-python2 python-sphinx-cloud-sptheme))
+
+(define-public python-sphinx-alabaster-theme
+  (package
+    (name "python-sphinx-alabaster-theme")
+    (version "0.7.12")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "alabaster" version))
+              (sha256
+               (base32
+                "00nwwjj2d2ym4s2kk217x7jkx1hnczc3fvm8yxbqmsp6b0nxfqd6"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-pygments" ,python-pygments)))
+    (home-page "https://alabaster.readthedocs.io/")
+    (synopsis "Configurable sidebar-enabled Sphinx theme")
+    (description "Alabaster is a visually (c)lean, responsive, configurable
+theme for the Sphinx documentation system.  It's the default theme of Sphinx.")
+    (license license:bsd-3)))
+
+(define-public python2-sphinx-alabaster-theme
+  (package-with-python2 python-sphinx-alabaster-theme))
+
+(define-public python-setproctitle
+(package
+  (name "python-setproctitle")
+  (version "1.1.10")
+  (source
+    (origin
+      (method url-fetch)
+      (uri (pypi-uri "setproctitle" version))
+      (sha256
+        (base32
+          "163kplw9dcrw0lffq1bvli5yws3rngpnvrxrzdw89pbphjjvg0v2"))))
+  (build-system python-build-system)
+  (arguments
+   '(#:phases
+     (modify-phases %standard-phases
+        (add-before 'check 'patch-Makefile
+           ;; Stricly this is only required for the python2 variant.
+           ;; But adding a phase in an inherited package seems to be
+           ;; cumbersum. So we patch even for python3.
+           (lambda _
+             (let ((nose (assoc-ref %build-inputs "python2-nose")))
+               (when nose
+                 (substitute* "Makefile"
+                   (("\\$\\(PYTHON\\) [^ ]which nosetests[^ ] ")
+                    (string-append nose "/bin/nosetests "))))
+               #t)))
+        (replace 'check
+           (lambda _
+             (setenv "PYTHON" (or (which "python3") (which "python")))
+             (setenv "PYCONFIG" (or (which "python3-config")
+                                    (which "python-config")))
+             (setenv "CC" "gcc")
+             ;; No need to extend PYTHONPATH to find the built package, since
+             ;; the Makefile will build anyway
+             (invoke "make" "check"))))))
+  (native-inputs
+   `(("procps" ,procps))) ; required for tests
+  (home-page
+    "https://github.com/dvarrazzo/py-setproctitle")
+  (synopsis
+   "Setproctitle implementation for Python to customize the process title")
+  (description "The library allows a process to change its title (as displayed
+by system tools such as ps and top).
+
+Changing the title is mostly useful in multi-process systems, for
+example when a master process is forked: changing the children's title
+allows to identify the task each process is busy with.  The technique
+is used by PostgreSQL and the OpenSSH Server for example.")
+  (license license:bsd-3)
+  (properties `((python2-variant . ,(delay python2-setproctitle))))))
+
+(define-public python2-setproctitle
+  (let ((base (package-with-python2
+               (strip-python2-variant python-setproctitle))))
+    (package
+      (inherit base)
+      (native-inputs `(("python2-nose" ,python2-nose)
+                       ,@(package-native-inputs base))))))
+
+(define-public python-validictory
+  (package
+    (name "python-validictory")
+    (version "1.0.1")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "validictory" version))
+      (sha256
+       (base32
+        "1zf1g9sw47xzp5f80bd94pb42j9yqv82lcrgcvdwr6nkaphfi37q"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'bootstrap
+           ;; Move the tests out of the package directory to avoid
+           ;; packaging them.
+           (lambda* _
+             (rename-file "validictory/tests" "tests")
+             (delete-file "tests/__init__.py")))
+         (replace 'check
+           (lambda _
+             ;; Extend PYTHONPATH so the built package will be found.
+             (setenv "PYTHONPATH"
+                     (string-append (getcwd) "/build/lib:"
+                                    (getenv "PYTHONPATH")))
+             (zero? (system* "py.test" "-vv" )))))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page
+     "https://github.com/jamesturk/validictory")
+    (synopsis "General purpose Python data validator")
+    (description "It allows validation of arbitrary Python data structures.
+
+The schema format is based on the JSON Schema
+proposal (http://json-schema.org), so combined with json the library is also
+useful as a validator for JSON data.")
+  (license license:expat)))
+
+(define-public python2-validictory
+  (package-with-python2 python-validictory))
+
+(define-public python-pyelftools
+  (package
+    (name "python-pyelftools")
+    (version "0.25")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pyelftools" version))
+       (sha256
+        (base32
+         "090vdksbz341f7ljvr0zswblw4lspa8qaiikzyjkf318arpxmil9"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'set-pythonpath
+           (lambda _
+             (setenv "PYTHONPATH"
+                     (string-append
+                      (getcwd) "/test/"
+                      ":" (getenv "PYTHONPATH")))
+             #t)))))
+    (home-page
+     "https://github.com/eliben/pyelftools")
+    (synopsis
+     "Analyze binary and library file information")
+    (description "This Python library provides interfaces for parsing and
+analyzing two binary and library file formats; the Executable and Linking
+Format (ELF), and debugging information in the Debugging With Attributed
+Record Format (DWARF).")
+    (license license:public-domain)))
+
+(define-public python-pyev
+  (package
+    (name "python-pyev")
+    (version "0.9.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pyev" version))
+        (sha256
+         (base32
+          "0rf603lc0s6zpa1nb25vhd8g4y337wg2wyz56i0agsdh7jchl0sx"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f ; no test suite
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((libev (string-append (assoc-ref inputs "libev")
+                                         "/lib/libev.so.4")))
+               (substitute* "setup.py"
+                 (("libev_dll_name = find_library\\(\\\"ev\\\"\\)")
+                  (string-append "libev_dll_name = \"" libev "\"")))))))))
+    (inputs
+     `(("libev" ,libev)))
+    (home-page "http://pythonhosted.org/pyev/")
+    (synopsis "Python libev interface")
+    (description "Pyev provides a Python interface to libev.")
+    (license license:gpl3)))
+
+(define-public python2-pyev
+  (package-with-python2 python-pyev))
+
+(define-public python-imagesize
+  (package
+    (name "python-imagesize")
+    (version "1.1.0")
+    (source
+      (origin
+      (method url-fetch)
+      (uri (pypi-uri "imagesize" version))
+      (sha256
+       (base32
+        "1dg3wn7qpwmhgqc0r9na2ding1wif9q5spz3j9zn2riwphc2k0zk"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/shibukawa/imagesize_py")
+    (synopsis "Gets image size of files in various formats in Python")
+    (description
+      "This package allows determination of image size from
+PNG, JPEG, JPEG2000 and GIF files in pure Python.")
+    (license license:expat)))
+
+(define-public python2-imagesize
+ (package-with-python2 python-imagesize))
+
+(define-public python-termstyle
+  (package
+    (name "python-termstyle")
+    (version "0.1.11")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "termstyle" version))
+        (sha256
+          (base32
+            "17wzkkcqy5zc0g68xlad3kcv66iw14d2pwqc0h9420gak0vbhx7g"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (zero? (system* "python" "test3.py")))))))
+    (home-page "https://github.com/gfxmonk/termstyle")
+    (synopsis "Console text coloring for Python")
+    (description "This package provides console text coloring for Python.")
+    (license license:bsd-3)))
+
+(define-public python-argcomplete
+  (package
+    (name "python-argcomplete")
+    (version "1.7.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "argcomplete" version))
+        (sha256
+          (base32
+            "11bwiw6j0nilgz81xnw6f1npyga3prp8asjqrm87cdr3ria5l03x"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pexpect" ,python-pexpect)
+       ("tcsh" ,tcsh)
+       ("bash-full" ,bash)))             ;full Bash for 'test_file_completion'
+    (home-page "https://github.com/kislyuk/argcomplete")
+    (synopsis "Shell tab completion for Python argparse")
+    (description "argcomplete provides extensible command line tab completion
+of arguments and options for Python scripts using @code{argparse}.  It's
+particularly useful for programs with many options or sub-parsers that can
+dynamically suggest completions; for example, when browsing resources over the
+network.")
+    (license license:asl2.0)))
+
+(define-public python2-argcomplete
+  (package-with-python2 python-argcomplete))
+
+(define-public python-xopen
+  (package
+    (name "python-xopen")
+    (version "0.3.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "xopen" version))
+        (sha256
+          (base32
+           "1a0wbil552wsmklwd89ssmgz3pjd86qa9i7jh8wqb9wslc8a2qjr"))
+        (file-name (string-append name "-" version ".tar.gz"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/marcelm/xopen/")
+    (synopsis "Open compressed files transparently")
+    (description "This module provides an @code{xopen} function that works like
+Python's built-in @code{open} function, but can also deal with compressed files.
+Supported compression formats are gzip, bzip2 and, xz, and are automatically
+recognized by their file extensions.  The focus is on being as efficient as
+possible on all supported Python versions.")
+    (license license:expat)))
+
+(define-public python2-xopen
+  (let ((base (package-with-python2
+               (strip-python2-variant python-xopen))))
+    (package
+      (inherit base)
+      (propagated-inputs `(("python2-bz2file" ,python2-bz2file)
+                           ,@(package-propagated-inputs base))))))
+
+(define-public python-cheetah
+  (package
+    (name "python-cheetah")
+    (version "3.1.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "Cheetah3" version))
+        (sha256
+          (base32
+           "1ihag9cxll6b86fc8v5lkhmr3brdbi4yiz16zpgw79yylmv8fgr9"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:modules ((guix build utils)
+                  (guix build python-build-system)
+                  (ice-9 ftw)
+                  (srfi srfi-1)
+                  (srfi srfi-26))
+       #:phases (modify-phases %standard-phases
+                  (add-after 'unpack 'use-absolute-python
+                    (lambda _
+                      (substitute* "Cheetah/CheetahWrapper.py"
+                        (("#!/usr/bin/env python")
+                         (string-append "#!" (which "python"))))
+                      #t))
+                  (replace 'check
+                    (lambda _
+                      (let ((cwd (getcwd)))
+                        (setenv "PYTHONPATH"
+                                (string-append
+                                 cwd "/build/"
+                                 (find (cut string-prefix? "lib" <>)
+                                       (scandir (string-append cwd "/build")))
+                                 ":" (getenv "PYTHONPATH")))
+                        (setenv "PATH"
+                                (string-append (getenv "PATH")
+                                               ":" cwd "/bin"))
+                        (setenv "TMPDIR" "/tmp")
+
+                        (substitute* "Cheetah/Tests/Test.py"
+                          (("unittest.TextTestRunner\\(\\)")
+                           "unittest.TextTestRunner(verbosity=2)"))
+
+                        (invoke "python" "Cheetah/Tests/Test.py")))))))
+    (propagated-inputs
+     `(("python-markdown" ,python-markdown)))    ;optional
+    (home-page "http://cheetahtemplate.org/")
+    (synopsis "Template engine")
+    (description "Cheetah is a text-based template engine and Python code
+generator.
+
+Cheetah can be used as a standalone templating utility or referenced as
+a library from other Python applications.  It has many potential uses,
+but web developers looking for a viable alternative to ASP, JSP, PHP and
+PSP are expected to be its principle user group.
+
+Features:
+@enumerate
+@item Generates HTML, SGML, XML, SQL, Postscript, form email, LaTeX, or any other
+   text-based format.
+@item Cleanly separates content, graphic design, and program code.
+@item Blends the power and flexibility of Python with a simple template language
+   that non-programmers can understand.
+@item Gives template writers full access to any Python data structure, module,
+   function, object, or method in their templates.
+@item Makes code reuse easy by providing an object-orientated interface to
+   templates that is accessible from Python code or other Cheetah templates.
+   One template can subclass another and selectively reimplement sections of it.
+@item Provides a simple, yet powerful, caching mechanism that can dramatically
+   improve the performance of a dynamic website.
+@item Compiles templates into optimized, yet readable, Python code.
+@end enumerate")
+    (license (license:x11-style "file://LICENSE"))))
+
+(define-public python2-cheetah
+  (package-with-python2 python-cheetah))
+
+(define-public python-dulwich
+  (package
+    (name "python-dulwich")
+    (version "0.18.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (list (string-append "https://www.dulwich.io/releases/"
+                            "dulwich-" version ".tar.gz")
+                   (pypi-uri "dulwich" version)))
+        (sha256
+          (base32
+           "1aa1xfrxkc3j9s4xi0llhf5gndyi9ryprcxsqfa5fcb8ph34981q"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'fix-tests
+           (lambda* (#:key inputs #:allow-other-keys)
+             ;; The tests use Popen with a custom environment which doesn't
+             ;; include PATH.
+             (substitute* "dulwich/tests/compat/utils.py"
+               (("'git'") (string-append "'"
+                                         (which "git")
+                                         "'")))
+             (substitute* '("dulwich/tests/test_repository.py"
+                            "dulwich/tests/test_hooks.py")
+               (("#!/bin/sh") (string-append "#!" (which "sh"))))
+             (setenv "TEST_RUNNER" "unittest")
+             (setenv "PYTHONHASHSEED" "random")
+             #t)))))
+    (propagated-inputs
+     `(("python-fastimport" ,python-fastimport)))
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-geventhttpclient" ,python-geventhttpclient)
+       ("git" ,git)))
+    (home-page "https://www.dulwich.io/")
+    (synopsis "Git implementation in Python")
+    (description "Dulwich is an implementation of the Git file formats and
+protocols written in pure Python.")
+    ;; Can be used with either license.
+    (license (list license:asl2.0 license:gpl2+))))
+
+(define-public python2-dulwich
+  (package-with-python2 python-dulwich))
+
+(define-public python-pbkdf2
+  (package
+    (name "python-pbkdf2")
+    (version "1.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pbkdf2" version))
+       (sha256
+        (base32
+         "0yb99rl2mbsaamj571s1mf6vgniqh23v98k4632150hjkwv9fqxc"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (setenv "PYTHONPATH"
+                     (string-append (getcwd) "/build/lib:"
+                                    (getenv "PYTHONPATH")))
+             (zero? (system* "python" "test/test_pbkdf2.py")))))))
+    (propagated-inputs
+     `(("python-pycrypto" ,python-pycrypto)))  ; optional
+    (home-page "https://www.dlitz.net/software/python-pbkdf2/")
+    (synopsis "Password-based key derivation")
+    (description "This module implements the password-based key derivation
+function, PBKDF2, specified in RSA PKCS#5 v2.0.
+
+PKCS#5 v2.0 Password-Based Key Derivation is a key derivation function which
+is part of the RSA Public Key Cryptography Standards series.  The provided
+implementation takes a password or a passphrase and a salt value (and
+optionally a iteration count, a digest module, and a MAC module) and provides
+a file-like object from which an arbitrarly-sized key can be read.")
+    (license license:expat)))
+
+(define-public python2-pbkdf2
+  (package-with-python2 python-pbkdf2))
+
+(define-public python-qrcode
+  (package
+    (name "python-qrcode")
+    (version "6.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "qrcode" version))
+       (sha256
+        (base32
+         "1gz1g2n9kqwqkak78aavr354z1v3yyiksk7q6xp5hi1zr6s0syq3"))))
+    (build-system python-build-system)
+    (arguments
+     ;; FIXME: Tests require packaging 'pymaging'.
+     '(#:tests? #f))
+    (propagated-inputs
+     `(("python-lxml" ,python-lxml)     ; for SVG output
+       ("python-pillow" ,python-pillow) ; for PNG output
+       ("python-six" ,python-six)))
+    (inputs
+     `(;; The setup.cfg file needs to be used, and support for this requires
+       ;; at least version 30.3.0 of setuptools
+       ("python-setuptools" ,python-setuptools)))
+    (home-page "https://github.com/lincolnloop/python-qrcode")
+    (synopsis "QR Code image generator")
+    (description "This package provides a pure Python QR Code generator
+module.  It uses the Python Imaging Library (PIL) to allow for the generation
+of QR Codes.
+
+In addition this package provides a command line tool to generate QR codes and
+either write these QR codes to a file or do the output as ascii art at the
+console.")
+    (license license:bsd-3)))
+
+(define-public python2-qrcode
+  (package-with-python2 python-qrcode))
+
+(define-public python-rst2ansi
+  (package
+    (name "python-rst2ansi")
+    (version "0.1.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "rst2ansi" version))
+       (sha256
+        (base32
+         "0vzy6gd60l79ff750scl0sz48r1laalkl6md6dwzah4dcadgn5qv"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-docutils" ,python-docutils)))
+    (home-page "https://github.com/Snaipe/python-rst-to-ansi")
+    (synopsis "Convert RST to ANSI-decorated console output")
+    (description
+     "Python module dedicated to rendering RST (reStructuredText) documents
+to ansi-escaped strings suitable for display in a terminal.")
+    (license license:expat)))
+
+(define-public python-ansi2html
+  (package
+    (name "python-ansi2html")
+    (version "1.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ansi2html" version))
+       (sha256
+        (base32
+         "1wa00zffprb78w1mqq90dk47czz1knanys2a40zbw2vyapd5lp9y"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-nose" ,python-nose)))
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (home-page "https://github.com/ralphbean/ansi2html")
+    (synopsis "Convert ANSI-decorated console output to HTML")
+    (description
+     "@command{ansi2html} is a Python library and command line utility for
+convering text with ANSI color codes to HTML or LaTeX.")
+    (license license:gpl3+)))
+
+(define-public python2-ansi2html
+  (package-with-python2 python-ansi2html))
+
+(define-public python-ddt
+  (package
+    (name "python-ddt")
+    (version "1.1.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ddt" version))
+       (sha256
+        (base32
+         "1lw17420iimhghkgzgax85nn8d1an2d6k2cfvb7j5kwn2dqlr1vk"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-nose" ,python-nose)))
+    (propagated-inputs
+     `(("python-six" ,python-six)
+       ("python-pyyaml" ,python-pyyaml)))
+    (home-page "https://github.com/txels/ddt")
+    (synopsis "Data-Driven Tests")
+    (description
+     "Data-Driven Tests (@dfn{DDT}) allow you to multiply one test case by
+running it with different test data, and make it appear as multiple test
+cases.")
+    (license license:expat)))
+
+(define-public python2-ddt
+  (package-with-python2 python-ddt))
+
+(define-public python-pycountry
+  (package
+    (name "python-pycountry")
+    (version "18.5.26")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pycountry" version))
+       (sha256
+        (base32
+         "15q9j047s3yc9cfcxq1ch8b71f81na44cr6dydd5gxk0ki9a4akz"))))
+    (build-system python-build-system)
+    (home-page "https://bitbucket.org/flyingcircus/pycountry")
+    (synopsis "ISO databases for languages, countries, currencies, etc.")
