pipenv: AttributeError: 'NoneType' object has no attribute 'version_sort'

Windows 10, Python 3.8.3, pipenv 2020.6.2

I managed to solve this by typing in the full path to the python.exe:

pipenv install --python=“C:\Users\my_name\AppData\Local\Programs\Python\Python38\python.exe”

Viola! Virtual environment created.

this issue still persists on win10 with python 3.8.3 and pipenv 2020.6.2

DVCL643@10NB03610:~/workspace/python/mailswitch_security$ pipenv shell
Traceback (most recent call last):
  File "c:\users\dvcl643\appdata\local\programs\python\python38\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "c:\users\dvcl643\appdata\local\programs\python\python38\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\dvcl643\AppData\Local\Programs\Python\Python38\Scripts\pipenv.exe\__main__.py", line 9, in <module>
  File "C:\Users\dvcl643\AppData\Local\Programs\Python\Python38\Lib\site-packages\pipenv\vendor\click\core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "C:\Users\dvcl643\AppData\Local\Programs\Python\Python38\Lib\site-packages\pipenv\vendor\click\core.py", line 782, in main
    rv = self.invoke(ctx)
  File "C:\Users\dvcl643\AppData\Local\Programs\Python\Python38\Lib\site-packages\pipenv\vendor\click\core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "C:\Users\dvcl643\AppData\Local\Programs\Python\Python38\Lib\site-packages\pipenv\vendor\click\core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "C:\Users\dvcl643\AppData\Local\Programs\Python\Python38\Lib\site-packages\pipenv\vendor\click\core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "C:\Users\dvcl643\AppData\Local\Programs\Python\Python38\Lib\site-packages\pipenv\vendor\click\decorators.py", line 73, in new_func
    return ctx.invoke(f, obj, *args, **kwargs)
  File "C:\Users\dvcl643\AppData\Local\Programs\Python\Python38\Lib\site-packages\pipenv\vendor\click\core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "c:\users\dvcl643\appdata\local\programs\python\python38\lib\site-packages\pipenv\cli\command.py", line 428, in shell
    do_shell(
  File "c:\users\dvcl643\appdata\local\programs\python\python38\lib\site-packages\pipenv\core.py", line 2363, in do_shell
    ensure_project(
  File "c:\users\dvcl643\appdata\local\programs\python\python38\lib\site-packages\pipenv\core.py", line 576, in ensure_project
    ensure_virtualenv(
  File "c:\users\dvcl643\appdata\local\programs\python\python38\lib\site-packages\pipenv\core.py", line 498, in ensure_virtualenv
    python = ensure_python(three=three, python=python)
  File "c:\users\dvcl643\appdata\local\programs\python\python38\lib\site-packages\pipenv\core.py", line 388, in ensure_python
    path_to_python = find_a_system_python(python)
  File "c:\users\dvcl643\appdata\local\programs\python\python38\lib\site-packages\pipenv\core.py", line 350, in find_a_system_python
    return next(iter(finder.find_all_python_versions()), None)
  File "c:\users\dvcl643\appdata\local\programs\python\python38\lib\site-packages\pipenv\vendor\pythonfinder\pythonfinder.py", line 328, in find_all_python_ve
rsions
    path_list = sorted(versions, key=version_sort, reverse=True)
AttributeError: 'NoneType' object has no attribute 'version_sort'

I have solved this by reverting to

pip install pipenv==2018.11.26

run it with “–three”

pipenv --three

Running pip3 install pipenv==2018.11.26 in terminal solved the below issue for me

AttributeError: 'NoneType' object has no attribute 'url'

run it with “–three”

pipenv --three

Thanks JadJabbour This worked for me ex: pipenv --three install django~=3.1.0

Still getting the same error with full path to python.exe.

Windows 10, Build 20161 Miniconda Python 3.7.4 pipenv 2020.6.2

pipenv install --python="C:\Users\Han\Miniconda3\python.exe"

Pipfile:

[[source]]
name = "pypi"
url = "https://pypi.org/simple"
verify_ssl = true

[dev-packages]
pytest = "*"
v = {editable = true,version = "*"}

[packages]
numpy = "==1.19"
tensorflow = "==2.2"
pillow = "*"
requests = "*"
nltk = "*"
matplotlib = "*"

[requires]
python_version = "3.7"

Workaround for pipenv 2021.5.29: specify your version of python when running pipenv for the first time:

pipenv --python 3.9.5 pipenv install

If you don’t know your version of python: python --version

All previous versions of pipenv appear to run as expected.

I am also seeing this error on OSX 10.14.6, with pipenv 2020.8.13:

Pipfile:

[requires]
python_version = "3.7.6"

pipenv install --dev --python $(pyenv root)/versions/3.7.6/bin/python

Finally, AttributeError: 'NoneType' object has no attribute 'url'

I went in to “pythonfinder.py” where the error occurs, and commented out the sorting of the python version list. Felt comfortable doing it because of the comment.

So from: # This list has already been mostly sorted on windows, we don't need to reverse it again path_list = sorted(versions, key=version_sort, reverse=True)

to: # This list has already been mostly sorted on windows, we don't need to reverse it again # path_list = sorted(versions, key=version_sort, reverse=True) path_list = versions

This solved it for me.

After implementing above solution, I’m getting the Value Error “Unable to find t64.exe in package distlib”(despite the existence of t64.exe)