python -m pipenv.help broken in 11.10.0

[murrple-1]

See title. Erroring with TypeError: format() argument after ** must be a mapping, not NoneType.

---

Expected result

Help info should be output successfully

Actual result

Help info only partially succeeds, before erroring. Example output:

$ python -m pipenv.help
<details><summary>$ python -m pipenv.help output</summary>
Pipenv version: `'11.10.0'`
Pipenv location: `'/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv'`
Python location: `'/home/travis/virtualenv/python3.6.3/bin/python'`
Other Python installations in `PATH`:
  - `2.7`: `/opt/pyenv/shims/python2.7`
  - `2.7`: `/opt/pyenv/shims/python2.7`
  - `2.7`: `/usr/bin/python2.7`
  - `3.4`: `/usr/bin/python3.4m`
  - `3.4`: `/usr/bin/python3.4`
Traceback (most recent call last):
  File "/opt/python/3.6.3/lib/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/opt/python/3.6.3/lib/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/help.py", line 89, in <module>
    main()
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/help.py", line 24, in main
    found = find_python_in_path(python_v)
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/core.py", line 355, in find_python_in_path
    version = python_version(p)
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/utils.py", line 218, in python_version
    return u'{major}.{minor}.{micro}'.format(**version)
TypeError: format() argument after ** must be a mapping, not NoneType
The command "python -m pipenv.help" exited with 1.

Steps to replicate

Please see minimum-reproducible code at this repo, with this Travis-CI.

[uranusjr]

I broke things again 🤦‍♂️ So sorry about that.

[uranusjr]

I wonder what causes this on Travis though. One of python, python2, python3, and py commands returned something unexpected when passed the --version flag.

[jacebrowning]

I'm seeing something similar on Travis CI that just started with 11.10.0:

pipenv install --dev
Creating a virtualenv for this project…
Using /opt/pyenv/versions/3.6/bin/python3.6m (3.6.3) to create virtualenv…
Running virtualenv with interpreter /opt/pyenv/versions/3.6/bin/python3.6m
Using base prefix '/opt/pyenv/versions/3.6'
New python executable in /home/travis/.local/share/virtualenvs/project_demo-bCjNwlW-/bin/python3.6m
Also creating executable in /home/travis/.local/share/virtualenvs/project_demo-bCjNwlW-/bin/python
Installing setuptools, pip, wheel...done.
Virtualenv location: /home/travis/build/zapier/project-template/demo/project_demo/.venv
Traceback (most recent call last):
  File "/home/travis/virtualenv/python3.6.3/bin/pipenv", line 11, in <module>
    sys.exit(cli())
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 1066, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/cli.py", line 366, in install
    selective_upgrade=selective_upgrade,
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/core.py", line 1730, in do_install
    skip_requirements=skip_requirements,
  File "/home/travis/virtualenv/python3.6.3/lib/python3.6/site-packages/pipenv/core.py", line 620, in ensure_project
    crayons.green(shorten_path(path_to_python)),
TypeError: __str__ returned non-string (type NoneType)

Let me know if this should be a separate issue.

[uranusjr]

I hate pyenv shims 🤦‍♂️ It is slightly different, but #1971 should fix it as well.