How to install sklearn2pmml correctly in python? - python-3.x

Question

I have been trying to install sklearn2pmml using pip
pip install --upgrade sklearn2pmml==0.83.0
pip install --upgrade sklearn2pmml
pip install sklearn2pmml
python3 -m pip install sklearn2pmml
I have tried all variations to pip install command. But I am still getting the same error (shown below)
pip install --upgrade sklearn2pmml==0.83.0
WARNING: pip is being invoked by an old script wrapper. This will fail in a future version of pip.
Please see https://github.com/pypa/pip/issues/5599 for advice on fixing the underlying issue.
To avoid this problem you can invoke Python with '-m pip' instead of running pip directly.
Defaulting to user installation because normal site-packages is not writeable
Collecting sklearn2pmml==0.83.0
Using cached sklearn2pmml-0.83.0.tar.gz (6.3 MB)
Preparing metadata (setup.py) ... error
error: subprocess-exited-with-error
× python setup.py egg_info did not run successfully.
│ exit code: 1
╰─> [26 lines of output]
Traceback (most recent call last):
File "<string>", line 36, in <module>
File "<pip-setuptools-caller>", line 34, in <module>
File "/tmp/pip-install-4rirpdmx/sklearn2pmml_8f0847b696dd4b058e058b7e1e18cdda/setup.py", line 44, in <module>
"sklearn-pandas>=0.0.10"
File "/home/notebook/.local/lib/python3.7/site-packages/setuptools/_distutils/core.py", line 147, in setup
_setup_distribution = dist = klass(attrs)
File "/home/notebook/.local/lib/python3.7/site-packages/setuptools/dist.py", line 474, in __init__
for ep in metadata.entry_points(group='distutils.setup_keywords'):
File "/home/notebook/.local/lib/python3.7/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 999, in entry_points
return SelectableGroups.load(eps).select(**params)
File "/home/notebook/.local/lib/python3.7/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 449, in load
ordered = sorted(eps, key=by_group)
File "/home/notebook/.local/lib/python3.7/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 997, in <genexpr>
dist.entry_points for dist in unique(distributions())
File "/home/notebook/.local/lib/python3.7/site-packages/setuptools/_vendor/importlib_metadata/_itertools.py", line 16, in unique_everseen
k = key(element)
File "/home/notebook/.local/lib/python3.7/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 931, in _normalized_name
return self._name_from_stem(stem) or super()._normalized_name
File "/home/notebook/.local/lib/python3.7/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 600, in _normalized_name
return Prepared.normalize(self.name)
File "/home/notebook/.local/lib/python3.7/site-packages/setuptools/_vendor/importlib_metadata/__init__.py", line 855, in normalize
return re.sub(r"[-_.]+", "-", name).lower().replace('-', '_')
File "/opt/pyenv/versions/3.7.4/lib/python3.7/re.py", line 192, 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.
note: This is an issue with the package mentioned above, not pip.
hint: See above for details.
I have tried installing several versions. I have tried uninstalling py4j and then running it. Installing py4j's different version and the installing it.
Not sure why I am getting this error.
Has someone faced this issue before?
I have tried installing different versions of the package. I got the same error.

Answer 1

I was able to fix this issue by updating
/home/notebook/.local/lib/python3.7/site-packages/setuptools/_vendor/importlib_metadata/init.py
file. I replaced
return re.sub(r"[-_.]+", "-", name).lower().replace('-', '_')
with
return re.sub(r"[-_.]+", "-", name).lower().replace('-', '_') if name else ''
I am not sure why but None was getting passed to normalize function.