Re: how to fix TypeError: expected string or bytes-like object ?

[Felix Yan <felixonmars@archlinux.org>]

On 10/5/22 14:02, Bo YU wrote:
> ```
> vimer@dev:~/build/rfs/packages/test_dir$ sudo pip3 install  
> sphinxcontrib-ditaa
> Collecting sphinxcontrib-ditaa
>    Using cached sphinxcontrib-ditaa-1.0.1.tar.gz (7.5 kB)
>    Preparing metadata (setup.py) ... error
>    error: subprocess-exited-with-error
>
>    × python setup.py egg_info did not run successfully.
>    │ exit code: 1
>    ╰─> [30 lines of output]
>        Traceback (most recent call last):
>          File "<string>", line 2, in <module>
>          File "<pip-setuptools-caller>", line 34, in <module>
>          File 
> "/tmp/pip-install-c2wygkxs/sphinxcontrib-ditaa_10e1c64028af47e59b8fc5bf20b6901c/setup.py", line 8, in <module>
>            setup(
>          File "/usr/lib/python3/dist-packages/setuptools/__init__.py", 
> line 86, in setup
>            _install_setup_requires(attrs)
>          File "/usr/lib/python3/dist-packages/setuptools/__init__.py", 
> line 75, in _install_setup_requires
>            dist = MinimalDistribution(attrs)
>          File "/usr/lib/python3/dist-packages/setuptools/__init__.py", 
> line 57, in __init__
>            super().__init__(filtered)
>          File "/usr/lib/python3/dist-packages/setuptools/dist.py", line 
> 474, in __init__
>            for ep in 
> metadata.entry_points(group='distutils.setup_keywords'):
>          File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 
> 1009, in entry_points
>            return SelectableGroups.load(eps).select(**params)
>          File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 
> 459, in load
>            ordered = sorted(eps, key=by_group)
>          File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 
> 1006, in <genexpr>
>            eps = itertools.chain.from_iterable(
>          File "/usr/lib/python3.10/importlib/metadata/_itertools.py", 
> line 16, in unique_everseen
>            k = key(element)
>          File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 
> 941, in _normalized_name
>            return self._name_from_stem(stem) or super()._normalized_name
>          File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 
> 622, in _normalized_name
>            return Prepared.normalize(self.name)
>          File "/usr/lib/python3.10/importlib/metadata/__init__.py", line 
> 871, in normalize
>            return re.sub(r"[-_.]+", "-", name).lower().replace('-', '_')
>          File "/usr/lib/python3.10/re.py", line 209, in sub
>            return _compile(pattern, flags).sub(repl, string, count)
>        TypeError: expected string or bytes-like object
>        [end of output]
>
>    note: This error originates from a subprocess, and is likely not a 
> problem with pip.
> error: metadata-generation-failed
>
> × Encountered error while generating package metadata.
> ╰─> See above for output.
>
> ```

You are right. The traceback is indeed different but more similar to 
this one, probably: https://github.com/pypa/setuptools/issues/3273

I have tried to make an empty .dist-info dir and got the very similar 
result to yours.

The following command may help to locate the actual offending package:

strace -eopenat python -c "from importlib.metadata import entry_points; 
print(entry_points(group='sphinx.builders'))"

--
Regards,
Felix Yan

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