ValueError: Not a valid python version

[Mortuie]

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Well I can't even run pipenv --support it gives me this error

   return f(get_current_context(), *args, **kwargs)
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/cli/command.py", line 142, in cli                                                                                
    get_pipenv_diagnostics()
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/help.py", line 33, in get_pipenv_diagnostics                                                                     
    python_paths = finder.find_all_python_versions()
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/pythonfinder.py", line 136, in find_all_python_versions                                      
    major=major, minor=minor, patch=patch, pre=pre, dev=dev, arch=arch, name=name
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/path.py", line 328, in find_all_python_versions                                       
    values = list(self.get_pythons(sub_finder))
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/path.py", line 279, in get_pythons                                                    
    reverse=True
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/path.py", line 277, in <genexpr>                                                      
    (p for p in self._filter_paths(finder) if p.is_python),
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/path.py", line 264, in <genexpr>                                                      
    pth for pth in unnest(finder(p) for p in self.path_entries if p is not None)
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/utils.py", line 138, in unnest                                                               
    for el in target:
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/path.py", line 264, in <genexpr>                                                      
    pth for pth in unnest(finder(p) for p in self.path_entries if p is not None)
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/mixins.py", line 76, in find_all_python_versions                                      
    path_filter = filter(None, (sub_finder(p) for p in self.children.values()))
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/cached_property.py", line 35, in __get__                                                                  
    value = obj.__dict__[self.func.__name__] = self.func(obj)
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/path.py", line 494, in children                                                       
    for child_key, child_val in self._gen_children():
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/path.py", line 487, in _gen_children                                                  
    yield (child.as_posix(), PathEntry.create(path=child, **pass_args))
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/path.py", line 567, in create                                                         
    _new = cls(**creation_args)
  File "<attrs generated init 1a0d15d2d89843b0eea5f1da4750a4c34f8387c7>", line 16, in __init__
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/path.py", line 510, in get_py_version                                                 
    py_version = PythonVersion.from_path(path=self, name=self.name)
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/python.py", line 418, in from_path                                                    
    instance_dict = cls.parse(py_version.strip())
  File "/home/leon/.pyenv/versions/3.6.7/lib/python3.6/site-packages/pipenv/vendor/pythonfinder/models/python.py", line 366, in parse                                                        
    raise ValueError("Not a valid python version: %r" % version)
ValueError: Not a valid python version: <LegacyVersion('2.7.15+')>

I'm using pyenv and pipenv and they don't seem to be playing nice, anyone seen an error like this before ?

[duplicate-issues]

Hey @Mortuie,

We did a quick check and this issue looks very darn similar to

• #3240 - Can't uninstall editable packages even explicitly given to `uninstall` command
• #3239 - 2018.11.14 regression: `pipenv lock -r > ...` creates corrupted requirements file
• #3238 - 2018.11.14 regression: support for editables within an src dir broken

This could be a coincidence, but if any of these issues solves your problem then I did a good job 😄

If not, the maintainers will get to this issue shortly.

Cheers,
Your Friendly Neighborhood ProBot

[frostming]

Similar and potential duplicated issues:

#3208
#3232

BTW, the bot seems to give nothing but 3 most recent issues.

[Mortuie]

@frostming I have installed on linux using the update-vendor branch and it doesn't fix the error, the error still persists...

[mystor]

Running into the same issue here (Ubuntu 18.10), so I did a quick poke-around with pdb.

It seems as though the /usr/bin/python2.7 binary on 18.10 has made the odd decision to report its version as '2.7.15+'. This trips up the vendored packaging module's version.parse method, generating a LegacyVersion, as it is not expecting a + character.

The invalid version string then causes an exception to be raised by pythonfinder, which kills the pipenv process.

This feels to me like a mistake made while packaging this version of python2.7 in Ubuntu 18.10, but it might make sense to add a workaround for it in pipenv either way, as Ubuntu is a fairly popular distro.

I'm guessing the "correct" thing to do here would be for pythonfinder to not throw an error in this situation, instead ignoring the oddly-versioned python executable, but that might be a bad experience for Ubuntu users due to the broken version string, so it might also make sense to add a special-case.

[techalchemy]

We understand the issue in full, it's being tracked in pythonfinder already -- sorry for the trouble and thanks for the report

[techalchemy]

This was fixed in #3254 -- sorry for the trouble