+    (description
+     "@code{pycountry} provides the ISO databases for the standards:
+@enumerate
+@item 639-3 (Languages)
+@item 3166 (Countries)
+@item 3166-3 (Deleted Countries)
+@item 3166-2 (Subdivisions of countries)
+@item 4217 (Currencies)
+@item 15924 (Scripts)
+@end enumerate
+It includes a copy from Debian’s pkg-isocodes and makes the data accessible
+through a Python API.")
+    (license license:lgpl2.1+)))
+
+(define-public python2-pycountry
+  (package-with-python2 python-pycountry))
+
+(define-public python-pycosat
+  (package
+    (name "python-pycosat")
+    (version "0.6.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pycosat" version))
+       (sha256
+        (base32
+         "1kl3wh1f47rc712n4bmwplbx3fqz3x9i1b587jrbpmvdva4c8f6l"))))
+    ;; TODO: Unundle picosat. http://fmv.jku.at/picosat/
+    (build-system python-build-system)
+    (home-page "https://github.com/ContinuumIO/pycosat")
+    (synopsis "Bindings to picosat (a SAT solver)")
+    (description
+     "This package provides efficient Python bindings to @code{picosat} on
+the C level.  When importing pycosat, the @code{picosat} solver becomes part
+of the Python process itself.  @code{picosat} is a @dfn{Boolean Satisfiability
+Problem} (SAT) solver.")
+    (license license:expat)))
+
+(define-public python2-pycosat
+  (package-with-python2 python-pycosat))
+
+(define-public python2-ruamel.ordereddict
+  (package
+    (name "python2-ruamel.ordereddict")
+    (version "0.4.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ruamel.ordereddict" version))
+       (sha256
+        (base32
+         "1xmkl8v9l9inm2pyxgc1fm5005yxm7fkd5gv74q7lj1iy5qc8n3h"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:phases
+       (modify-phases %standard-phases
+         (delete 'check)
+         (add-after 'install 'check
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (add-installed-pythonpath inputs outputs)
+             (zero? (system* "python" "test/testordereddict.py")))))))
+    (home-page "https://bitbucket.org/ruamel/ordereddict")
+    (synopsis "Version of dict that keeps keys in insertion order")
+    (description
+     "This is an implementation of an ordered dictionary with @dfn{Key
+Insertion Order} (KIO: updates of values do not affect the position of the
+key), @dfn{Key Value Insertion Order} (KVIO, an existing key's position is
+removed and put at the back).  The standard library module @code{OrderedDict},
+implemented later, implements a subset of @code{ordereddict} functionality.
+Sorted dictionaries are also provided.  Currently only with @dfn{Key Sorted
+Order} (KSO, no sorting function can be specified, but a transform can be
+specified to apply on the key before comparison (e.g. @code{string.lower})).")
+    (license license:expat)))
+
+(define-public python-pypeg2
+  (package
+    (name "python-pypeg2")
+    (version "2.15.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pyPEG2" version))
+       (sha256
+        (base32
+         "0v8ziaam2r637v94ra4dbjw6jzxz99gs5x4i585kgag1v204yb9b"))))
+    (build-system python-build-system)
+    (propagated-inputs `(("python-lxml" ,python-lxml)))
+    (arguments
+     ;;https://bitbucket.org/fdik/pypeg/issues/36/test-failures-on-py35
+     '(#:tests? #f))
+    (home-page "https://fdik.org/pyPEG/")
+    (synopsis "Parsering Expression Grammars in Python")
+    (description "PyPEG is an intrinsic parser interpreter framework for
+Python.  It is based on Parsing Expression Grammars, PEG.  With pyPEG you can
+parse many formal languages.")
+    (license license:gpl2)))
+
+(define-public python-incremental
+  (package
+    (name "python-incremental")
+    (version "17.5.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "incremental" version))
+       (sha256
+        (base32
+         "1cylxdz1cnkm5g3pklna3h2n0i0rks95ir1pnpxfnvpkmab1cxbv"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/hawkowl/incremental")
+    (synopsis "Library for versioning Python projects")
+    (description "Incremental is a small library that versions your Python
+projects.")
+    (license license:expat)))
+
+(define-public python2-incremental
+  (package-with-python2 python-incremental))
+
+(define-public python-invoke
+  (package
+    (name "python-invoke")
+    (home-page "http://www.pyinvoke.org/")
+    (version "1.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "invoke" version))
+              (sha256
+               (base32
+                "0aiy1xvk1f91246zxd1zqrm679vdvd10h843a2na41cqr3cflpi6"))))
+    (build-system python-build-system)
+    (arguments
+     ;; XXX: Requires many dependencies that are not yet in Guix.
+     `(#:tests? #f))
+    (synopsis "Pythonic task execution")
+    (description
+     "Invoke is a Python task execution tool and library, drawing inspiration
+from various sources to arrive at a powerful and clean feature set.  It is
+evolved from the Fabric project, but focuses on local and abstract concerns
+instead of servers and network commands.")
+    (license license:bsd-3)))
+
+(define-public python2-invoke
+  (package-with-python2 python-invoke))
+
+(define-public python-automat
+  (package
+    (name "python-automat")
+    (version "0.6.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "Automat" version))
+              (sha256
+               (base32
+                "1a7nsrljysfmdqmpn2apfa1gg6rfah4y9sizvns8gb08rx7d07rw"))))
+    (build-system python-build-system)
+    ;; We disable the tests because they require python-twisted, while
+    ;; python-twisted depends on python-automat.  Twisted is optional, but the
+    ;; tests fail if it is not available.  Also see
+    ;; <https://github.com/glyph/automat/issues/71>.
+    (arguments '(#:tests? #f))
+    (native-inputs
+     `(("python-m2r" ,python-m2r)
+       ("python-setuptools-scm" ,python-setuptools-scm)
+       ("python-graphviz" ,python-graphviz)))
+    (propagated-inputs
+     `(("python-six" ,python-six)
+       ("python-attrs" ,python-attrs)))
+    (home-page "https://github.com/glyph/Automat")
+    (synopsis "Self-service finite-state machines")
+    (description "Automat is a library for concise, idiomatic Python
+expression of finite-state automata (particularly deterministic finite-state
+transducers).")
+    (license license:expat)))
+
+(define-public python2-automat
+  (package-with-python2 python-automat))
+
+(define-public python-m2r
+  (package
+    (name "python-m2r")
+    (version "0.1.12")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "m2r" version))
+              (sha256
+               (base32
+                "1axrwnf425sz4qz3c0qc7yhhki4myzb8rki7pczcsgzznzmqdyxd"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-docutils" ,python-docutils)
+       ("python-mistune" ,python-mistune)))
+    (native-inputs
+     `(("python-pygments" ,python-pygments)
+       ("python-mock" ,python-mock)))
+    (home-page "https://github.com/miyakogi/m2r")
+    (synopsis "Markdown to reStructuredText converter")
+    (description "M2R converts a markdown file including reST markups to valid
+reST format.")
+    (license license:expat)))
+
+(define-public python2-m2r
+  (package-with-python2 python-m2r))
+
+(define-public python-constantly
+  (package
+    (name "python-constantly")
+    (version "15.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "constantly" version))
+              (sha256
+               (base32
+                "0dgwdla5kfpqz83hfril716inm41hgn9skxskvi77605jbmp4qsq"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/twisted/constantly")
+    (synopsis "Symbolic constants in Python")
+    (description "Constantly is a Python library that provides symbolic
+constant support.  It includes collections and constants with text, numeric,
+and bit flag values.")
+    (license license:expat)))
+
+(define-public python2-constantly
+  (package-with-python2 python-constantly))
+
+(define-public python-attrs
+  (package
+    (name "python-attrs")
+    (version "18.2.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "attrs" version))
+              (sha256
+               (base32
+                "0s9ydh058wmmf5v391pym877x4ahxg45dw6a0w4c7s5wgpigdjqh"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:modules ((guix build utils)
+                  (guix build python-build-system)
+                  (ice-9 ftw)
+                  (srfi srfi-1)
+                  (srfi srfi-26))
+       #:phases (modify-phases %standard-phases
+                  (replace 'check
+                    (lambda _
+                      (let ((cwd (getcwd)))
+                        (setenv "PYTHONPATH"
+                                (string-append
+                                 cwd "/build/"
+                                 (find (cut string-prefix? "lib" <>)
+                                       (scandir (string-append cwd "/build")))
+                                 ":"
+                                 (getenv "PYTHONPATH")))
+                        (invoke "python" "-m" "pytest")))))))
+    (native-inputs
+     `(("python-coverage" ,python-coverage)
+       ("python-hypothesis" ,python-hypothesis)
+       ("python-pympler" ,python-pympler)
+       ("python-pytest" ,python-pytest)
+       ("python-six" ,python-six)
+       ("python-sphinx" ,python-sphinx)
+       ("python-zope-interface" ,python-zope-interface)))
+    (home-page "https://github.com/python-attrs/attrs/")
+    (synopsis "Attributes without boilerplate")
+    (description "@code{attrs} is a Python package with class decorators that
+ease the chores of implementing the most common attribute-related object
+protocols.")
+    (license license:expat)))
+
+(define-public python2-attrs
+  (package-with-python2 python-attrs))
+
+(define-public python-attrs-bootstrap
+  (package
+    (inherit python-attrs)
+    (name "python-attrs-bootstrap")
+    ;; Keep this on a fixed version so python-attrs can be updated without
+    ;; triggering a mass-rebuild.  FIXME: Update this in the next rebuild cycle.
+    (version "17.4.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "attrs" version))
+              (sha256
+               (base32
+                "1jafnn1kzd6qhxgprhx6y6ik1r5m2rilx25syzcmq03azp660y8w"))))
+    (native-inputs `())
+    (arguments `(#:tests? #f))))
+
+(define-public python2-attrs-bootstrap
+  (package-with-python2 python-attrs-bootstrap))
+
+(define-public python2-cliapp
+  (package
+    (name "python2-cliapp")
+    (version "1.20170823")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "http://git.liw.fi/cgi-bin/cgit/cgit.cgi/cliapp/snapshot/cliapp-"
+             version ".tar.gz"))
+       (sha256
+        (base32
+         "1i9gik0xrj6jmi95s5w988jl1y265baz5xm5pbqdyvsh8h9ln6yq"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:phases
+       (modify-phases %standard-phases
+         ;; check phase needs to be run before the build phase. If not,
+         ;; coverage-test-runner looks for tests for the built source files,
+         ;; and fails.
+         (delete 'check)
+         (add-before 'build 'check
+           (lambda _
+             ;; Disable python3 tests
+             (substitute* "check"
+               (("python3") "# python3"))
+             (zero? (system* "./check")))))))
+    (native-inputs
+     `(("python2-coverage-test-runner" ,python2-coverage-test-runner)
+       ("python2-pep8" ,python2-pep8)))
+    (propagated-inputs
+     `(("python2-pyaml" ,python2-pyaml)))
+    (home-page "https://liw.fi/cliapp/")
+    (synopsis "Python framework for command line programs")
+    (description "@code{python2-cliapp} is a python framework for
+command line programs.  It contains the typical stuff such programs
+need to do, such as parsing the command line for options, and
+iterating over input files.")
+    (license license:gpl2+)))
+
+(define-public python2-ttystatus
+  (package
+    (name "python2-ttystatus")
+    (version "0.35")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "http://git.liw.fi/cgi-bin/cgit/cgit.cgi/ttystatus/snapshot/ttystatus-"
+             version ".tar.gz"))
+       (sha256
+        (base32
+         "0vivqbw7ddhsq1zj3g9cvvv4f0phl0pis2smsnwcr2szz2fk3hl6"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python2-coverage-test-runner" ,python2-coverage-test-runner)
+       ("python2-pep8" ,python2-pep8)))
+    (arguments
+     `(#:python ,python-2
+       #:phases
+       (modify-phases %standard-phases
+         ;; check phase needs to be run before the build phase. If not,
+         ;; coverage-test-runner looks for tests for the built source files,
+         ;; and fails.
+         (delete 'check)
+         (add-before 'build 'check
+           (lambda _
+             (zero? (system* "make" "check")))))))
+    (home-page "https://liw.fi/ttystatus/")
+    (synopsis "Python library for showing progress reporting and
+status updates on terminals")
+    (description "@code{python2-ttystatus} is a python library for
+showing progress reporting and status updates on terminals, for
+command line programs.  Output is automatically adapted to the width
+of the terminal: truncated if it does not fit, and resized if the
+terminal size changes.")
+    (license license:gpl3+)))
+
+(define-public python2-tracing
+  (package
+    (name "python2-tracing")
+    (version "0.10")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "http://git.liw.fi/cgi-bin/cgit/cgit.cgi/python-tracing/snapshot/tracing-"
+             version ".tar.gz"))
+       (sha256
+        (base32
+         "06cw4zg42fsvqy372vi2whj26w56vzg5axhzwdjc2bgwf03garbw"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2))
+    (home-page "https://liw.fi/tracing/")
+    (synopsis "Python debug logging helper")
+    (description "@code{python2-tracing} is a python library for
+logging debug messages.  It provides a way to turn debugging messages
+on and off, based on the filename they occur in.  It is much faster
+than using @code{logging.Filter} to accomplish the same thing, which
+matters when code is run in production mode.  The actual logging still
+happens using the @code{logging} library.")
+    (license license:gpl3+)))
+
+(define-public python2-larch
+  (package
+    (name "python2-larch")
+    (version "1.20151025")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "http://git.liw.fi/cgi-bin/cgit/cgit.cgi/larch/snapshot/larch-"
+             version ".tar.gz"))
+       (patches (search-patches
+                 "python2-larch-coverage-4.0a6-compatibility.patch"))
+       (sha256
+        (base32
+         "1p4knkkavlqymgciz2wbcnfrdgdbafhg14maplnk4vbw0q8xs663"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:phases
+       (modify-phases %standard-phases
+         ;; check phase needs to be run before the build phase. If not,
+         ;; coverage-test-runner looks for tests for the built source files,
+         ;; and fails.
+         (delete 'check)
+         (add-before 'build 'check
+           (lambda _
+             (zero? (system* "make" "check")))))))
+    (native-inputs
+     `(("cmdtest" ,cmdtest)
+       ("python2-coverage-test-runner" ,python2-coverage-test-runner)))
+    (propagated-inputs
+     `(("python2-tracing" ,python2-tracing)))
+    (home-page "https://liw.fi/larch/")
+    (synopsis "Python copy-on-write B-tree library")
+    (description "@code{python2-larch} is an implementation of
+particular kind of B-tree, based on research by Ohad Rodeh.  See
+@url{http://liw.fi/larch/ohad-btrees-shadowing-clones.pdf} for details
+on the data structure.
+
+The distinctive feature of this B-tree is that a node is never
+(conceptually) modified.  Instead, all updates are done by
+copy-on-write.  This makes it easy to clone a tree, and modify only the
+clone, while other processes access the original tree.")
+    (license license:gpl3+)))
+
+(define-public python-astroid
+  (package
+    (name "python-astroid")
+    (version "2.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "astroid" version))
+       (sha256
+        (base32
+         "08hz675knh4294bancdapql392fmbjyimhbyrmfkz1ka7l035c1m"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-lazy-object-proxy" ,python-lazy-object-proxy)
+       ("python-six" ,python-six)
+       ("python-wrapt" ,python-wrapt)))
+    (native-inputs
+     `(("python-dateutil" ,python-dateutil)
+       ("python-nose" ,python-nose)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'remove-spurious-test
+           (lambda _
+             ;; This can be removed after upgrading from python-3.7
+             ;; https://github.com/PyCQA/astroid/issues/593
+             ;; https://bugs.python.org/issue34056
+             (delete-file "astroid/tests/unittest_modutils.py")
+             #t))
+         (replace 'check
+           (lambda _
+             (invoke "pytest" "astroid"))))))
+    (home-page "https://github.com/PyCQA/astroid")
+    (synopsis "Common base representation of python source code for pylint and
+other projects")
+    (description "@code{python-astroid} provides a common base representation
+of python source code for projects such as pychecker, pyreverse, pylint, etc.
+
+It provides a compatible representation which comes from the _ast module.  It
+rebuilds the tree generated by the builtin _ast module by recursively walking
+down the AST and building an extended ast.  The new node classes have
+additional methods and attributes for different usages.  They include some
+support for static inference and local name scopes.  Furthermore, astroid
+builds partial trees by inspecting living objects.")
+    (license license:lgpl2.1+)
+    (properties `((python2-variant . ,(delay python2-astroid))))))
+
+(define-public python2-astroid
+  (let ((base (package-with-python2
+               (strip-python2-variant python-astroid))))
+    (package (inherit base)
+    ;; Version 2.x removes python2 support.
+    (version "1.6.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "astroid" version))
+       (sha256
+        (base32
+         "0fir4b67sm7shcacah9n61pvq313m523jb4q80sycrh3p8nmi6zw"))))
+    (arguments
+      (substitute-keyword-arguments (package-arguments base)
+        ((#:phases phases)
+         `(modify-phases ,phases
+            (add-after 'unpack 'remove-spurious-test
+              (lambda _
+                ;; https://github.com/PyCQA/astroid/issues/276
+                (delete-file "astroid/tests/unittest_brain.py")
+                #t))
+            (replace 'check
+              (lambda _
+                (invoke"python" "-m" "unittest" "discover"
+                                "-p" "unittest*.py")))))))
+    (native-inputs `())
+    (propagated-inputs
+      `(("python2-backports-functools-lru-cache"
+         ,python2-backports-functools-lru-cache)
+        ("python2-enum34" ,python2-enum34)
+        ("python2-singledispatch" ,python2-singledispatch)
+        ,@(package-propagated-inputs base))))))
+
+(define-public python-isort
+  (package
+    (name "python-isort")
+    (version "4.2.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://github.com/timothycrosley/isort/archive/"
+             version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0zsrgkb0krn5476yncy5dd56k7dk34zqb4bnlvwy44ixgilyjmfh"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-pytest" ,python-pytest)))
+    (home-page "https://github.com/timothycrosley/isort")
+    (synopsis "Python utility/library to sort python imports")
+    (description "@code{python-isort} is a python utility/library to sort
+imports alphabetically, and automatically separated into sections.  It
+provides a command line utility, a python library and plugins for various
+editors.")
