Everything is None on pip 9

[Tzu-ping Chung]

$ mkdir pip-shims-test
$ cd pip-shims-test/
$ pipenv install pip-shims "pip<10"
[snipped]

$ pipenv run python
>>> import pip_shims
>>> print(pip_shims.VcsSupport)
None
>>> import pip.vcs
>>> print(pip.vcs.VcsSupport)
<class 'pip.vcs.VcsSupport'>
>>>

[Tzu-ping Chung]

This seems to only happen if modutil is present.

[Dan Ryan]

If you import from pip_shims.shims?

[Tzu-ping Chung]

Doesn’t seem to make a difference.

[Siyuan Yan]

can confirm this happens on old pip

           ireq = pip_shims.shims.install_req_from_line(line)
           TypeError: 'NoneType' object is not callable