gnu: Add python2-xdo. * gnu/packages/python.scm (python2-xdo): New variable.
gnu: python-matplotlib: Define 'python2-variant'. * gnu/packages/python.scm (python2-numpy): Take the result of 'package-with-python2' directly. (python2-scipy): Likewise. (python-matplotlib)[properties]: New field. (python2-matplotlib): Call 'strip-python2-variant'.
gnu: python-cython: Define 'python2-variant'. * gnu/packages/python.scm (python-cython)[properties]: New field. (python2-cython): Use 'strip-python2-variant'.
gnu: python2-pysqlite: Update to 2.8.1. * gnu/packages/python.scm (python2-pysqlite): Update to 2.8.1. [source]: Change to `pypi uri` syntax. [home-page]: Update to new homepage.
gnu: python2-backport-ssl-match-hostname: Update to 3.5.0.1. * gnu/packages/python.scm (python2-backport-ssl-match-hostname): Update to 3.5.0.1. [arguments]: Skip tests. [synopsis]: Update for python version 3.5.x.
gnu: python-cryptography: Update to 1.2.2. * gnu/packages/python.scm (python-cryptography): Update to 1.2.2. [source]: Change to `pypi uri` syntax. [native-inputs]: Add python-pyasn1, python-pyasn1-modules, python-hypothesis. (python2-cryptography)[propagated-inputs]: Add python2-backport-ssl-match-hostname
gnu: python-cryptography-vectors: Update to 1.2.2. * gnu/packages/python.scm (python-cryptography-vectors): Update to 1.2.2.
gnu: python-pip: Update to 8.0.2. * gnu/packages/python.scm (python-pip): Update to 8.0.2. [source]: Change to `pypi uri` syntax.
gnu: Add python-pytest-subtesthack. * gnu/packages/python.scm (python-pytest-subtesthack, python2-pytest-subtesthack): New variables.
gnu: Add python-hypothesis. * gnu/packages/python.scm (python-hypothesis, python2-hypothesis): New variables.
gnu: Add awscli. * gnu/packages/python.scm (awscli): New variable.
gnu: Add python-botocore. * gnu/packages/python.scm (python-botocore): New variable.
gnu: Add python-jmespath. * gnu/packages/python.scm (python-jmespath): New variable.
gnu: Add python-tox. * gnu/packages/python.scm (python-tox): New variable.
gnu: Add python-pluggy. * gnu/packages/python.scm (python-pluggy): New variable.
gnu: Add python-rsa. * gnu/packages/python.scm (python-rsa, python2-rsa): New variables.
gnu: Add python-colorama. * gnu/packages/python.scm (python-colorama, python2-colorama): New variables.
gnu: python-apsw: Update to 3.9.2-r1. * gnu/packages/python.scm (python-apsw): Update to 3.9.2-r1. [source]: Change to pypi uri syntax.
gnu: python-pillow: Update to 3.1.0. * gnu/packages/python.scm (python-pillow): Update to 3.1.0. [source]: Change to pypi uri syntax.
Merge branch 'core-updates'