+    (license license:expat)))
+
+(define-public python2-isort
+  (package-with-python2 python-isort))
+
+(define-public python2-backports-functools-lru-cache
+  (package
+    (name "python2-backports-functools-lru-cache")
+    (version "1.5")
+    (source
+     (origin
+       (method url-fetch)
+       ;; only the pypi tarballs contain the necessary metadata
+       (uri (pypi-uri "backports.functools_lru_cache" version))
+       (sha256
+        (base32
+         "06jgv8gib4fhky0p5cmxdghvsgjyzcdgk48k8pxb1ccf11znk64x"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python2-setuptools-scm" ,python2-setuptools-scm)))
+    (arguments
+     `(#:python ,python-2))
+    (home-page "https://github.com/jaraco/backports.functools_lru_cache")
+    (synopsis "Backport of functools.lru_cache from Python 3.3")
+    (description "@code{python2-backports-functools-lru-cache} is a backport
+of @code{functools.lru_cache} from python 3.3.")
+    (license license:expat)))
+
+(define-public python-configparser
+  (package
+    (name "python-configparser")
+    (version "3.5.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append
+             "https://bitbucket.org/ambv/configparser/get/"
+             version ".tar.bz2"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0waq40as14abwzbb321hfz4vr1fi363nscy32ga14qvfygrg96wa"))))
+    (build-system python-build-system)
+    (home-page "http://docs.python.org/py3k/library/configparser.html")
+    (synopsis "Backport of configparser from python 3.5")
+    (description "@code{python-configparser} is a backport of
+@code{configparser} from Python 3.5 so that it can be used directly
+in other versions.")
+    (license license:expat)))
+
+(define-public python2-configparser
+  (package-with-python2 python-configparser))
+
+(define-public python-mando
+  (package
+    (name "python-mando")
+    (version "0.6.4")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "mando" version))
+              (sha256
+               (base32
+                "0q6rl085q1hw1wic52pqfndr0x3nirbxnhqj9akdm5zhq2fv3zkr"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-rst2ansi" ,python-rst2ansi)
+       ("python-six" ,python-six)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "https://mando.readthedocs.org/")
+    (synopsis
+     "Wrapper around argparse, allowing creation of complete CLI applications")
+    (description
+     "This package is a wrapper around argparse, allowing you to write complete CLI
+applications in seconds while maintaining all the flexibility.")
+    (license license:expat)))
+
+(define-public python2-mando
+  (package-with-python2 python-mando))
+
+(define-public python-fudge
+  (package
+    (name "python-fudge")
+    ;; 0.9.6 is the latest version suitable for testing the "fabric" Python 2
+    ;; package, which is currently the only use of this package.
+    (version "0.9.6")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "fudge" version))
+       (sha256
+        (base32
+         "185ia3vr3qk4f2s1a9hdxb8ci4qc0x0xidrad96pywg8j930qs9l"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))     ;XXX: Tests require the NoseJS Python package.
+    (home-page "https://github.com/fudge-py/fudge")
+    (synopsis "Replace real objects with fakes/mocks/stubs while testing")
+    (description
+     "Fudge is a Python module for using fake objects (mocks and stubs) to
+test real ones.
+
+In readable Python code, you declare the methods available on your fake object
+and how they should be called.  Then you inject that into your application and
+start testing.  This declarative approach means you don’t have to record and
+playback actions and you don’t have to inspect your fakes after running code.
+If the fake object was used incorrectly then you’ll see an informative
+exception message with a traceback that points to the culprit.")
+    (license license:expat)))
+
+(define-public python2-fudge
+  (package-with-python2 python-fudge))
+
+(define-public python-mwclient
+  (package
+    (name "python-mwclient")
+    (version "0.8.4")
+    (source
+     (origin
+       (method url-fetch)
+       ;; The PyPI version wouldn't contain tests.
+       (uri (string-append "https://github.com/mwclient/mwclient/archive/"
+                           "v" version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1jj0yhilkjir00719fc7w133x7hdyhkxhk6xblla4asig45klsfv"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-requests" ,python-requests)
+       ("python-requests-oauthlib"
+        ,python-requests-oauthlib)
+       ("python-six" ,python-six)))
+    (native-inputs
+     `(("python-mock" ,python-mock)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-pep8" ,python-pytest-pep8)
+       ("python-pytest-cache" ,python-pytest-cache)
+       ("python-pytest-cov" ,python-pytest-cov)
+       ("python-responses" ,python-responses)))
+    (home-page "https://github.com/btongminh/mwclient")
+    (synopsis "MediaWiki API client")
+    (description "This package provides a MediaWiki API client.")
+    (license license:expat)))
+
+(define-public python2-mwclient
+  (package-with-python2 python-mwclient))
+
+(define-public python-utils
+  (package
+    (name "python-utils")
+    (version "2.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "python-utils" version))
+              (sha256
+               (base32
+                "1mcsy6q5am4ya72rgkpb6kax6vv7c93cfkkas89xnpa4sj9zf28p"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("pytest-runner" ,python-pytest-runner)
+       ("pytest" ,python-pytest)
+       ("six" ,python-six)))
+    (home-page "https://github.com/WoLpH/python-utils")
+    (synopsis "Convenient utilities not included with the standard Python install")
+    (description
+      "Python Utils is a collection of small Python functions and classes which
+make common patterns shorter and easier.")
+    (license license:bsd-2)))
+
+(define-public python2-utils
+  (package-with-python2 python-utils))
+
+(define-public python-sphinx-me
+  (package
+    (name "python-sphinx-me")
+    (version "0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "sphinx-me" version))
+       (sha256
+        (base32
+         "06jzgp213zihnvpcy2y5jy3ykid3apc2ncp2pg6a2g05lhiziglq"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/stephenmcd/sphinx-me")
+    (synopsis "Create a Sphinx documentation shell")
+    (description
+      "Create a Sphinx documentation shell for your project and include the
+README file as the documentation index.  It handles extracting the required
+meta data such as the project name, author and version from your project for
+use in your Sphinx docs.")
+    (license license:bsd-2)))
+
+(define-public python2-sphinx-me
+  (package-with-python2 python-sphinx-me))
+
+(define-public python-diff-match-patch
+  (package
+    (name "python-diff-match-patch")
+    (version "20121119")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "diff-match-patch" version))
+        (sha256
+         (base32
+          "0k1f3v8nbidcmmrk65m7h8v41jqi37653za9fcs96y7jzc8mdflx"))))
+    (build-system python-build-system)
+    (home-page "https://code.google.com/p/google-diff-match-patch")
+    (synopsis "Synchronize plain text")
+    (description "Diff Match and Patch libraries offer robust algorithms to
+perform the operations required for synchronizing plain text.")
+    (license license:asl2.0)))
+
+(define-public python2-diff-match-patch
+  (package-with-python2 python-diff-match-patch))
+
+(define-public python-dirsync
+  (package
+    (name "python-dirsync")
+    (version "2.2.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "dirsync" version))
+        (sha256
+         (base32
+          "1r40fkanksagcszf1ag85mdr8w7rgc7196n6s1qlsk2abw6i7v0z"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("six" ,python-six)))
+    (home-page "https://bitbucket.org/tkhyn/dirsync")
+    (synopsis "Advanced directory tree synchronisation tool")
+    (description "Advanced directory tree synchronisation tool.")
+    (license license:expat)))
+
+(define-public python2-dirsync
+  (package-with-python2 python-dirsync))
+
+(define-public python-levenshtein
+  (package
+    (name "python-levenshtein")
+    (version "0.12.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "python-Levenshtein" version))
+      (sha256
+       (base32
+        "1c9ybqcja31nghfcc8xxbbz9h60s9qi12b9hr4jyl69xbvg12fh3"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/ztane/python-Levenshtein")
+    (synopsis "Fast computation of Levenshtein distance and string similarity")
+    (description
+     "The Levenshtein Python C extension module contains functions for fast computation of
+@enumerate
+@item Levenshtein (edit) distance, and edit operations
+@item string similarity
+@item approximate median strings, and generally string averaging
+@item string sequence and set similarity
+@end enumerate
+It supports both normal and Unicode strings.")
+    (license license:gpl2+)))
+
+(define-public python2-levenshtein
+  (package-with-python2 python-levenshtein))
+
+(define-public python-scandir
+  (package
+    (name "python-scandir")
+    (version "1.9.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "scandir" version))
+       (sha256
+        (base32 "0r3hvf1a9jm1rkqgx40gxkmccknkaiqjavs8lccgq9s8khh5x5s4"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases (modify-phases %standard-phases
+                  (replace 'check
+                    (lambda _
+                      (invoke "python" "test/run_tests.py"))))))
+    (home-page "https://github.com/benhoyt/scandir")
+    (synopsis "Directory iteration function")
+    (description
+     "Directory iteration function like os.listdir(), except that instead of
+returning a list of bare filenames, it yields DirEntry objects that include
+file type and stat information along with the name.  Using scandir() increases
+the speed of os.walk() by 2-20 times (depending on the platform and file
+system) by avoiding unnecessary calls to os.stat() in most cases.
+
+This package is part of the Python standard library since version 3.5.")
+    (license license:bsd-3)))
+
+(define-public python2-scandir
+  (package-with-python2 python-scandir))
+
+(define-public python2-stemming
+  (package
+    (name "python2-stemming")
+    (version "1.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "stemming" version))
+       (sha256
+        (base32 "0ldwa24gnnxhniv0fhygkpc2mwgd93q10ag8rvzayv6hw418frsr"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2))
+    (home-page "https://bitbucket.org/mchaput/stemming/overview")
+    (synopsis "Python implementations of various stemming algorithms")
+    (description
+     "Python implementations of the Porter, Porter2, Paice-Husk, and Lovins
+stemming algorithms for English.  These implementations are straightforward and
+efficient, unlike some Python versions of the same algorithms available on the
+Web.  This package is an extraction of the stemming code included in the Whoosh
+search engine.")
+    (license license:public-domain)))
+
+(define-public python-factory-boy
+  (package
+    (name "python-factory-boy")
+    (version "2.8.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "factory_boy" version))
+       (sha256
+        (base32 "1fvin6san5xsjh2c4y18caj2lnmwxlylyqm8mh1yc6rp38wlwr56"))))
+    (build-system python-build-system)
+    (arguments
+     ;; Tests are not included in the tarball.
+     `(#:tests? #f))
+    (propagated-inputs
+     `(("faker" ,python-faker)))
+    (home-page "https://github.com/benhoyt/scandir")
+    (synopsis "Versatile test fixtures replacement")
+    (description
+     "Factory_boy is a fixtures replacement based on thoughtbot’s factory_girl.
+
+As a fixtures replacement tool, it aims to replace static, hard to maintain
+fixtures with easy-to-use factories for complex object.
+
+Instead of building an exhaustive test setup with every possible combination
+of corner cases, factory_boy allows you to use objects customized for the
+current test, while only declaring the test-specific fields")
+    (license license:expat)))
+
+(define-public python2-factory-boy
+  (package-with-python2 python-factory-boy))
+
+(define-public python-translate-toolkit
+  (package
+    (name "python-translate-toolkit")
+    (version "2.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "translate-toolkit" version ".tar.bz2"))
+       (sha256
+        (base32 "1vlkwrg83vb17jc36pmwh2b7jphwf390lz0jw8hakcg16qhwypvq"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-sphinx" ,python-sphinx)))
+    (propagated-inputs
+     `(("python-babel" ,python-babel)
+       ("python-beautifulsoup4" ,python-beautifulsoup4)
+       ("python-chardet" ,python-chardet)
+       ("python-diff-match-patch" ,python-diff-match-patch)
+       ("python-levenshtein" ,python-levenshtein)
+       ("python-lxml" ,python-lxml)
+       ("python-six" ,python-six)
+       ("python-vobject" ,python-vobject)
+       ("python-pyyaml" ,python-pyyaml)))
+    (arguments
+     ;; TODO: tests are not run, because they end with
+     ;; TypeError: parse() missing 2 required positional arguments: 'tree' and
+     ;; 'parse_funcs'
+     ;; during test setup.
+     `(#:tests? #f))
+    (home-page "http://toolkit.translatehouse.org")
+    (synopsis "Tools and API for translation and localization engineering")
+    (description
+     "Tools and API for translation and localization engineering.  It contains
+several utilities, as well as an API for building localization tools.")
+    (license license:gpl2+)))
+
+(define-public python2-translate-toolkit
+  (package-with-python2 python-translate-toolkit))
+
+(define-public python-packaging
+  (package
+    (name "python-packaging")
+    (version "18.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "packaging" version))
+        (sha256
+         (base32
+          "01wq9c53ix5rz6qg2c98gy8n4ff768rmanifm8m5jpjiaizj51h8"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases (modify-phases %standard-phases
+                  (replace 'check
+                    (lambda _ (invoke "py.test" "-vv"))))))
+    (native-inputs
+     `(("python-pretend" ,python-pretend)
+       ("python-pytest" ,python-pytest)))
+    (propagated-inputs
+     `(("python-pyparsing" ,python-pyparsing)
+       ("python-six" ,python-six)))
+    (home-page "https://github.com/pypa/packaging")
+    (synopsis "Core utilities for Python packages")
+    (description "Packaging is a Python module for dealing with Python packages.
+It offers an interface for working with package versions, names, and dependency
+information.")
+    ;; From 'LICENSE': This software is made available under the terms of
+    ;; *either* of the licenses found in LICENSE.APACHE or LICENSE.BSD.
+    ;; Contributions to this software is made under the terms of *both* these
+    ;; licenses.
+    (license (list license:asl2.0 license:bsd-2))))
+
+(define-public python2-packaging
+  (package-with-python2 python-packaging))
+
+(define-public python-relatorio
+  (package
+    (name "python-relatorio")
+    (version "0.8.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "relatorio" version))
+       (sha256
+        (base32
+         "1na6hlhz1awi1hbjg1gyclq0khz42iz90wvdjw7mmj655788bpxx"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-lxml" ,python-lxml)
+       ("python-genshi" ,python-genshi)))
+    (native-inputs
+     `(("python-magic" ,python-magic)))
+    (home-page "https://relatorio.tryton.org/")
+    (synopsis "Templating library able to output ODT and PDF files")
+    (description "Relatorio is a templating library which provides a way to
+easily output ODT, ODS, PNG, SVG and several other kinds of files.  Support
+for more filetypes can be easily added by creating plugins for them.")
+    (license license:gpl3+)))
+
+(define-public python2-relatorio
+  (package-with-python2 python-relatorio))
+
+(define-public python-radon
+  (package
+    (name "python-radon")
+    (version "2.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "radon" version))
+       (sha256
+        (base32
+         "07gq5hq4nrffxnlnksws9hrx7fd001gam63j62i82gyfr23gvdym"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases (modify-phases %standard-phases
+                  (replace 'check
+                    (lambda _
+                      (invoke "python" "radon/tests/run.py"))))))
+    (propagated-inputs
+     `(("python-colorama" ,python-colorama)
+       ("python-flake8-polyfill" ,python-flake8-polyfill)
+       ("python-mando" ,python-mando)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-pytest-mock" ,python-pytest-mock)))
+    (home-page "https://radon.readthedocs.org/")
+    (synopsis "Code Metrics in Python")
+    (description "Radon is a Python tool which computes various code metrics.
+Supported metrics are:
+@itemize @bullet
+@item raw metrics: SLOC, comment lines, blank lines, &c.
+@item Cyclomatic Complexity (i.e.  McCabe’s Complexity)
+@item Halstead metrics (all of them)
+@item the Maintainability Index (a Visual Studio metric)
+@end itemize")
+    (license license:expat)))
+
+(define-public python2-radon
+  (package-with-python2 python-radon))
+
+(define-public python-sure
+  (package
+    (name "python-sure")
+    (version "1.4.11")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "sure" version))
+       (sha256
+        (base32
+         "1and0drq8w9iplsic22n2h7hkpyq03a1mbqk4sgcdqhqzdqm539w"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-mock" ,python-mock)
+       ("python-six" ,python-six)))
+    (native-inputs
+     `(("python-nose" ,python-nose)))
+    (home-page "https://github.com/gabrielfalcao/sure")
+    (synopsis "Automated testing library in python for python")
+    (description
+     "Sure is a python library that leverages a DSL for writing assertions.
+Sure is heavily inspired by @code{RSpec Expectations} and @code{should.js}.")
+    (license license:gpl3+)))
+
+(define-public python2-sure
+  (package-with-python2 python-sure))
+
+(define-public python2-couleur
+  ;; This package does not seem to support python3 at all, hence,
+  ;; only the python2 variant definition is provided.
+  (package
+    (name "python2-couleur")
+    (version "0.6.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "couleur" version))
+       (sha256
+        (base32
+         "1qqaxyqz74wvid0cr119dhcwz0h0if5b5by44zl49pd5z65v58k1"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2))
+    (home-page "https://github.com/gabrielfalcao/couleur")
+    (synopsis
+     "ANSI terminal tool for python, colored shell and other handy fancy features")
+    (description
+     "@code{Couleur} provides python programs a way to use the ANSI features in a unix
+terminal such as coloured output in the shell, overwriting output, indentation, etc.")
+    ;; README.md says ASL2.0, but all source code headers are LGPL3+.
+    ;; https://github.com/gabrielfalcao/couleur/issues/11
+    (license license:lgpl3+)))
+
+(define-public python-misaka
+  (package
+    (name "python-misaka")
+    (version "2.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "misaka" version))
+       (sha256
+        (base32
+         "1yqrq3a5rracirmvk52n28nn6ckdaz897gnigv89a9gmyn87sqw7"))))
+    (build-system python-build-system)
+    (arguments
+     `(;; Line 37 of setup.py calls self.run_command('develop')
+       ;; in the 'check' phase. This command seems to be trying
+       ;; to write to
+       ;; /gnu/store/...-python-<version>/lib/python<version>/site-packages/
+       ;; for which it does not have the permission to write.
+       #:tests? #f))
+    (propagated-inputs
+     `(("python-cffi" ,python-cffi)))
+    (home-page "https://github.com/FSX/misaka")
+    (synopsis "Python binding for Hoedown")
+    (description
+     "@code{Misaka} is a CFFI-based binding for @code{Hoedown}, a fast markdown processing
+library written in C.  It features a fast HTML renderer and functionality to make custom
+renderers (e.g. man pages or LaTeX).")
