pip 18.1: pipenv graph results in ImportError: cannot import name 'get_installed_distributions'

Issue description

When you install pip 18.1 (not reproducible with pip 18.0 and below), pipenv graph fails with ImportError.

Expected result

I expect pipenv graph to work with no exceptions.

Actual result

$ pipenv graph
Traceback (most recent call last):
  File ".../.local/lib/python3.6/site-packages/pipenv/vendor/pipdeptree.py", line 17, in <module>
    from pip._internal import get_installed_distributions
ImportError: cannot import name 'get_installed_distributions'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File ".../.local/bin/pipenv", line 11, in <module>
    sys.exit(cli())
  File ".../.local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File ".../.local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File ".../.local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File ".../.local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File ".../.local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File ".../.local/lib/python3.6/site-packages/pipenv/cli.py", line 922, in graph
    do_graph(bare=bare, json=json, json_tree=json_tree, reverse=reverse)
  File ".../.local/lib/python3.6/site-packages/pipenv/core.py", line 2363, in do_graph
    import pipdeptree
  File ".../.local/lib/python3.6/site-packages/pipenv/vendor/pipdeptree.py", line 20, in <module>
    from pip import get_installed_distributions, FrozenRequirement
ImportError: cannot import name 'get_installed_distributions'

[florisla]

This is caused py pipenv not being compatible to the latest release of pip. #2924 is another error cause by the same issue.

The workaround that works there is valid for this issue downgrade your pip to a version prior to 18.1.

I’m currently using

python3 -m pip install pip==10.0.1
python3 -m pip install pipenv==2018.5.18

Once #2924 is fixed and released, you can upgrade again to the latest and greatest.

python3 -m pip install --upgrade pip
python3 -m pip install --upgrade pipenv

[joshnewlinatclearobject]

I’m getting a similar issue to @thernstig above. Just updated this morning.

$ python --version
Python 3.6.5
$ pipenv --version
pipenv, version 2018.10.9
$ pip --version
pip 18.1 from /usr/local/Cellar/pipenv/2018.10.9/libexec/lib/python3.7/site-packages/pip (python 3.7)

Error below:

$ pipenv graph

ERROR:  Traceback (most recent call last):
  File "/usr/local/Cellar/pipenv/2018.10.9/libexec/lib/python3.7/site-packages/pipenv/vendor/pipdeptree.py", line 16, in <module>
    from pipenv.vendor.pip_shims import get_installed_distributions, FrozenRequirement
ModuleNotFoundError: No module named 'pipenv'