[Python-modules-team] Bug#915636: python3-virtualenv: incompatible with python3-pip 18.1 - AttributeError pip.main - please upgrade to 16.1.0

[Philipp Hahn]

Package: python3-virtualenv
Version: 15.1.0+ds-1.1
Severity: important

Dear Maintainer,

mybe I miss the obvious, but running "virtualenv" no longer works for me:

# virtualenv -p /usr/bin/python3.6 ./py36 -v
...
> Traceback (most recent call last):
>   File "/usr/lib/python3/dist-packages/virtualenv.py", line 2375, in <module>
>     main()
>   File "/usr/lib/python3/dist-packages/virtualenv.py", line 724, in main
>     symlink=options.symlink)
>   File "/usr/lib/python3/dist-packages/virtualenv.py", line 992, in create_environment
>     download=download,
>   File "/usr/lib/python3/dist-packages/virtualenv.py", line 922, in install_wheel
>     call_subprocess(cmd, show_stdout=False, extra_env=env, stdin=SCRIPT)
>   File "/usr/lib/python3/dist-packages/virtualenv.py", line 817, in call_subprocess
>     % (cmd_desc, proc.returncode))
> OSError: Command /home/phahn/py36/bin/python3.6 - setuptools pkg_resources pip wheel failed with error code 1


/usr/lib/python3/dist-packages/virtualenv.py:876
>     SCRIPT = textwrap.dedent("""
...
>         import pip
...
>             sys.exit(pip.main(args))


>>> import pip
>>> pip.__version__
'18.1'
>>> pip.main
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: module 'pip' has no attribute 'main'

According to <https://github.com/pypa/pip/issues/5221> pip.main is an internal
details and should not be called as it is not part of the API.

If I add '--no-wheel --no-pip  --no-setuptools' to the command line, the
command at least does not exit with an error.

According to <https://pypi.org/project/virtualenv/> version 16.1.0 fixes it:
> upgrade pip from 10.0.1 to 18.1

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.17.0-3-amd64 (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages python3-virtualenv depends on:
ii  python-pip-whl         18.1-2
ii  python3                3.7.1-2
ii  python3-distutils      3.7.1-1
ii  python3-pkg-resources  40.6.2-1

python3-virtualenv recommends no packages.

python3-virtualenv suggests no packages.

-- no debconf information