+    (license license:expat)))
+
+(define-public python2-misaka
+  (package-with-python2 python-misaka))
+
+(define-public python2-steadymark
+  ;; This is forced into being a python2 only variant
+  ;; due to its dependence on couleur that has no support
+  ;; for python3
+  (package
+    (name "python2-steadymark")
+    (version "0.7.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "steadymark" version))
+       (sha256
+        (base32
+         "1640i9g8dycql3cc8j0bky0jkzj0q39blfbp4lsgpkprkfgcdk8v"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-couleur" ,python2-couleur)
+       ("python-sure" ,python2-sure)
+       ("python-misaka" ,python2-misaka)))
+    (arguments
+     `(#:python ,python-2
+       #:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'patch-setup-py
+           (lambda _
+             ;; Update requirements from dependency==version
+             ;; to dependency>=version
+             (substitute* "setup.py"
+               (("==") ">="))
+             #t)))))
+    (home-page "https://github.com/gabrielfalcao/steadymark")
+    (synopsis "Markdown-based test runner for python")
+    (description
+     "@code{Steadymark} allows documentation to be written in github-flavoured
+markdown.  The documentation may contain snippets of code surrounded by python
+code blocks and @code{Steadymark} will find these snippets and run them, making
+sure that there are no old malfunctional examples in the documentation examples.")
+    (license license:expat)))
+
+(define-public python-jsonpointer
+  (package
+    (name "python-jsonpointer")
+    (version "1.10")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "jsonpointer" version))
+       (sha256
+        (base32
+         "1cg0gvgqjysydv6p45v4jywg1jb3v48c7m3cbpi57zgf6nndr9cz"))))
+  (build-system python-build-system)
+  (home-page "https://github.com/stefankoegl/python-json-pointer")
+  (synopsis "Identify specific nodes in a JSON document")
+  (description "@code{jsonpointer} allows you to access specific nodes
+by path in a JSON document (see RFC 6901).")
+  (license license:bsd-3)))
+
+(define-public python2-jsonpointer
+  (package-with-python2 python-jsonpointer))
+
+(define-public python-jsonpatch
+  (package
+    (name "python-jsonpatch")
+    (version "1.16")
+    (source
+     (origin
+       (method url-fetch)
+       ;; pypi version lacks tests.js
+       (uri (string-append "https://github.com/stefankoegl/python-json-patch/"
+                           "archive/v" version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "085ykisl8v7mv9h7hvhdy3l2fjzs4214gx32r5k6nx4f76hbv6y5"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-jsonpointer" ,python-jsonpointer)))
+    (home-page "https://github.com/stefankoegl/python-json-patch")
+    (synopsis "Applying JSON Patches in Python 2.6+ and 3.x")
+    (description "@code{jsonpatch} is a library and program that allows
+applying JSON Patches according to RFC 6902.")
+    (license license:bsd-3)))
+
+(define-public python2-jsonpatch
+  (package-with-python2 python-jsonpatch))
+
+(define-public python-jsonpatch-0.4
+  (package (inherit python-jsonpatch)
+    (name "python-jsonpatch")
+    (version "0.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/stefankoegl/python-json-patch/"
+                           "archive/v" version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0j0cd9z9zyp8kppp464jxrfgrnbgkzl1yi10i5gsv8yz6d95929d"))))))
+
+(define-public python2-jsonpatch-0.4
+  (package-with-python2 python-jsonpatch-0.4))
+
+(define-public python-rfc3986
+  (package
+    (name "python-rfc3986")
+    (version "1.1.0")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "rfc3986" version))
+              (sha256
+               (base32
+                "06wlmysw83f75ff84zr1yr6n0shvc2xn1n1sb4iwzqap9hf5fn44"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:modules ((guix build utils)
+                  (guix build python-build-system)
+                  (ice-9 ftw)
+                  (srfi srfi-1)
+                  (srfi srfi-26))
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (let ((cwd (getcwd)))
+               (setenv "PYTHONPATH"
+                       (string-append cwd "/build/"
+                                      (find (cut string-prefix? "lib" <>)
+                                            (scandir (string-append cwd "/build")))
+                                      ":"
+                                      (getenv "PYTHONPATH")))
+             (invoke "pytest" "-v")))))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "https://rfc3986.readthedocs.io/")
+    (synopsis "Parse and validate URI references")
+    (description
+     "@code{rfc3986} is a Python implementation of RFC@tie{}3986 including
+validation and authority parsing.  This module also supports RFC@tie{}6874
+which adds support for zone identifiers to IPv6 addresses.")
+    (license license:asl2.0)))
+
+(define-public python2-rfc3986
+  (package-with-python2 python-rfc3986))
+
+(define-public python-rfc3987
+  (package
+    (name "python-rfc3987")
+    (version "1.3.7")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "rfc3987" version))
+      (sha256
+       (base32
+        "192pclzs2y0yaywqkrlvd0x73740q310kvqvm6jldhi619mq59wi"))))
+    (build-system python-build-system)
+    (home-page "https://pypi.python.org/pypi/rfc3987")
+    (synopsis "Parsing and validation of URIs (RFC 3986) and IRIs (RFC 3987)")
+    (description "@code{rfc3987} provides routines for parsing and
+validation of URIs (see RFC 3986) and IRIs (see RFC 3987).")
+    (license license:gpl3+)))
+
+(define-public python2-rfc3987
+  (package-with-python2 python-rfc3987))
+
+(define-public python-validate-email
+  (package
+    (name "python-validate-email")
+    (version "1.3")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "validate_email" version))
+      (sha256
+       (base32
+        "1bxffaf5yz2cph8ki55vdvdypbwkvn2xr1firlcy62vqbzf1jivq"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/syrusakbary/validate_email")
+    (synopsis "Verifies if an email address is valid and really exists")
+    (description "@code{validate_email} can be used to verify if an email
+address is valid and really exists.")
+    (license license:lgpl3+)))
+
+(define-public python2-validate-email
+  (package-with-python2 python-validate-email))
+
+(define-public python-flex
+  (package
+    (name "python-flex")
+    (version "6.10.0")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "flex" version))
+      (sha256
+       (base32
+        "00pamnwla3khk8nyla7y28dq9jnh69swd7f4jfsl7sn1izs8n8zk"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-click" ,python-click)
+       ("python-iso8601" ,python-iso8601)
+       ("python-jsonpointer" ,python-jsonpointer)
+       ("python-pyyaml" ,python-pyyaml)
+       ("python-requests" ,python-requests)
+       ("python-rfc3987" ,python-rfc3987)
+       ("python-six" ,python-six)
+       ("python-validate-email" ,python-validate-email)))
+    (home-page "https://github.com/pipermerriam/flex")
+    (synopsis "Validates Swagger schemata")
+    (description "@code{flex} can be used to validate Swagger schemata.")
+    (license license:bsd-3)))
+
+(define-public python2-flex
+  (package-with-python2 python-flex))
+
+(define-public python-marshmallow
+  (package
+    (name "python-marshmallow")
+    (version "3.0.0b14")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "marshmallow" version))
+      (sha256
+       (base32
+        "1digk3f5cfk7wmlka65mc7bzsd96pbsgcsvp6pimd5b4ff9zb5p3"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-dateutil" ,python-dateutil)
+       ("python-simplejson" ,python-simplejson)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-pytz" ,python-pytz)))
+    (home-page "https://github.com/marshmallow-code/marshmallow")
+    (synopsis "Convert complex datatypes to and from native
+Python datatypes.")
+    (description "@code{marshmallow} provides a library for converting
+complex datatypes to and from native Python datatypes.")
+    (license license:expat)))
+
+(define-public python2-marshmallow
+  (package-with-python2 python-marshmallow))
+
+(define-public python-apispec
+  (package
+    (name "python-apispec")
+    (version "0.25.3")
+    (source
+     (origin
+      (method url-fetch)
+      (uri (pypi-uri "apispec" version))
+      (sha256
+        (base32
+          "0kxa8723zbisx10363yh4mmmn4higxrspymbjfz5zq8f644zagm9"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-pyyaml" ,python-pyyaml)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-flask" ,python-flask)
+       ("python-marshmallow" ,python-marshmallow)
+       ("python-tornado" ,python-tornado)
+       ("python-bottle" ,python-bottle)
+       ("python-mock" ,python-mock)))
+    (home-page "https://github.com/marshmallow-code/apispec")
+    (synopsis "Swagger 2.0 API specification generator")
+    (description "@code{python-apispec} is a pluggable API specification
+generator. Currently supports the OpenAPI specification (f.k.a.
+Swagger 2.0).")
+    (license license:expat)))
+
+(define-public python2-apispec
+  (package-with-python2 python-apispec))
+
+(define-public python-flasgger
+  (package
+    (name "python-flasgger")
+    (version "0.6.3")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (string-append "https://github.com/rochacbruno/flasgger/archive/"
+                            version ".tar.gz"))
+        (file-name (string-append name "-" version ".tar.gz"))
+        (sha256
+          (base32
+            "1gqzlm0rb55fdpsy5ipkganlx9cnpi454fqyycr03jm22zql14ay"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda* (#:key inputs outputs #:allow-other-keys)
+             (substitute* "Makefile"
+               (("flake8 flasgger --ignore=F403")
+                "flake8 flasgger --ignore=E731,F403"))
+             (setenv "PYTHONPATH" (string-append (getcwd)
+                                                 ":"
+                                                 (getenv "PYTHONPATH")))
+             (zero? (system* "py.test")))))))
+    (propagated-inputs
+     `(("python-flask" ,python-flask)
+       ("python-pyyaml" ,python-pyyaml)
+       ("python-jsonschema" ,python-jsonschema)
+       ("python-mistune" ,python-mistune)
+       ("python-six" ,python-six)))
+    (native-inputs
+     `(("python-decorator" ,python-decorator)
+       ("python-flake8" ,python-flake8)
+       ("python-flask-restful" ,python-flask-restful)
+       ("python-flex" ,python-flex)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-cov" ,python-pytest-cov)
+       ("python-marshmallow" ,python-marshmallow)
+       ("python-apispec" ,python-apispec)))
+    (home-page "https://github.com/rochacbruno/flasgger/")
+    (synopsis "Extract Swagger specs from your Flask project")
+    (description "@code{python-flasgger} allows extracting Swagger specs
+from your Flask project.  It is a fork of Flask-Swagger.")
+    (license license:expat)))
+
+(define-public python2-flasgger
+  (package-with-python2 python-flasgger))
+
+(define-public python-swagger-spec-validator
+  (package
+    (name "python-swagger-spec-validator")
+    (version "2.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "swagger-spec-validator" version))
+       (sha256
+        (base32
+         "13hkpn2lycwr0468yqhjb3kwszqf7hjwlq61w7vdxq1caz31k4nw"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-jsonschema" ,python-jsonschema)
+       ("python-six" ,python-six)))
+    (home-page
+     "https://github.com/Yelp/swagger_spec_validator")
+    (synopsis "Validation of Swagger specifications")
+    (description "@code{swagger_spec_validator} provides a library for
+validating Swagger API specifications.")
+    (license license:asl2.0)))
+
+(define-public python2-swagger-spec-validator
+  (package-with-python2 python-swagger-spec-validator))
+
+(define-public python-apache-libcloud
+  (package
+    (name "python-apache-libcloud")
+    (version "2.4.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "apache-libcloud" version))
+        (sha256
+         (base32
+          "0daj3mkzw79v5zin2r1s2wkrz1hplfc16bwj4ss68i5qjq4l2p0j"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-ssh
+           (lambda* (#:key inputs #:allow-other-keys)
+             (substitute* "libcloud/compute/ssh.py"
+               (("'ssh'") (string-append "'" (assoc-ref inputs "openssh")
+                                         "/bin/ssh" "'")))
+             #t))
+         (add-after 'unpack 'patch-tests
+           (lambda _
+             (substitute* "./libcloud/test/test_file_fixtures.py"
+               ;; See <https://issues.apache.org/jira/browse/LIBCLOUD-923>.
+               (("def _ascii") "def _raw_data(self, method, url, body, headers):
+        return (httplib.OK,
+                \"1234abcd\",
+                {\"test\": \"value\"},
+                httplib.responses[httplib.OK])
+    def _ascii"))
+             (substitute* "libcloud/test/compute/test_ssh_client.py"
+               (("class ShellOutSSHClientTests")
+                "@unittest.skip(\"Guix container doesn't have ssh service\")
+class ShellOutSSHClientTests")
+               ;; See <https://issues.apache.org/jira/browse/LIBCLOUD-924>.
+               (("'.xf0.x90.x8d.x88'") "b'\\xF0\\x90\\x8D\\x88'")
+               (("'.xF0', '.x90', '.x8D', '.x88'")
+                "b'\\xF0', b'\\x90', b'\\x8D', b'\\x88'"))
+             #t))
+         (add-before 'check 'copy-secret
+           (lambda _
+             (copy-file "libcloud/test/secrets.py-dist"
+                        "libcloud/test/secrets.py")
+             #t)))))
+    (inputs
+     `(("openssh" ,openssh)))
+    (propagated-inputs
+     `(("python-paramiko" ,python-paramiko)
+       ("python-requests" ,python-requests)))
+    (native-inputs
+     `(("python-lockfile" ,python-lockfile)
+       ("python-mock" ,python-mock)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)
+       ("python-requests-mock" ,python-requests-mock)))
+    (home-page "https://libcloud.apache.org/")
+    (synopsis "Unified Cloud API")
+    (description "@code{libcloud} is a Python library for interacting with
+many of the popular cloud service providers using a unified API.")
+    (license license:asl2.0)))
+
+(define-public python2-apache-libcloud
+  (package-with-python2 python-apache-libcloud))
+
+(define-public python-smmap2
+  (package
+    (name "python-smmap2")
+    (version "2.0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "smmap2" version))
+       (sha256
+        (base32
+         "1hvn28p3zvxa98sbi9lrqvv2ps4q284j4jq9a619zw0m7yv0sly7"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-nosexcover" ,python-nosexcover)))
+    (home-page "https://github.com/Byron/smmap")
+    (synopsis "Python sliding window memory map manager")
+    (description "@code{smmap2} is a pure Python implementation of a sliding
+window memory map manager.")
+    (license license:bsd-3)))
+
+(define-public python2-smmap2
+  (package-with-python2 python-smmap2))
+
+(define-public python-regex
+  (package
+    (name "python-regex")
+    (version "2017.06.07")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "regex" version))
+              (sha256
+               (base32
+                "06r6b7yigikbj3a72whl85r2b64pj1r0ypmw9yalmkm0wnxq8mz4"))))
+    (build-system python-build-system)
+    (home-page "https://bitbucket.org/mrabarnett/mrab-regex")
+    (synopsis "Alternative regular expression module")
+    (description "This regular expression implementation is backwards-
+compatible with the standard @code{re} module, but offers additional
+functionality like full case-folding for case-insensitive matches in Unicode.")
+    (license license:psfl)))
+
+(define-public python2-regex
+  (package-with-python2 python-regex))
+
+(define-public python2-pyopengl
+  (package
+   (name "python2-pyopengl")
+   (version "3.1.0")
+   (source
+    (origin
+     (method url-fetch)
+     (uri (pypi-uri "PyOpenGL" version))
+     (sha256
+      (base32
+       "1byxjj6a8rwzhxhjqlc588zdad2qwxdd7vlam2653ylll31waiwv"))))
+   (arguments
+     `(#:python ,python-2))
+   (build-system python-build-system)
+   (home-page "http://pyopengl.sourceforge.net")
+   (synopsis "Standard OpenGL bindings for Python")
+   (description
+    "PyOpenGL is the most common cross platform Python binding to OpenGL and
+related APIs.  The binding is created using the standard @code{ctypes}
+library.")
+   (license license:bsd-3)))
+
+(define-public python2-pyopengl-accelerate
+  (package
+    (inherit python2-pyopengl)
+    (name "python2-pyopengl-accelerate")
+    (version "3.1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "PyOpenGL-accelerate" version))
+       (sha256
+        (base32
+         "0464c1ifzk0k92lyndikmvzjgnx1y25r7bkkc8pnxm4kp1q4czwj"))))
+    (synopsis "Acceleration code for PyOpenGL")
+    (description
+     "This is the Cython-coded accelerator module for PyOpenGL.")))
+
+(define-public python-rencode
+  (package
+   (name "python-rencode")
+   (version "1.0.5")
+   (source
+    (origin
+     (method url-fetch)
+     (uri (pypi-uri "rencode" version))
+     (sha256
+      (base32
+       "0mzwdq1is7kyyr32i5k4iz6g5xxdvmiyc132jnc60p9m6lnwjrpv"))))
+   (build-system python-build-system)
+   (arguments
+    `(#:phases
+      (modify-phases %standard-phases
+        (add-before 'check 'delete-bogus-test
+          ;; This test requires /home/aresch/Downloads, which is not provided by
+          ;; the build environment.
+          (lambda _
+            (delete-file "rencode/t.py")
+            #t)))))
+   (native-inputs `(("pkg-config" ,pkg-config)
+                    ("python-cython" ,python-cython)))
+   (home-page "https://github.com/aresch/rencode")
+   (synopsis "Serialization of heterogeneous data structures")
+   (description
+    "The @code{rencode} module is a data structure serialization library,
+similar to @code{bencode} from the BitTorrent project.  For complex,
+heterogeneous data structures with many small elements, r-encoding stake up
+significantly less space than b-encodings.  This version of rencode is a
+complete rewrite in Cython to attempt to increase the performance over the
+pure Python module.")
+   (license license:bsd-3)))
+
+(define-public python2-rencode
+  (package-with-python2 python-rencode))
+
+(define-public python-xenon
+  (package
+    (name "python-xenon")
+    (version "0.5.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "xenon" version))
+       (sha256
+        (base32
+         "029cbhysg2vr5n4jz8gpg2793f8wkwnqpr1qgv6c1dn685vy31mc"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pyyaml" ,python-pyyaml)
+       ("python-radon" ,python-radon)
+       ("python-requests" ,python-requests)
+       ("python-flake8" ,python-flake8)
+       ("python-tox" ,python-tox)))
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'patch-test-requirements
+           (lambda _
+             ;; Remove httpretty dependency for tests.
+             (substitute* "setup.py"
+               (("httpretty") ""))
+             #t)))))
+    (home-page "https://xenon.readthedocs.org/")
+    (synopsis "Monitor code metrics for Python on your CI server")
+    (description
+     "Xenon is a monitoring tool based on Radon.  It monitors code complexity.
+Ideally, @code{xenon} is run every time code is committed.  Through command
+line options, various thresholds can be set for the complexity of code.  It
+will fail (i.e.  it will exit with a non-zero exit code) when any of these
+requirements is not met.")
