pipenv --three generates an error on Mac OS X

I had to manually set the python variable to the correct place in the cli.py file because it was, somehow, getting the wrong path.

which('python') was returning /bin/python/ instead of the correct path.

This is the stack trace:

Virtualenv location:
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.6/bin/pipenv", line 11, in <module>
    sys.exit(cli())
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 1043, in invoke
    return Command.invoke(self, ctx)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pipenv/vendor/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pipenv/cli.py", line 1163, in cli
    ensure_project(three=three, python=python)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/pipenv/cli.py", line 382, in ensure_project
    if project.required_python_version not in python_version(path_to_python):
TypeError: argument of type 'NoneType' is not iterable

[jussihuotari]

Not working for me on MacOs + Brew-installed python3. However, the error went away after setting the locale so I assume this may have something to do with https://bugs.python.org/issue18378.

export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8

Before the above mentioned exports:

$ which pip3
/usr/local/bin/pip3
$ pip3 install pipenv
Collecting pipenv
  ...
  ...
  ...
Successfully installed pipenv-7.3.7
$ pipenv --three
Warning: the environment variable LANG is not set!
We recommend setting this in ~/.profile (or equivalent) for proper expected behavior.
Creating a virtualenv for this project…
Using /usr/local/bin/python3 to create virtualenv…
...
...
Virtualenv location: 
Creating a Pipfile for this project…
Traceback (most recent call last):
  File "/usr/local/bin/pipenv", line 11, in <module>
    sys.exit(cli())
  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 722, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 697, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 1043, in invoke
    return Command.invoke(self, ctx)
  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 895, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/core.py", line 535, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/pipenv/vendor/click/decorators.py", line 17, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/usr/local/lib/python3.6/site-packages/pipenv/cli.py", line 1422, in cli
    ensure_project(three=three, python=python, warn=True)
  File "/usr/local/lib/python3.6/site-packages/pipenv/cli.py", line 549, in ensure_project
    ensure_pipfile(validate=validate)
  File "/usr/local/lib/python3.6/site-packages/pipenv/cli.py", line 293, in ensure_pipfile
    project.create_pipfile(python=python)
  File "/usr/local/lib/python3.6/site-packages/pipenv/project.py", line 328, in create_pipfile
    data[u'requires'] = {'python_version': python_version(python)[:len('2.7')]}
TypeError: 'NoneType' object is not subscriptable

[kennethreitz]

Yeah

export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8

are required.