[BUG] Incompatibility with Python 3.13: AttributeError for 'pkgutil.ImpImporter'

[EsetaL10]

setuptools version

setuptools 75.8.0

Python version

python 3.13

OS

windows 10

Additional environment information

Description

When using Python 3.13 with setuptools, numpy, and librosa, I encountered the following error:
AttributeError: module 'pkgutil' has no attribute 'ImpImporter'. Did you mean: 'zipimporter'?

This occurs because Python 3.13 has removed ImpImporter, but libraries like setuptools (even recent versions) still rely on it. This causes installation failures for numpy downgrades and breaks compatibility with librosa, pretty_midi, and music21.

Expected behavior

Libraries should install and import without errors.

How to Reproduce

1. Install Python 3.13.
2. Run: pip install librosa numpy==1.23.5 scipy matplotlib mido pretty_midi music21 mir_eval
3. Import the libraries in Python: import setuptools, librosa, numpy

Output

The process fails with the pkgutil.ImpImporter error.

[Avasam]

Could you post the full error with complete trace ?
setuptools doesn't use pkgutil directly outside of pkg_resources. And all ImpImporter accesses are protected by if hasattr(pkgutil, 'ImpImporter').

As a guess, it's possible the error comes from an outdated dependency of setuptools that you may have laying around.
Can you try pip install --upgrade setuptools[core] ? as per https://setuptools.pypa.io/en/latest/userguide/quickstart.html