+    (license license:expat)))
+
+(define-public python2-xenon
+  (package-with-python2 python-xenon))
+
+(define-public python-pysocks
+  (package
+    (name "python-pysocks")
+    (version "1.6.8")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "PySocks" version))
+       (sha256
+        (base32
+         "0wn6xafwy9c1gamwljw3fyvih5w19qy9xp39zmv8c90ai5ajrr9z"))))
+    (build-system python-build-system)
+    (arguments `(#:tests? #f))
+    (home-page "https://github.com/Anorov/PySocks")
+    (synopsis "SOCKS client module")
+    (description "@code{pysocks} is an updated and semi-actively maintained
+version of @code{SocksiPy} with bug fixes and extra features.")
+    (license license:bsd-3)))
+
+(define-public python2-pysocks
+  (package-with-python2 python-pysocks))
+
+(define-public python-pydiff
+  (package
+    (name "python-pydiff")
+    (version "0.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pydiff" version))
+        (sha256
+          (base32
+            "1als83h9w0gab24ipyna6khm390qmpnpkc5jksmdbs2xc8hp2z44"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/myint/pydiff")
+    (synopsis "Library to diff two Python files at the bytecode level")
+    (description
+      "@code{pydiff} makes it easy to look for actual code changes while
+ignoring formatting changes.")
+    (license license:expat)))
+
+(define-public python2-pydiff
+  (package-with-python2 python-pydiff))
+
+(define-public python-tqdm
+  (package
+    (name "python-tqdm")
+    (version "4.19.6")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "tqdm" version))
+         (sha256
+           (base32
+             "1pw0ngm0zn9papdmkwipi3yih5c3di6d0w849bdmrraq4d2d9h2y"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-flake8" ,python-flake8)
+       ("python-nose" ,python-nose)
+       ("python-coverage" ,python-coverage)))
+    (home-page "https://github.com/tqdm/tqdm")
+    (synopsis "Fast, extensible progress meter")
+    (description
+      "Make loops show a progress bar on the console by just wrapping any
+iterable with @code{|tqdm(iterable)|}.  Offers many options to define
+design and layout.")
+    (license (list license:mpl2.0 license:expat))))
+
+(define-public python2-tqdm
+  (package-with-python2 python-tqdm))
+
+(define-public python-pkginfo
+  (package
+    (name "python-pkginfo")
+    (version "1.4.2")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "pkginfo" version))
+        (sha256
+          (base32
+            "0x6lm17p1ks031mj6pajyp4rkq74vpqq8qwjb7ikgwmkli1day2q"))))
+    (build-system python-build-system)
+    (arguments
+     ;; The tests are broken upstream.
+     '(#:tests? #f))
+    (home-page
+      "https://code.launchpad.net/~tseaver/pkginfo/trunk")
+    (synopsis
+      "Query metadatdata from sdists, bdists, and installed packages")
+    (description
+      "API to query the distutils metadata written in @file{PKG-INFO} inside a
+source distriubtion (an sdist) or a binary distribution (e.g., created by
+running bdist_egg).  It can also query the EGG-INFO directory of an installed
+distribution, and the *.egg-info stored in a \"development checkout\" (e.g,
+created by running @code{python setup.py develop}).")
+    (license license:expat)))
+
+(define-public python2-pkginfo
+  (package-with-python2 python-pkginfo))
+
+(define-public python-twine
+  (package
+    (name "python-twine")
+    (version "1.9.1")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "twine" version))
+        (sha256
+          (base32
+            "1ay1b6kdq6k4bfbjsvf6ymj41wrgpvinhxndb09355pwhxwmp96a"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-tqdm" ,python-tqdm)
+       ("python-pkginfo" ,python-pkginfo)
+       ("python-requests" ,python-requests)
+       ("python-requests-toolbelt" ,python-requests-toolbelt)))
+    (home-page "https://github.com/pypa/twine")
+    (synopsis "Collection of utilities for interacting with PyPI")
+    (description
+      "@code{twine} currently supports registering projects and uploading
+distributions.  It authenticates the user over HTTPS, allows them to pre-sign
+their files and supports any packaging format (including wheels).")
+    (license license:asl2.0)))
+
+(define-public python2-twine
+  (package-with-python2 python-twine))
+
+(define-public python-linecache2
+  (package
+    (name "python-linecache2")
+    (version "1.0.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "linecache2" version))
+        (sha256
+          (base32
+            "0z79g3ds5wk2lvnqw0y2jpakjf32h95bd9zmnvp7dnqhf57gy9jb"))))
+    (build-system python-build-system)
+    (arguments
+     `(;; The tests depend on unittest2, and our version is a bit too old.
+       #:tests? #f))
+    (native-inputs
+     `(("python-pbr" ,python-pbr-minimal)))
+    (home-page
+      "https://github.com/testing-cabal/linecache2")
+    (synopsis "Backports of the linecache module")
+    (description
+      "The linecache module allows one to get any line from any file, while
+attempting to optimize internally, using a cache, the common case where many
+lines are read from a single file.")
+    (license license:psfl)))
+
+(define-public python2-linecache2
+  (package-with-python2 python-linecache2))
+
+(define-public python-traceback2
+  (package
+    (name "python-traceback2")
+    (version "1.4.0")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "traceback2" version))
+        (sha256
+          (base32
+            "0c1h3jas1jp1fdbn9z2mrgn3jj0hw1x3yhnkxp7jw34q15xcdb05"))))
+    (build-system python-build-system)
+    (arguments
+     `(;; python-traceback2 and python-unittest2 depend on one another.
+       #:tests? #f))
+    (native-inputs
+     `(("python-pbr" ,python-pbr-minimal)))
+    (propagated-inputs
+      `(("python-linecache2" ,python-linecache2)))
+    (home-page
+      "https://github.com/testing-cabal/traceback2")
+    (synopsis "Backports of the traceback module")
+    (description
+      "This module provides a standard interface to extract, format and print
+stack traces of Python programs.  It exactly mimics the behavior of the Python
+interpreter when it prints a stack trace.")
+    (license license:psfl)))
+
+(define-public python2-traceback2
+  (package-with-python2 python-traceback2))
+
+(define-public python-ratelimiter
+  (package
+    (name "python-ratelimiter")
+    (version "1.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ratelimiter" version))
+       (sha256
+        (base32
+         "1dhz85mj5bqd2mij84ncs6pz32hgidr79hay4aqfmzaa4rbb497p"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:tests? #f))          ; There are no tests in the pypi archive.
+    (home-page "https://github.com/RazerM/ratelimiter")
+    (synopsis "Simple rate limiting object")
+    (description
+     "The @code{ratelimiter} module ensures that an operation will not be
+executed more than a given number of times during a given period.")
+    (license license:asl2.0)))
+
+(define-public python2-ratelimiter
+  (package-with-python2 python-ratelimiter))
+
+(define-public python-dukpy
+  (package
+    (name "python-dukpy")
+    (version "0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/kovidgoyal/dukpy/archive/v"
+                           version ".tar.gz"))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0pj39rfwlzivqm5hkrsza7gssg6ggpxlq5ivc8f3h7x5pfgc6y6c"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/kovidgoyal/dukpy")
+    (synopsis "Run JavaScript in python")
+    (description
+     "dukpy is a JavaScript runtime environment for Python using the duktape
+embeddable JavaScript engine.")
+    ;; Dukpy is licensed under MIT like the embedded duktape library,
+    ;; with 'errors.c' as GPL3.
+    (license (list license:expat license:gpl3))))
+
+(define-public python2-dukpy
+  (package-with-python2 python-dukpy))
+
+(define-public python-jsonrpclib-pelix
+  (package
+    (name "python-jsonrpclib-pelix")
+    (version "0.3.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "jsonrpclib-pelix" version))
+       (sha256
+        (base32
+         "0f83z5zi7w32vprhk1dyc94ir1bh4hdd57bjdbwkq9ykng8qilhl"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))                    ; no tests in PyPI tarball
+    (home-page "https://github.com/tcalmant/jsonrpclib/")
+    (synopsis "JSON-RPC 2.0 client library for Python")
+    (description
+     "This library implements the JSON-RPC v2.0
+specification (backwards-compatible) as a client library for Python.  This
+version is a fork of jsonrpclib by Josh Marshall, usable with Pelix remote
+services.")
+    (license license:asl2.0)))
+
+(define-public python2-jsonrpclib-pelix
+  (package-with-python2 python-jsonrpclib-pelix))
+
+(define-public python-setuptools-scm-git-archive
+  (package
+    (name "python-setuptools-scm-git-archive")
+    (version "1.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "setuptools_scm_git_archive" version))
+       (sha256
+        (base32
+         "1nii1sz5jq75ilf18bjnr11l9rz1lvdmyk66bxl7q90qan85yhjj"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (propagated-inputs
+     `(("python-setuptools-scm" ,python-setuptools-scm)))
+    (home-page "https://github.com/Changaco/setuptools_scm_git_archive/")
+    (synopsis "Setuptools_scm plugin for git archives")
+    (description
+     "The setuptools_scm_git_archive package is a plugin to
+setuptools_scm, which supports obtaining versions from git archives that
+belong to tagged versions.")
+    (license license:expat)))
+
+(define-public python2-setuptools-scm-git-archive
+  (package-with-python2 python-setuptools-scm-git-archive))
+
+(define-public python-pyclipper
+  (package
+    (name "python-pyclipper")
+    (version "1.1.0.post1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pyclipper" version ".zip"))
+       (sha256
+        (base32
+         "0ldbkbnx94an4zzrwb1sxmg6k0jgk4cwmvcdyy8y5k1zslc612wa"))
+      (modules '((guix build utils)))
+      (snippet
+       '(begin
+          ;; This file is generated by Cython.
+          (delete-file "pyclipper/pyclipper.cpp") #t))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'cythonize-sources
+           (lambda _
+             (with-directory-excursion "pyclipper"
+               (invoke "cython" "--cplus" "pyclipper.pyx")))))))
+    (propagated-inputs
+     `(("python-setuptools-scm-git-archive" ,python-setuptools-scm-git-archive)))
+    (native-inputs
+     `(("python-cython" ,python-cython)
+       ("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)
+       ("python-unittest2" ,python-unittest2)
+       ("unzip" ,unzip)))
+    (home-page "https://github.com/greginvm/pyclipper")
+    (synopsis "Wrapper for Angus Johnson's Clipper library")
+    (description
+     "Pyclipper is a Cython wrapper for the C++ translation of the
+Angus Johnson's polygon clipping Clipper library (ver. 6.4.2).")
+    (license license:expat)))
+
+(define-public python2-pyclipper
+  (package-with-python2 python-pyclipper))
+
+(define-public python2-booleanoperations
+  (package
+    (name "python2-booleanoperations")
+    (version "0.7.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "booleanOperations" version ".zip"))
+       (sha256
+        (base32
+         "1hw42fazdpvsn77glx96hwsj9l17mvx37sc5707s08y5w6fx16mn"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2))
+    (native-inputs
+     `(("unzip" ,unzip)
+       ("python2-pytest" ,python2-pytest)
+       ("python2-pytest-runner" ,python2-pytest-runner)))
+    (propagated-inputs
+     `(("python-fonttools" ,python2-fonttools)
+       ("python-pyclipper" ,python2-pyclipper)
+       ("python-ufolib" ,python2-ufolib)))
+    (home-page "https://github.com/typemytype/booleanOperations")
+    (synopsis "Boolean operations on paths")
+    (description
+     "BooleanOperations provides a Python library that enables
+boolean operations on paths.")
+    (license license:expat)))
+
+(define-public python-tempdir
+  (package
+    (name "python-tempdir")
+    (version "0.7.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "tempdir" version))
+       (sha256
+        (base32
+         "13msyyxqbicr111a294x7fsqbkl6a31fyrqflx3q7k547gnq15k8"))))
+    (build-system python-build-system)
+    (home-page "https://pypi.org/project/tempdir/")
+    (arguments
+     ;; the package has no tests
+     '(#:tests? #f))
+    (synopsis "Python library for managing temporary directories")
+    (description
+     "This library manages temporary directories that are automatically
+deleted with all their contents when they are no longer needed.  It is
+particularly convenient for use in tests.")
+    (license license:expat)))
+
+(define-public python2-tempdir
+  (package-with-python2 python-tempdir))
+
+(define-public python-activepapers
+  (package
+    (name "python-activepapers")
+    (version "0.2.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ActivePapers.Py" version))
+       (sha256
+        (base32
+         "12wkhjh90ffipjzv10swndp2xv9hd7xrxvg6v0n4n3i411pj4xb8"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:modules ((ice-9 ftw)
+                  (srfi srfi-1)
+                  (guix build utils)
+                  (guix build python-build-system))
+
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'delete-python2-code
+           (lambda _
+             (for-each delete-file
+                       '("lib/activepapers/builtins2.py"
+                         "lib/activepapers/standardlib2.py"
+                         "lib/activepapers/utility2.py"))))
+         (replace 'check
+           (lambda _
+             ;; Deactivate the test cases that download files
+             (setenv "NO_NETWORK_ACCESS" "1")
+             ;; For some strange reason, some tests fail if nosetests runs all
+             ;; test modules in a single execution. They pass if each test
+             ;; module is run individually.
+             (for-each (lambda (filename)
+                         (invoke "nosetests"
+                                 (string-append "tests/" filename)))
+                       (scandir "tests"
+                                (lambda (filename)
+                                  (string-suffix? ".py" filename)))))))))
+    (native-inputs
+     `(("python-tempdir" ,python-tempdir)
+       ("python-nose" ,python-nose)))
+    (propagated-inputs
+     `(("python-h5py" ,python-h5py)))
+    (home-page "http://www.activepapers.org/")
+    (synopsis "Executable papers for scientific computing")
+    (description
+     "ActivePapers is a tool for working with executable papers, which
+combine data, code, and documentation in single-file packages,
+suitable for publication as supplementary material or on repositories
+such as figshare or Zenodo.")
+    (properties `((python2-variant . ,(delay python2-activepapers))))
+    (license license:bsd-3)))
+
+(define-public python2-activepapers
+  (let ((base (package-with-python2
+               (strip-python2-variant python-activepapers))))
+    (package
+      (inherit base)
+      (arguments
+       (substitute-keyword-arguments (package-arguments base)
+         ((#:phases phases)
+          `(modify-phases ,phases
+             (delete 'delete-python2-code)
+             (add-after 'unpack 'delete-python3-code
+               (lambda _
+                 (for-each delete-file
+                           '("lib/activepapers/builtins3.py"
+                             "lib/activepapers/standardlib3.py"
+                             "lib/activepapers/utility3.py")))))))))))
+
+(define-public python-semver
+  (package
+    (name "python-semver")
+    (version "2.7.9")
+    (source
+      (origin
+        (method url-fetch)
+        (uri (pypi-uri "semver" version))
+        (sha256
+          (base32
+            "0hhgqppchv59rqj0yzi1prdg2nfsywqmjsqy2rycyxm0hvxmbyqz"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'patch-test-requirements
+           (lambda _
+             (substitute* "setup.py"
+               ;; Our Python is new enough.
+               (("'virtualenv<14\\.0\\.0'") "'virtualenv'"))
+             #t)))))
+    (native-inputs
+     `(("python-tox" ,python-tox)
+       ("python-virtualenv" ,python-virtualenv)))
+    (home-page "https://github.com/k-bx/python-semver")
+    (synopsis "Python helper for Semantic Versioning")
+    (description "This package provides a Python library for
+@url{Semantic Versioning, http://semver.org/}.")
+    (license license:bsd-3)))
+
+(define-public python2-semver
+  (package-with-python2 python-semver))
+
+(define-public python-pyro4
+  (package
+    (name "python-pyro4")
+    (version "4.74")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Pyro4" version))
+       (sha256
+        (base32
+         "0pzp7c6q3vvkxq0wy9lr6wd5wky40sajz69g697i5rb2q497pvc9"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-serpent" ,python-serpent)))
+    (home-page "https://pyro4.readthedocs.io")
+    (synopsis "Distributed object middleware for Python")
+    (description
+     "Pyro enables you to build applications in which objects can talk to each
+other over the network.  You can just use normal Python method calls to call
+objects on other machines, also known as remote procedure calls (RPC).")
+    (license license:expat)))
+
+(define-public python2-pyro
+  (package
+    (name "python2-pyro")
+    (version "3.16")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Pyro" version))
+       (file-name (string-append "Pyro-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0y75wzdqbjy565rpxaxscav4j8xg060sa90lnmb7aypgaf251v8v"))))
+    (build-system python-build-system)
+    (arguments
+     ;; Pyro is not compatible with Python 3
+     `(#:python ,python-2
+       ;; Pyro has no test cases for automatic execution
+       #:tests? #f))
+    (home-page "http://pythonhosted.org/Pyro/")
+    (synopsis "Distributed object manager for Python")
+    (description "Pyro is a Distributed Object Technology system
+written in Python that is designed to be easy to use.  It resembles
+Java's Remote Method Invocation (RMI).  It has less similarity to CORBA,
+which is a system and language independent Distributed Object Technology
+and has much more to offer than Pyro or RMI.  Pyro 3.x is no
+longer maintained.  New projects should use Pyro4 instead, which
+is the new Pyro version that is actively developed.")
+    (license license:expat)))
+
+(define-public python2-scientific
+  (package
+    (name "python2-scientific")
+    (version "2.9.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://bitbucket.org/khinsen/"
+                           "scientificpython/downloads/ScientificPython-"
+                           version ".tar.gz"))
+       (file-name (string-append "ScientificPython-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0fc69zhlsn9d2jvbzyjl9ah53vj598h84nkq230c83ahfvgzx5y3"))))
+    (build-system python-build-system)
+    (inputs
+     `(("netcdf" ,netcdf)))
+    (propagated-inputs
+     `(("python-numpy" ,python2-numpy-1.8)
+       ("python-pyro" ,python2-pyro)))
+    (arguments
+     ;; ScientificPython is not compatible with Python 3
+     `(#:python ,python-2
+       #:tests? #f ; No test suite
+       #:phases
+       (modify-phases %standard-phases
+         (replace 'build
+           (lambda* (#:key inputs #:allow-other-keys)
+             (zero? (system* "python" "setup.py" "build"
+                             (string-append "--netcdf_prefix="
+                                            (assoc-ref inputs "netcdf")))))))))
+    (home-page "https://bitbucket.org/khinsen/scientificpython")
+    (synopsis "Python modules for scientific computing")
+    (description "ScientificPython is a collection of Python modules that are
+useful for scientific computing.  Most modules are rather general (Geometry,
+physical units, automatic derivatives, ...) whereas others are more
+domain-specific (e.g. netCDF and PDB support).  The library is currently
+not actively maintained and works only with Python 2 and NumPy < 1.9.")
+    (license license:cecill-c)))
+
+(define-public python2-mmtk
+  (package
+    (name "python2-mmtk")
+    (version "2.7.11")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://bitbucket.org/khinsen/"
+                           "mmtk/downloads/MMTK-" version ".tar.gz"))
+       (file-name (string-append "MMTK-" version ".tar.gz"))
+       (sha256
+        (base32
+         "1d0nnjx4lwsvh8f99vv1r6gi50d93yba0adkz8b4zgv4za4c5862"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("netcdf" ,netcdf)))
+    (propagated-inputs
+     `(("python-scientific" ,python2-scientific)
+       ("python-tkinter" ,python-2 "tk")))
+    (arguments
+     `(#:python ,python-2
+       #:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'includes-from-scientific
+           (lambda* (#:key inputs #:allow-other-keys)
+             (mkdir-p "Include/Scientific")
+             (copy-recursively
+                     (string-append
+                      (assoc-ref inputs "python-scientific")
+                      "/include/python2.7/Scientific")
+                     "Include/Scientific"))))))
+    (home-page "http://dirac.cnrs-orleans.fr/MMTK")
+    (synopsis "Python library for molecular simulation")
+    (description "MMTK is a library for molecular simulations with an emphasis
+on biomolecules.  It provides widely used methods such as Molecular Dynamics
+and normal mode analysis, but also basic routines for implementing new methods
+for simulation and analysis.  The library is currently not actively maintained
+and works only with Python 2 and NumPy < 1.9.")
+    (license license:cecill-c)))
+
+(define-public python-phonenumbers
+  (package
+    (name "python-phonenumbers")
+    (version "8.9.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "phonenumbers" version))
+       (sha256
+        (base32
+         "03fmrgb4r8x3ykmddjs9i3zhs703in8smikj3a6447blqpimwyh1"))))
+    (build-system python-build-system)
+    (home-page
+     "https://github.com/daviddrysdale/python-phonenumbers")
+    (synopsis
+     "Python library for dealing with international phone numbers")
+    (description
+     "This package provides a Python port of Google's libphonenumber library.")
+    (license license:asl2.0)))
+
+(define-public python2-phonenumbers
+  (package-with-python2 python-phonenumbers))
+
+(define-public python-send2trash
+  (package
+    (name "python-send2trash")
+    (version "1.4.2")
+    (source
+     (origin (method url-fetch)
+             ;; Source tarball on PyPI doesn't include tests.
+             (uri (string-append "https://github.com/hsoft/send2trash/archive/"
+                                 version ".tar.gz"))
+             (file-name (string-append name "-" version ".tar.gz"))
+             (sha256
+              (base32
+               "0ffyhwjyx61slkdy38iwjc4gmj7fj9gs2q58f075gwvq630pzm9z"))))
+    (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (add-before 'check 'pre-check
+           (lambda _
+             (mkdir-p "/tmp/foo")
+             (setenv "HOME" "/tmp/foo")
+             #t)))))
+    (home-page "https://github.com/hsoft/send2trash")
+    (synopsis "Send files to the user's @file{~/Trash} directory")
+    (description "This package provides a Python library to send files to the
+user's @file{~/Trash} directory.")
+    (license license:bsd-3)))
+
+(define-public python2-send2trash
+  (package
+    (inherit (package-with-python2 python-send2trash))
+    (arguments
+     (substitute-keyword-arguments (package-arguments python-send2trash)
+       ((#:phases phases)
+        `(modify-phases ,phases
+           (add-before 'check 'setenv
+             (lambda _
+               (setenv "PYTHONPATH"
+                       (string-append (getcwd) ":" (getenv "PYTHONPATH")))
+               #t))))))
+    (properties `((python2-variant . ,(delay python-send2trash))))))
+
+(define-public python-yapf
+  (package
+    (name "python-yapf")
+    (version "0.24.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "yapf" version))
+       (sha256
+        (base32
+         "0anwby0ydmyzcsgjc5dn1ryddwvii4dq61vck447q0n96npnzfyf"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/google/yapf")
+    (synopsis "Formatter for Python code")
+    (description "YAPF is a formatter for Python code.  It's based off of
+@dfn{clang-format}, developed by Daniel Jasper.  In essence, the algorithm
+takes the code and reformats it to the best formatting that conforms to the
+style guide, even if the original code didn't violate the style guide.")
+    (license license:asl2.0)))
+
+(define-public python2-yapf
+  (package-with-python2 python-yapf))
+
+(define-public python-gyp
+  (let ((commit "5e2b3ddde7cda5eb6bc09a5546a76b00e49d888f")
+        (revision "0"))
+    (package
+      (name "python-gyp")
+      ;; Google does not release versions,
+      ;; based on second most recent commit date.
+      (version (git-version "0.0.0" revision commit))
+      (source
+       (origin
+         ;; Google does not release tarballs,
+         ;; git checkout is needed.
+         (method git-fetch)
+         (uri (git-reference
+               (url "https://chromium.googlesource.com/external/gyp")
+               (commit commit)))
+         (file-name (git-file-name name version))
+         (sha256
+          (base32
+           "0fr7nxcrk292djmxzpcjaphnsd123k31gp8jnd91vwknhq6snmv9"))))
+      (build-system python-build-system)
+      (home-page "https://gyp.gsrc.io/")
+      (synopsis "GYP is a Meta-Build system")
+      (description
+       "GYP builds build systems for large, cross platform applications.
+It can be used to generate XCode projects, Visual Studio projects, Ninja build
+files, and Makefiles.")
+      (license license:bsd-3))))
+
+(define-public python2-gyp
+  (package-with-python2 python-gyp))
+
+(define-public python-whatever
+  (package
+    (name "python-whatever")
+    (version "0.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/Suor/whatever/archive/" version
+                           ".tar.gz"))
+       (sha256
+        (base32
+         "1iqvnaf0zpc6b4rvbqq4xy45mszcscyzpzknv8wg6j84pbp22sap"))
+       (file-name (string-append name "-" version ".tar.gz"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+        (replace 'check
+          (lambda _
+            (invoke "py.test"))))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "http://github.com/Suor/whatever")
+    (synopsis "Make anonymous functions by partial application of operators")
+    (description "@code{whatever} provides an easy way to make anonymous
+functions by partial application of operators.")
+    (license license:bsd-3)))
+
+(define-public python2-whatever
+  (package-with-python2 python-whatever))
+
+(define-public python-funcy
+  (package
+    (name "python-funcy")
+    (version "1.10")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://github.com/Suor/funcy/archive/" version
+                           ".tar.gz"))
+       (sha256
+        (base32
+         "1fanxivsip29vgarw6dn39xym3q4pbxcpa11plpp548lvxajpahz"))
+       (file-name (string-append name "-" version ".tar.gz"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (invoke "py.test"))))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-whatever" ,python-whatever)))
+    (home-page "http://github.com/Suor/funcy")
+    (synopsis "Functional tools")
+    (description "@code{funcy} is a library that provides functional tools.
+Examples are:
+@enumerate
+@item merge - Merges collections of the same type
+@item walk - Type-preserving map
+@item select - Selects a part of a collection
+@item take - Takes the first n items of a collection
+@item first - Takes the first item of a collection
+@item remove - Predicated-removes items of a collection
+@item concat - Concatenates two collections
+@item flatten - Flattens a collection with subcollections
+@item distinct - Returns only distinct items
+@item split - Predicated-splits a collection
+@item split_at - Splits a collection at a given item
+@item group_by - Groups items by group
+@item pairwise - Pairs off adjacent items
+@item partial - Partially-applies a function
+@item curry - Curries a function
+@item compose - Composes functions
+@item complement - Complements a predicate
+@item all_fn - \"all\" with predicate
+@end enumerate")
+    (license license:bsd-3)))
+
+(define-public python2-funcy
+  (package-with-python2 python-funcy))
+
+(define-public python-isoweek
+  (package
+    (name "python-isoweek")
+    (version "1.3.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "isoweek" version))
+       (sha256
+        (base32
+         "1s7zsf0pab0l9gn6456qadnz5i5h90hafcjwnhx5mq23qjxggwvk"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/gisle/isoweek")
+    (synopsis "Objects representing a week")
+    (description "The @code{isoweek} module provide the class Week that
+implements the week definition of ISO 8601.  This standard also defines
+a notation for identifying weeks; yyyyWww (where the W is a literal).
+Week instances stringify to this form.")
+    (license license:bsd-3)))
+
+(define-public python2-isoweek
+  (package-with-python2 python-isoweek))
+
+(define-public python-tokenize-rt
+  (package
+    (name "python-tokenize-rt")
+    (version "2.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "tokenize-rt" version))
+       (sha256
+        (base32
+         "1yjvbz7rvrz31zjyax1cgy3xhf4wb3j18jwnj4bnl77ca4gliyiw"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/asottile/tokenize-rt")
+    (synopsis "Wrapper around the stdlib tokenize which roundtrips.")
+    (description
+     "This Python library is a wrapper around @code{tokenize} from the Python
+standard library.  It provides two additional tokens @code{ESCAPED_NL} and
+@code{UNIMPORTANT_WS}, and a @code{Token} data type.  Use @code{src_to_tokens}
+and @code{tokens_to_src} to roundtrip.")
+    (license license:expat)))
+
+(define-public python-future-fstrings
+  (package
+    (name "python-future-fstrings")
+    (version "0.4.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "future_fstrings" version))
+       (sha256
+        (base32
+         "0ydxqz2dvns44g55p8ix2x18qkfk3aaz0m0dc70f3g6n8js35h47"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-tokenize-rt" ,python-tokenize-rt)))
+    (home-page "https://github.com/asottile/future-fstrings")
+    (synopsis "Backport of fstrings to Python < 3.6")
+    (description
+     "This package provides a UTF-8 compatible encoding
+@code{future_fstrings}, which performs source manipulation.  It decodes the
+source bytes using the UTF-8 encoding and then rewrites Python 3.6 style
+@code{f} strings.")
+    (license license:expat)))
+
+(define-public python-typing
+  (package
+    (name "python-typing")
+    (version "3.6.6")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "typing" version))
+       (sha256
+        (base32
+         "0ba9acs4awx15bf9v3nrs781msbd2nx826906nj6fqks2bvca9s0"))))
+    (build-system python-build-system)
+    (home-page "https://docs.python.org/3/library/typing.html")
+    (synopsis "Type hints for Python")
+    (description "This is a backport of the standard library @code{typing}
+module to Python versions older than 3.5.  Typing defines a standard notation
+for Python function and variable type annotations.  The notation can be used
+for documenting code in a concise, standard format, and it has been designed
+to also be used by static and runtime type checkers, static analyzers, IDEs
+and other tools.")
+    (license license:psfl)))
+
+(define-public python2-typing
+  (package-with-python2 python-typing))
+
+(define-public bpython
+  (package
+    (name "bpython")
+    (version "0.17.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "bpython" version))
+       (sha256
+        (base32
+         "0bxhxi5zxdkrf8b4gwn0d363kdz3qnypjwhm1aydki53ph8ca1w9"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'remove-failing-test
+           (lambda _
+             ;; Remove failing test. FIXME: make it pass
+             (delete-file "bpython/test/test_args.py")
+             #t))
+         (add-after 'wrap 'add-aliases
+           ;; for symmetry to bpython2, add symlinks bypthon3, bpdb3, etc.
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let ((out (assoc-ref outputs "out")))
+               (for-each
+                (lambda (old new)
+                  (symlink old (string-append out "/bin/" new)))
+                '("bpython" "bpython-curses" "bpython-urwid" "bpdb")
+                '("bpython3" "bpython3-curses" "bpython3-urwid" "bpdb3")))
+             #t)))))
+    (propagated-inputs
+     `(("python-pygments" ,python-pygments)
+       ("python-requests" ,python-requests)
+       ("python-babel" ,python-babel) ; optional, for internationalization
+       ("python-curtsies" ,python-curtsies) ; >= 0.1.18
+       ("python-greenlet" ,python-greenlet)
+       ("python-urwid" ,python-urwid) ; for bpython-urwid only
+       ("python-six" ,python-six)))
+    (native-inputs
+     `(("python-sphinx" ,python-sphinx)
+       ("python-mock" ,python-mock)))
+    (home-page "https://bpython-interpreter.org/")
+    (synopsis "Fancy interface to the Python interpreter")
+    (description "Bpython is a fancy interface to the Python
+interpreter. bpython's main features are
+
+@enumerate
+@item in-line syntax highlighting,
+@item readline-like autocomplete with suggestions displayed as you type,
+@item expected parameter list for any Python function,
+@item \"rewind\" function to pop the last line of code from memory and
+      re-evaluate,
+@item send the code you've entered off to a pastebin,
+@item save the code you've entered to a file, and
+@item auto-indentation.
+@end enumerate")
+    (license license:expat)))
+
+(define-public bpython2
+  (let ((base (package-with-python2
+               (strip-python2-variant bpython))))
+    (package (inherit base)
+      (name "bpython2")
+      (arguments
+       `(#:python ,python-2
+         #:phases
+         (modify-phases %standard-phases
+         (add-after 'unpack 'remove-failing-test
+           (lambda _
+             ;; Remove failing test. FIXME: make it pass
+             (delete-file "bpython/test/test_args.py")
+             ;; Disable failing test-cases (renaming inhibits they are
+             ;; discovered)
+             (substitute* "bpython/test/test_curtsies_repl.py"
+               (("^(\\s*def )(test_get_last_word_with_prev_line\\W)" _ a b)
+                (string-append a "xxx_off_" b))
+               (("^(\\s*def )(test_complex\\W)" _ a b)
+                (string-append a "xxx_off_" b)))
+             #t))
+           (add-before 'build 'rename-scripts
+             ;; rename the scripts to bypthon2, bpdb2, etc.
+             (lambda _
+               (substitute* "setup.py"
+                 (("^(\\s+'bpdb)(\\s+=.*',?)\\s*?$" _ name rest)
+                  (string-append name "2" rest "\n"))
+                 (("^(\\s+'bpython)(-\\S+)?(\\s+=.*',?)\\s*?$" _ name sub rest)
+                  (string-append name "2" (or sub "") rest "\n")))
+               #t))))))))
+
+(define-public python-pyinotify
+  (package
+    (name "python-pyinotify")
+    (version "0.9.6")
+    (source (origin
+              (method url-fetch)
+              (uri (pypi-uri "pyinotify" version))
+              (sha256
+               (base32
+                "1x3i9wmzw33fpkis203alygfnrkcmq9w1aydcm887jh6frfqm6cw"))))
+    (build-system python-build-system)
+    (arguments `(#:tests? #f))          ;no tests
+    (home-page "https://github.com/seb-m/pyinotify")
+    (synopsis "Python library for monitoring inotify events")
+    (description
+     "@code{pyinotify} provides a Python interface for monitoring
+file system events on Linux.")
+    (license license:expat)))
+
+(define-public python2-pyinotify
+  (package-with-python2 python-pyinotify))
+
+;; Ada parser uses this version.
+(define-public python2-quex-0.67.3
+  (package
+    (name "python2-quex")
+    (version "0.67.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "mirror://sourceforge/quex/HISTORY/"
+                           (version-major+minor version)
+                           "/quex-" version ".zip"))
+       (sha256
+        (base32
+         "14gv8ll3ipqv4kyc2xiy891nrmjl4ic823zfyx8hassagyclyppw"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("unzip" ,unzip)))
+    (arguments
+     `(#:python ,python-2
+       #:tests? #f
+       #:phases
+       (modify-phases %standard-phases
+         (delete 'configure)
+         (delete 'build)
+         (replace 'install
+           (lambda* (#:key outputs #:allow-other-keys)
+             (let* ((out (assoc-ref outputs "out"))
+                    (share/quex (string-append out "/share/quex"))
+                    (bin (string-append out "/bin")))
+               (copy-recursively "." share/quex)
+               (mkdir-p bin)
+               (symlink (string-append share/quex "/quex-exe.py")
+                        (string-append bin "/quex"))
+               #t))))))
+    (native-search-paths
+     (list (search-path-specification
+            (variable "QUEX_PATH")
+            (files '("share/quex")))))
+    (home-page "http://quex.sourceforge.net/")
+    (synopsis "Lexical analyzer generator in Python")
+    (description "@code{quex} is a lexical analyzer generator in Python.")
+    (license license:lgpl2.1+)))        ; Non-military
+
+(define-public python2-quex
+  (package (inherit python2-quex-0.67.3)
+    (name "python2-quex")
+    (version "0.68.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "mirror://sourceforge/quex/DOWNLOAD/quex-" version ".tar.gz"))
+       (sha256
+        (base32
+         "0svc9nla3b9145d6b7fb9dizx412l3difzqw0ilh9lz52nsixw8j"))
+       (file-name (string-append name "-" version ".tar.gz"))))))
+
+(define-public python-more-itertools
+  (package
+    (name "python-more-itertools")
+    (version "4.3.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "more-itertools" version))
+       (sha256
+        (base32
+         "17h3na0rdh8xq30w4b9pizgkdxmm51896bxw600x84jflg9vaxn4"))))
+    (build-system python-build-system)
+    (arguments
+     `(,@(if (any (cute string-prefix? <> (or (%current-system)
+                                              (%current-target-system)))
+                  '("armhf" "i686"))
+        '(#:phases
+          (modify-phases %standard-phases
+          ;; This is required for 32-bit hardware.
+          ;; TODO: Try to remove this when upgrading.
+          (add-after 'unpack 'patch-test
+            (lambda _
+              (substitute* "more_itertools/tests/test_more.py"
+                (("10 \\*\\* 10") "9 ** 9"))
+              #t))))
+        '())))
+    (propagated-inputs
+     `(("python-six" ,python-six-bootstrap)))
+    (home-page "https://github.com/erikrose/more-itertools")
+    (synopsis "More routines for operating on iterables, beyond itertools")
+    (description "Python's built-in @code{itertools} module implements a
+number of iterator building blocks inspired by constructs from APL, Haskell,
+and SML.  @code{more-itertools} includes additional building blocks for
+working with iterables.")
+    (license license:expat)))
+
+(define-public python2-more-itertools
+  (package-with-python2 python-more-itertools))
+
+(define-public python-latexcodec
+  (package
+    (name "python-latexcodec")
+    (version "1.0.5")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "latexcodec" version))
+       (sha256
+        (base32
+         "0zdd1gf24i83ykadx0y30n3001j43scqr2saql3vckk5c39dj1wn"))))
+    (build-system python-build-system)
+    (inputs
+     `(("python-six" ,python-six)))
+    (home-page "https://readthedocs.org/projects/latexcodec/")
+    (synopsis "Work with LaTeX code in Python")
+    (description "Lexer and codec to work with LaTeX code in Python.")
+    (license license:expat)))
+
+(define-public python-pybtex
+  (package
+    (name "python-pybtex")
+    (version "0.21")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "pybtex" version))
+       (sha256
+        (base32
+         "00300j8dn5pxq4ndxmfmbmycg2znawkqs49val2x6jlmfiy6r2mg"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-nose" ,python-nose)))
+    (inputs
+     `(("python-latexcodec" ,python-latexcodec)
+       ("python-pyyaml" ,python-pyyaml)
+       ("python-six" ,python-six)))
+    (arguments
+     `(#:test-target "nosetests"))
+    (home-page "https://pybtex.org/")
+    (synopsis "BibTeX-compatible bibliography processor")
+    (description "Pybtex is a BibTeX-compatible bibliography processor written
+in Python.  You can simply type pybtex instead of bibtex.")
+    (license license:expat)))
+
+(define-public python-onetimepass
+  (package
+    (name "python-onetimepass")
+    (version "1.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "onetimepass" version))
+       (sha256
+        (base32 "09vagxgbq78wvq4xbikmn2hpqqsa2i96kqsmphf7dqynfv0dlsd5"))))
+    (build-system python-build-system)
+    (propagated-inputs `(("python-six" ,python-six)))
+    (home-page "https://github.com/tadeck/onetimepass/")
+    (synopsis "One-time password library")
+    (description "Python one-time password library for HMAC-based (HOTP) and
+time-based (TOTP) passwords.")
+    (license license:expat)))
+
+(define-public python-parso
+  (package
+    (name "python-parso")
+    (version "0.3.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "parso" version))
+       (sha256
+        (base32
+         "18p89iwcm8mnf380f92g9w0bhx5km8wxp392vvjcq4y1ld1llw1m"))))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (build-system python-build-system)
+    (home-page "https://github.com/davidhalter/parso")
+    (synopsis "Python Parser")
+    (description "Parso is a Python parser that supports error recovery and
+round-trip parsing for different Python versions (in multiple Python versions).
+Parso is also able to list multiple syntax errors in your Python file.")
+    (license license:expat)))
+
+(define-public python2-parso
+  (package-with-python2 python-parso))
+
+(define-public python-async-generator
+  (package
+    (name "python-async-generator")
+    (version "1.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "async_generator" version))
+       (sha256
+        (base32
+         "0wc3hidz1q85cja93k5pzybn0fprfnqyrv4qlkdqdzklc5f4dmdp"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)))
+    (home-page "https://github.com/python-trio/async_generator")
+    (synopsis "Async generators and context managers for Python 3.5+")
+    (description "@code{async_generator} back-ports Python 3.6's native async
+generators and Python 3.7's context managers into Python 3.5.")
+    ;; Dual licensed.
+    (license (list license:expat license:asl2.0))))
+
+(define-public python-async-timeout
+  (package
+    (name "python-async-timeout")
+    (version "3.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "async-timeout" version))
+       (sha256
+        (base32
+         "0pscbyr840m7fyfc3r8zv9kgkwdcn9f78p7zsrczciwd09m82g0c"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/aio-libs/async_timeout/")
+    (synopsis "Timeout context manager for asyncio programs")
+    (description "@code{async-timeout} provides a timeout timeout context
+manager compatible with @code{asyncio}.")
+    (license license:asl2.0)))
+
+(define-public python-glob2
+  (package
+    (name "python-glob2")
+    (version "0.6")
+    (source (origin
+              (method url-fetch)
+              (uri (string-append
+                    "https://github.com/miracle2k/python-glob2/archive/"
+                    version
+                    ".tar.gz"))
+              (sha256
+               (base32
+                "0ja168f0dz4kbz4m06dm0rd3acaypk6hjx2km541pw22y9s40mag"))
+              (file-name (string-append name "-" version ".tar.gz"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/miracle2k/python-glob2/")
+    (synopsis "Extended Version of the python buildin glob module")
+    (description "This is an extended version of the Python
+@url{http://docs.python.org/library/glob.html, built-in glob module} which
+adds:
+
+@itemize
+@item The ability to capture the text matched by glob patterns, and return
+those matches alongside the file names.
+@item A recursive @code{**} globbing syntax, akin for example to the
+@code{globstar} option of Bash.
+@item The ability to replace the file system functions used, in order to glob
+on virtual file systems.
+@item Compatible with Python 2 and Python 3 (tested with 3.3).
+@end itemize
+
+Glob2 currently based on the glob code from Python 3.3.1.")
+    (license license:bsd-2)))
+
+(define-public python2-glob2
+  (package-with-python2 python-glob2))
+
+(define-public python-gipc
+  (package
+    (name "python-gipc")
+    (version "0.6.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "gipc" version ".zip"))
+       (sha256
+        (base32
+         "0pd9by719qh882hqs6xpby61sn1x5h98hms5p2p8yqnycrf1s0h2"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("unzip" ,unzip)))
+    (propagated-inputs
+     `(("python-gevent" ,python-gevent)))
+    (home-page "http://gehrcke.de/gipc")
+    (synopsis "Child process management in the context of gevent")
+    (description "Usage of Python's multiprocessing package in a
+gevent-powered application may raise problems.  With @code{gipc},
+process-based child processes can safely be created anywhere within a
+gevent-powered application.")
+    (license license:expat)))
+
+(define-public python2-gipc
+  (package-with-python2 python-gipc))
+
+(define-public python-fusepy
+  (package
+    (name "python-fusepy")
+    (version "2.0.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "fusepy" version))
+       (sha256
+        (base32
+         "0v5grm4zyf58hsplwsxfbihddw95lz9w8cy3rpzbyha287swgx8h"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'set-library-file-name
+           (lambda* (#:key inputs #:allow-other-keys)
+             (let ((fuse (assoc-ref inputs "fuse")))
+               (substitute* "fuse.py"
+                 (("find_library\\('fuse'\\)")
+                  (string-append "'" fuse "/lib/libfuse.so'")))
+               #t))))))
+    (propagated-inputs
+     `(("fuse" ,fuse)))
+    (home-page "https://github.com/fusepy/fusepy")
+    (synopsis "Simple ctypes bindings for FUSE")
+    (description "Python module that provides a simple interface to FUSE and
+MacFUSE.  The binding is created using the standard @code{ctypes} library.")
+    (license license:isc)))
+
+(define-public python2-fusepy
+  (package-with-python2 python-fusepy))
+
+(define-public python2-gdrivefs
+  (package
+    (name "python2-gdrivefs")
+    (version "0.14.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "gdrivefs" version))
+       (sha256
+        (base32
+         "0v9sp2cfg4ki3wagkwf3rnfpjhvgf845anz3757il9z95yvvcvb7"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:python ,python-2
+       #:phases
+       (modify-phases %standard-phases
+         (add-before 'build 'patch-setup-py
+           (lambda _
+             ;; Update requirements from dependency==version
+             ;; to dependency>=version
+             (substitute* "gdrivefs/resources/requirements.txt"
+               (("==") ">="))
+             #t)))))
+    (native-inputs
+     `(("python2-gipc" ,python2-gipc)
+       ("python2-gevent" ,python2-gevent)
+       ("python2-greenlet" ,python2-greenlet)
+       ("python2-httplib2" ,python2-httplib2)
+       ("python2-uritemplate" ,python2-uritemplate)
+       ("python2-oauth2client" ,python2-oauth2client)
+       ("python2-six" ,python2-six)))
+    (propagated-inputs
+     `(("python2-dateutil" ,python2-dateutil)
+       ("python2-fusepy" ,python2-fusepy)
+       ("python2-google-api-client" ,python2-google-api-client)))
+    (home-page "https://github.com/dsoprea/GDriveFS")
+    (synopsis "Mount Google Drive as a local file system")
+    (description "@code{gdrivefs} provides a FUSE wrapper for Google Drive
+under Python 2.7.")
+    (license license:gpl2)))
+
+(define-public pybind11
+  (package
+    (name "pybind11")
+    (version "2.2.4")
+    (source (origin
+              (method git-fetch)
+              (uri (git-reference
+                    (url "https://github.com/pybind/pybind11.git")
+                    (commit (string-append "v" version))))
+              (sha256
+               (base32
+                "0pa79ymcasv8br5ifbx7878id5py2jpjac3i20cqxr6gs9l6ivlv"))
+              (file-name (git-file-name name version))))
+    (build-system cmake-build-system)
+    (native-inputs
+     `(("python" ,python)
+       ("python-pytest" ,python-pytest)))
+    (arguments
+     `(#:test-target "check"))
+    (home-page "https://github.com/pybind/pybind11/")
+    (synopsis "Seamless operability between C++11 and Python")
+    (description "pybind11 is a lightweight header-only library that exposes
+C++ types in Python and vice versa, mainly to create Python bindings of
+existing C++ code.  Its goals and syntax are similar to the excellent
+Boost.Python library by David Abrahams: to minimize boilerplate code in
+traditional extension modules by inferring type information using compile-time
+introspection.")
+    (license license:expat)))
+
+(define-public python-fasteners
+  (package
+    (name "python-fasteners")
+    (version "0.14.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "fasteners" version))
+       (sha256
+        (base32
+         "063y20kx01ihbz2mziapmjxi2cd0dq48jzg587xdsdp07xvpcz22"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-monotonic" ,python-monotonic)
+       ("python-six" ,python-six)
+       ("python-testtools" ,python-testtools)))
+    (home-page "https://github.com/harlowja/fasteners")
+    (synopsis "Python package that provides useful locks")
+    (description
+     "This package provides a Python program that provides following locks:
+
+@itemize
+@item Locking decorator
+@item Reader-writer locks
+@item Inter-process locks
+@item Generic helpers
+@end itemize\n")
+    (properties `((python2-variant . ,(delay python2-fasteners))))
+    (license license:asl2.0)))
+
+(define-public python2-fasteners
+  (let ((base (package-with-python2 (strip-python2-variant python-fasteners))))
+    (package
+      (inherit base)
+      (propagated-inputs
+       `(("python2-futures" ,python2-futures)
+         ,@(package-propagated-inputs base))))))
+
+(define-public python-requests-file
+  (package
+    (name "python-requests-file")
+    (version "1.4.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "requests-file" version))
+       (sha256
+        (base32
+         "1yp2jaxg3v86pia0q512dg3hz6s9y5vzdivsgrba1kds05ial14g"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-requests" ,python-requests)
+       ("python-six" ,python-six)))
+    (home-page
+     "https://github.com/dashea/requests-file")
+    (synopsis "File transport adapter for Requests")
+    (description
+     "Requests-File is a transport adapter for use with the Requests Python
+library to allow local filesystem access via file:// URLs.")
+    (license license:asl2.0)))
+
+(define-public python2-requests-file
+  (package-with-python2 python-requests-file))
+
+(define-public python-tldextract
+  (package
+    (name "python-tldextract")
+    (version "2.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "tldextract" version))
+       (sha256
+        (base32
+         "1d5s8v6kpsgazyahflhji1cfdcf89rv7l7z55v774bhzvcjp2y99"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-responses" ,python-responses)))
+    (propagated-inputs
+     `(("python-idna" ,python-idna)
+       ("python-requests" ,python-requests)
+       ("python-requests-file" ,python-requests-file)))
+    (home-page
+     "https://github.com/john-kurkowski/tldextract")
+    (synopsis
+     "Separate the TLD from the registered domain and subdomains of a URL")
+    (description
+     "TLDExtract accurately separates the TLD from the registered domain and
+subdomains of a URL, using the Public Suffix List.  By default, this includes
+the public ICANN TLDs and their exceptions.  It can optionally support the
+Public Suffix List's private domains as well.")
+    (license license:bsd-3)))
+
+(define-public python2-tldextract
+  (package-with-python2 python-tldextract))
+
+(define-public python-pynamecheap
+  (package
+    (name "python-pynamecheap")
+    (version "0.0.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "PyNamecheap" version))
+       (sha256
+        (base32
+         "0wkbwz208j8nfrsmzmclvxg22ymknn0mlz76wbdza9k2bx2zja6l"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-requests" ,python-requests)))
+    (home-page
+     "https://github.com/Bemmu/PyNamecheap")
+    (synopsis
+     "Namecheap API client in Python")
+    (description
+     "PyNamecheap is a Namecheap API client in Python.")
+    (license license:expat)))
+
+(define-public python2-pynamecheap
+  (package-with-python2 python-pynamecheap))
+
+(define-public python-dns-lexicon
+  (package
+    (name "python-dns-lexicon")
+    (version "2.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "dns-lexicon" version))
+       (sha256
+        (base32
+         "0jdn3ns71bsybr7njgsqr9xlxsqh7zh6phn4ld0liazqdn2l5f6m"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:tests? #f))                    ;requires internet access
+    (propagated-inputs
+     `(("python-future" ,python-future)
+       ("python-pynamecheap" ,python-pynamecheap)
+       ("python-requests" ,python-requests)
+       ("python-tldextract" ,python-tldextract)
+       ("python-urllib3" ,python-urllib3)))
+    (home-page "https://github.com/AnalogJ/lexicon")
+    (synopsis
+     "Manipulate DNS records on various DNS providers")
+    (description
+     "Lexicon provides a way to manipulate DNS records on multiple DNS
+providers in a standardized way.  It has a CLI but it can also be used as a
+Python library.  It was designed to be used in automation, specifically with
+Let's Encrypt.")
+    (license license:expat)))
+
+(define-public python2-dns-lexicon
+  (package-with-python2 python-dns-lexicon))
+
+(define-public python-commandlines
+  (package
+    (name "python-commandlines")
+    (version "0.4.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "commandlines" version))
+       (sha256
+        (base32
+         "0r7xcr0knv02p4mswa2bng61nn8nbhhrs6kvdnb9bb3hhjvm1dl6"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/chrissimpkins/commandlines")
+    (synopsis "Command line argument to object parsing library")
+    (description
+     "@code{Commandlines} is a Python library for command line application
+development that supports command line argument parsing, command string
+validation testing and application logic.")
+    (license license:expat)))
+
+;; Make sure to upgrade python-llvmlite in (gnu packages llvm) together with
+;; python-numba.  They have a very unflexible relationship.
+(define-public python-numba
+  (package
+    (name "python-numba")
+    (version "0.39.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "numba" version))
+       (sha256
+        (base32
+         "1bibvkwga1v8293i9ivl469d8bzgabn3vgr2ig7c1i68v8frsx07"))))
+    (build-system python-build-system)
+    (arguments
+     `(#:modules ((guix build utils)
+                  (guix build python-build-system)
+                  (ice-9 ftw)
+                  (srfi srfi-1)
+                  (srfi srfi-26))
+       #:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'disable-proprietary-features
+           (lambda _
+             (setenv "NUMBA_DISABLE_HSA" "1")
+             (setenv "NUMBA_DISABLE_CUDA" "1")
+             #t))
+         (add-after 'unpack 'remove-failing-tests
+           (lambda _
+             ;; FIXME: these tests fail for unknown reasons:
+             ;; test_non_writable_pycache, test_non_creatable_pycache, and
+             ;; test_frozen (all in numba.tests.test_dispatcher.TestCache).
+             (substitute* "numba/tests/test_dispatcher.py"
+               (("def test(_non_writable_pycache)" _ m)
+                (string-append "def guix_skip" m))
+               (("def test(_non_creatable_pycache)" _ m)
+                (string-append "def guix_skip" m))
+               (("def test(_frozen)" _ m)
+                (string-append "def guix_skip" m)))
+
+             ;; These tests fail because we don't run the tests from the build
+             ;; directory: test_setup_py_distutils, test_setup_py_setuptools
+             ;; They ar in numba.tests.test_pycc.TestDistutilsSupport.
+             (substitute* "numba/tests/test_pycc.py"
+               (("def test(_setup_py_distutils|_setup_py_setuptools)" _ m)
+                (string-append "def guix_skip" m)))
+             #t))
+         (replace 'check
+           (lambda _
+             (let ((cwd (getcwd)))
+               (setenv "PYTHONPATH"
+                       (string-append cwd "/build/"
+                                      (find (cut string-prefix? "lib" <>)
+                                            (scandir (string-append cwd "/build")))
+                                      ":"
+                                      (getenv "PYTHONPATH")))
+               ;; Something is wrong with the PYTHONPATH when running the
+               ;; tests from the build directory, as it complains about not being
+               ;; able to import certain modules.
+               (with-directory-excursion "/tmp"
+                 (invoke "python3" "-m" "numba.runtests" "-v" "-m")))
+             #t)))))
+    (propagated-inputs
+     `(("python-llvmlite" ,python-llvmlite)
+       ("python-numpy" ,python-numpy)
+       ("python-singledispatch" ,python-singledispatch)))
+    ;; Needed for tests.
+    (inputs
+     `(("python-jinja2" ,python-jinja2)
+       ("python-pygments" ,python-pygments)))
+    (home-page "https://numba.pydata.org")
+    (synopsis "Compile Python code using LLVM")
+    (description "Numba gives you the power to speed up your applications with
+high performance functions written directly in Python.  With a few
+annotations, array-oriented and math-heavy Python code can be just-in-time
+compiled to native machine instructions, similar in performance to C, C++ and
+Fortran, without having to switch languages or Python interpreters.
+
+Numba works by generating optimized machine code using the LLVM compiler
+infrastructure at import time, runtime, or statically (using the included pycc
+tool).")
+    (license license:bsd-3)))
+
+(define-public python-anndata
+  (package
+    (name "python-anndata")
+    (version "0.6.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "anndata" version))
+       (sha256
+        (base32
+         "1fh461xyyc7pcrjfgd013bdc2alf53r46ss3gfw3431mbb1gappi"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-h5py" ,python-h5py)
+       ("python-natsort" ,python-natsort)
+       ("python-pandas" ,python-pandas)
+       ("python-scipy" ,python-scipy)))
+    (home-page "https://github.com/theislab/anndata")
+    (synopsis "Annotated data for data analysis pipelines")
+    (description "Anndata is a package for simple (functional) high-level APIs
+for data analysis pipelines.  In this context, it provides an efficient,
+scalable way of keeping track of data together with learned annotations and
+reduces the code overhead typically encountered when using a mostly
+object-oriented library such as @code{scikit-learn}.")
+    (license license:bsd-3)))
+
+(define-public python-dill
+  (package
+    (name "python-dill")
+    (version "0.2.8.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "dill" version))
+       (sha256
+        (base32
+         "1cymzn9fxwdy33h21zkk4gqgzvd25110hh3zdqnvnwa3p52c4kb2"))))
+    (build-system python-build-system)
+    ;; FIXME: The check phase fails with "don't know how to make test".
+    (arguments '(#:tests? #f))
+    (home-page "https://pypi.org/project/dill")
+    (synopsis "Serialize all of Python")
+    (description "Dill extends Python's @code{pickle} module for serializing
+and de-serializing Python objects to the majority of the built-in Python
+types.  Dill provides the user the same interface as the @code{pickle} module,
+and also includes some additional features.  In addition to pickling Python
+objects, @code{dill} provides the ability to save the state of an interpreter
+session in a single command.  Hence, it would be feasable to save a
+interpreter session, close the interpreter, ship the pickled file to another
+computer, open a new interpreter, unpickle the session and thus continue from
+the saved state of the original interpreter session.")
+    (license license:bsd-3)))
+
+(define-public python-multiprocess
+  (package
+    (name "python-multiprocess")
+    (version "0.70.6.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "multiprocess" version))
+       (sha256
+        (base32
+         "1ip5caz67b3q0553mr8gm8xwsb8x500jn8ml0gihgyfy52m2ypcq"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-dill" ,python-dill)))
+    (home-page "https://pypi.org/project/multiprocess")
+    (synopsis "Multiprocessing and multithreading in Python")
+    (description
+     "This package is a fork of the multiprocessing Python package, a package
+which supports the spawning of processes using the API of the standard
+library's @code{threading} module.")
+    (license license:bsd-3)))
+
+(define-public python-toolz
+  (package
+    (name "python-toolz")
+    (version "0.9.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "toolz" version))
+       (sha256
+        (base32
+         "1j9i7fdjnx9dz35fdj5gvgxx6585ja9sxgaiv65if77nlxz0m7wj"))))
+    (build-system python-build-system)
+    ;; FIXME: tests cannot be computed: "Can't perform this operation for
+    ;; unregistered loader type"
+    (arguments '(#:tests? #f))
+    (home-page "https://github.com/pytoolz/toolz/")
+    (synopsis "List processing tools and functional utilities")
+    (description
+     "This package provides a set of utility functions for iterators,
+functions, and dictionaries.")
+    (license license:bsd-3)))
+
+(define-public python2-toolz
+  (package-with-python2 python-toolz))
+
+(define-public python-cytoolz
+  (package
+    (name "python-cytoolz")
+    (version "0.9.0.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "cytoolz" version))
+       (sha256
+        (base32
+         "1r80p88hm3f3r4zpixzr047y5hw4bzy41m4xywnhycda83x0dk44"))))
+    (build-system python-build-system)
+    ;; FIXME: tests fail with "module 'cytoolz.curried' has no attribute
+    ;; 'exceptions'"
+    (arguments '(#:tests? #f))
+    (propagated-inputs
+     `(("python-toolz" ,python-toolz)))
+    (native-inputs
+     `(("python-cython" ,python-cython)))
+    (home-page "https://github.com/pytoolz/cytoolz")
+    (synopsis "High performance functional utilities")
+    (description
+     "The cytoolz package implements the same API as provided by toolz.  The
+main differences are that @code{cytoolz} is faster and cytoolz offers a C API
+that is accessible to other projects developed in Cython.")
+    (license license:bsd-3)))
+
+(define-public python-sortedcontainers
+  (package
+    (name "python-sortedcontainers")
+    (version "2.0.4")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "sortedcontainers" version))
+       (sha256
+        (base32
+         "10hrk2k0hbf9x78vd3f0lj277m1yzfhzzxr0hja718liwb398wk0"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-tox" ,python-tox)))
+    (home-page "http://www.grantjenks.com/docs/sortedcontainers/")
+    (synopsis "Sorted List, Sorted Dict, Sorted Set")
+    (description
+     "This package provides a sorted collections library, written in
+pure-Python.")
+    (license license:asl2.0)))
+
+(define-public python-cloudpickle
+  (package
+    (name "python-cloudpickle")
+    (version "0.6.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "cloudpickle" version))
+       (sha256
+        (base32
+         "1wdw89mlm7fqa3fm3ymskx05jrys66n8m1z1a8s0mss0799ahsgi"))))
+    (build-system python-build-system)
+    ;; FIXME: there are 5 errors in 122 tests:
+    ;; ERROR: test_function_pickle_compat_0_4_0 (tests.cloudpickle_test.CloudPickleTest)
+    ;; ERROR: test_function_pickle_compat_0_4_1 (tests.cloudpickle_test.CloudPickleTest)
+    ;; ERROR: test_function_pickle_compat_0_4_0 (tests.cloudpickle_test.Protocol2CloudPickleTest)
+    ;; ERROR: test_function_pickle_compat_0_4_1 (tests.cloudpickle_test.Protocol2CloudPickleTest)
+    ;; ERROR: test_temp_file (tests.cloudpickle_file_test.CloudPickleFileTests)
+    ;; TypeError: cannot serialize '_io.BufferedRandom' object
+    (arguments '(#:tests? #f))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-mock" ,python-mock)
+       ("python-tornado" ,python-tornado)))
+    (home-page "https://github.com/cloudpipe/cloudpickle")
+    (synopsis "Extended pickling support for Python objects")
+    (description
+     "Cloudpickle makes it possible to serialize Python constructs not
+supported by the default pickle module from the Python standard library.  It
+is especially useful for cluster computing where Python expressions are
+shipped over the network to execute on remote hosts, possibly close to the
+data.")
+    (license license:bsd-3)))
+
+(define-public python2-cloudpickle
+  (package-with-python2 python-cloudpickle))
+
+(define-public python-locket
+  (package
+    (name "python-locket")
+    (version "0.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "locket" version))
+       (sha256
+        (base32
+         "1d4z2zngrpqkrfhnd4yhysh66kjn4mblys2l06sh5dix2p0n7vhz"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/mwilliamson/locket.py")
+    (synopsis "File-based locks for Python")
+    (description
+     "Locket implements a lock that can be used by multiple processes provided
+they use the same path.")
+    (license license:bsd-2)))
+
+(define-public python2-locket
+  (package-with-python2 python-locket))
+
+(define-public python-blosc
+  (package
+    (name "python-blosc")
+    (version "1.5.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "blosc" version))
+       (sha256
+        (base32
+         "1cm91c6r431yla2mbs4895bgiianjf30dfz14vvv99dslygd65jw"))))
+    (build-system python-build-system)
+    ;; FIXME: all tests pass, but then this error is printed:
+    ;; TypeError: calling <function run at 0x7ffff2568d90> returned None, not a test
+    (arguments '(#:tests? #f))
+    (propagated-inputs
+     `(("python-numpy" ,python-numpy)))
+    (home-page "https://github.com/blosc/python-blosc")
+    (synopsis "Python wrapper for the Blosc data compressor library")
+    (description "Blosc is a high performance compressor optimized for binary
+data.  It has been designed to transmit data to the processor cache faster
+than the traditional, non-compressed, direct memory fetch approach via a
+@code{memcpy()} system call.
+
+Blosc works well for compressing numerical arrays that contains data with
+relatively low entropy, like sparse data, time series, grids with
+regular-spaced values, etc.
+
+This Python package wraps the Blosc library.")
+    (license license:bsd-3)))
+
+(define-public python2-blosc
+  (package-with-python2 python-blosc))
+
+(define-public python-partd
+  (package
+    (name "python-partd")
+    (version "0.3.9")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "partd" version))
+       (sha256
+        (base32
+         "0sz6rwlnl4fqq220pyz863cnv0gjdxl4m7lscl71ishl5z0xkmhz"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-blosc" ,python-blosc)
+       ("python-locket" ,python-locket)
+       ("python-numpy" ,python-numpy)
+       ("python-pandas" ,python-pandas)
+       ("python-pyzmq" ,python-pyzmq)
+       ("python-toolz" ,python-toolz)))
+    (home-page "https://github.com/dask/partd/")
+    (synopsis "Appendable key-value storage")
+    (description "Partd stores key-value pairs.  Values are raw bytes.  We
+append on old values.  Partd excels at shuffling operations.")
+    (license license:bsd-3)))
+
+(define-public python2-partd
+  (package-with-python2 python-partd))
+
+(define-public python-dask
+  (package
+    (name "python-dask")
+    (version "1.0.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "dask" version))
+       (sha256
+        (base32
+         "1xwz8h020ipwav2p5gcq9pskya1cvzd6hjyvd06dvr3w5lxlmym1"))))
+    (build-system python-build-system)
+    ;; A single test out of 5000+ fails.  This test is marked as xfail when
+    ;; pytest-xdist is used.
+    (arguments
+     `(#:phases
+       (modify-phases %standard-phases
+         (add-after 'unpack 'disable-broken-test
+           (lambda _
+             (substitute* "dask/tests/test_threaded.py"
+               (("def test_interrupt\\(\\)" m)
+                (string-append "@pytest.mark.skip(reason=\"Disabled by Guix\")\n"
+                               m)))
+             (when (which "python2")
+               ;; This test fails with recent Pandas:
+               ;; <https://github.com/dask/dask/issues/3794>.
+               (substitute* "dask/dataframe/tests/test_dataframe.py"
+                 (("def test_info\\(\\)" m)
+                  (string-append "@pytest.mark.skip(reason=\"Disabled by Guix\")\n"
+                                 m))))
+             #t))
+         (replace 'check
+           (lambda _ (invoke "pytest" "-vv"))))))
+    (propagated-inputs
+     `(("python-cloudpickle" ,python-cloudpickle)
+       ("python-numpy" ,python-numpy)
+       ("python-pandas" ,python-pandas)
+       ("python-partd" ,python-partd)
+       ("python-toolz" ,python-toolz)
+       ("python-pyyaml" ,python-pyyaml)))
+    (native-inputs
+     `(("python-pytest" ,python-pytest)
+       ("python-pytest-runner" ,python-pytest-runner)))
+    (home-page "https://github.com/dask/dask/")
+    (synopsis "Parallel computing with task scheduling")
+    (description
+     "Dask is a flexible parallel computing library for analytics.  It
+consists of two components: dynamic task scheduling optimized for computation,
+and large data collections like parallel arrays, dataframes, and lists that
+extend common interfaces like NumPy, Pandas, or Python iterators to
+larger-than-memory or distributed environments.  These parallel collections
+run on top of the dynamic task schedulers. ")
+    (license license:bsd-3)))
+
+(define-public python2-dask
+  (package-with-python2 python-dask))
+
+(define-public python-ilinkedlist
+  (package
+    (name "python-ilinkedlist")
+    (version "0.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ilinkedlist" version))
+       (sha256
+        (base32
+         "0nrw4sr3afldrp7073hvc0rgdz282s0l819jdmj1i6nn05v33h0l"))))
+    (build-system python-build-system)
+    (native-inputs `(("python-pytest" ,python-pytest)))
+    (inputs `(("python" ,python)))
+    (home-page "https://github.com/luther9/ilinkedlist-py")
+    (synopsis "Immutable linked list library")
+    (description
+     "This is a implementation of immutable linked lists for Python.  It
+contains @code{nil} (the empty linked list) and a @code{Pair} class for nodes.
+Since a linked list is treated as immutable, it is hashable, and its length
+can be retrieved in constant time.  Some of the terminology is inspired by
+LISP.  It is possible to create an improper list by creating a @code{Pair}
+with a non-list @code{cdr}.")
+    (license license:gpl3+)))
+
+(define-public python-readlike
+  (package
+    (name "python-readlike")
+    (version "0.1.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "readlike" version))
+       (sha256
+        (base32 "027w8fvi50ksl57q0a7kb5zvmq8jxaawnviib1jdqw0p3igvm1j4"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/jangler/readlike")
+    (synopsis "GNU Readline-like line editing module")
+    (description
+     "This Python module provides line editing functions similar to the default
+Emacs-style ones of GNU Readline.  Unlike the Python standard library's
+@code{readline} package, this one allows access to those capabilties in settings
+outside of a standard command-line interface.  It is especially well-suited to
+interfacing with Urwid, due to a shared syntax for describing key inputs.
+
+Currently, all stateless Readline commands are implemented.  Yanking and history
+are not supported.")
+    (license license:expat)))
+
+(define-public python2-readlike
+  (package-with-python2 python-readlike))
+
+(define-public python-reparser
+  (package
+    (name "python-reparser")
+    (version "1.4.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "ReParser" version))
+       (sha256
+        (base32 "0nniqb69xr0fv7ydlmrr877wyyjb61nlayka7xr08vlxl9caz776"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/xmikos/reparser")
+    (synopsis "Simple lexer/parser for inline markup based on regular expressions")
+    (description
+     "This Python library provides a simple lexer/parser for inline markup based
+on regular expressions.")
+    (license license:expat)))
+
+(define-public python2-reparser
+  (let ((reparser (package-with-python2
+                   (strip-python2-variant python-reparser))))
+    (package (inherit reparser)
+             (propagated-inputs
+              `(("python2-enum34" ,python2-enum34)
+                ,@(package-propagated-inputs reparser))))))
+
+(define-public python-precis-i18n
+  (package
+    (name "python-precis-i18n")
+    (version "1.0.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "precis_i18n" version))
+       (sha256
+        (base32
+         "0gjhvwd8aifx94rl1ag08vlmndyx2q3fkyqb0c4i46x3p2bc2yi2"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/byllyfish/precis_i18n")
+    (synopsis "Implementation of the PRECIS framework")
+    (description
+     "This module implements the PRECIS Framework as described in RFC 8264,
+RFC 8265 and RFC 8266.")
+    (license license:expat)))
+
+(define-public python-absl-py
+  (package
+    (name "python-absl-py")
+    (version "0.6.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "absl-py" version))
+       (sha256
+        (base32
+         "1mp9lk0b2qa37b7y6ak4lvf6ifw2ylyy6bkf9ik77md3j4xrwlc7"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (home-page "https://github.com/abseil/abseil-py")
+    (synopsis "Abseil Python common libraries")
+    (description
+     "This package provides the Abseil Python Common Libraries, a collection
+of Python libraries for building Python applications.")
+    (license license:asl2.0)))
+
+(define-public python-astor
+  (package
+    (name "python-astor")
+    (version "0.7.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "astor" version))
+       (sha256
+        (base32
+         "13gv6f2xz9i564byp21gcpc0l3w4cs23k1wbcam8kky2ls3hvhwm"))))
+    (build-system python-build-system)
+    ;; FIXME: There are two errors and two test failures.
+    (arguments `(#:tests? #f))
+    (home-page "https://github.com/berkerpeksag/astor")
+    (synopsis "Read/rewrite/write Python ASTs")
+    (description "Astor is designed to allow easy manipulation of Python
+source via the AST.")
+    (license license:bsd-3)))
+
+(define-public python-grpcio
+  (package
+    (name "python-grpcio")
+    (version "1.17.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "grpcio" version))
+       (sha256
+        (base32
+         "0qb9y6j83nxa6d4kc60i8yfgdm7a8ms7b54kncjzf5y7nsxp8rzx"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-six" ,python-six)))
+    (home-page "https://grpc.io")
+    (synopsis "HTTP/2-based RPC framework")
+    (description "This package provides a Python library for communicating
+with the HTTP/2-based RPC framework gRPC.")
+    (license license:asl2.0)))
+
+(define-public python-astunparse
+  (package
+    (name "python-astunparse")
+    (version "1.6.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "astunparse" version))
+       (sha256
+        (base32
+         "1jhidwyrqn17avqh9xnnm3wd7q7aahaq009cba67g86y6gxicyyj"))))
+    (build-system python-build-system)
+    (arguments '(#:tests? #f)) ; there are none
+    (propagated-inputs
+     `(("python-six" ,python-six)
+       ("python-wheel" ,python-wheel)))
+    (home-page "https://github.com/simonpercivall/astunparse")
+    (synopsis "AST unparser for Python")
+    (description "This package provides an AST unparser for Python.  It is a
+factored out version of @code{unparse} found in the Python source
+distribution.")
+    (license license:bsd-3)))
+
+(define-public python-gast
+  (package
+    (name "python-gast")
+    (version "0.2.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "gast" version))
+       (sha256
+        (base32
+         "0c296xm1vz9x4w4inmdl0k8mnc0i9arw94si2i7pglpc461r0s3h"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-astunparse" ,python-astunparse)))
+    (home-page "https://pypi.org/project/gast/")
+    (synopsis "Generic Python AST that abstracts the underlying Python version")
+    (description
+     "GAST provides a compatibility layer between the AST of various Python
+versions, as produced by @code{ast.parse} from the standard @code{ast}
+module.")
+    (license license:bsd-3)))
+
+(define-public python-wikidata
+  (package
+    (name "python-wikidata")
+    (version "0.6.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "Wikidata" version))
+       (sha256
+        (base32
+         "08nlnydddfp1jj0cdmshvld1irzngbp3dij928wqsg9ziklm6mw9"))))
+    (build-system python-build-system)
+    (propagated-inputs
+     `(("python-babel" ,python-babel)))
+    (home-page "https://github.com/dahlia/wikidata")
+    (synopsis "Wikidata client library")
+    (description
+     "This package provides a Python interface to
+@url{https://www.wikidata.org/, Wikidata}.")
+    (properties '((upstream-name . "Wikidata")))
+    (license license:gpl3+)))
+
+(define-public python-doctest-ignore-unicode
+  (package
+    (name "python-doctest-ignore-unicode")
+    (version "0.1.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "doctest-ignore-unicode" version))
+       (sha256
+        (base32
+         "1m9aa4qnyj21lbq4sbvmv1vcz7zksss4rz37ddf2hxv4hk8b547w"))))
+    (build-system python-build-system)
+    (native-inputs
+     `(("python-nose" ,python-nose)))
+    (home-page "https://github.com/gnublade/doctest-ignore-unicode")
+    (synopsis "Ignore Unicode literal prefixes in doctests")
+    (description
+     "This package adds support for a flag to ignore Unicode literal prefixes
+in doctests.")
+    (license license:asl2.0)))
+
+(define-public python-attr
+  (package
+    (name "python-attr")
+    (version "0.3.1")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (pypi-uri "attr" version))
+       (sha256
+        (base32
+         "0pbpskvxp5hzdvcaf766ljwpckshir8sf7z6jqji6zyib20594ch"))))
+    (build-system python-build-system)
+    (home-page "https://github.com/denis-ryzhkov/attr")
+    (synopsis "Decorator for attributes of target function or class")
+    (description "Simple decorator to set attributes of target function or
+class in a @acronym{DRY, Don't Repeat Yourself} way.")
+    (license license:expat)))