Python 3.12 requires dependency setuptools

[cclauss]

% python3.12 -m pip install pipx
% pipx install setuptools-py2cfg
% setuptools-py2cfg

Traceback (most recent call last):
File "/Users/cclauss/.local/bin/setuptools-py2cfg", line 5, in
from setuptools_py2cfg import main
File "/Users/cclauss/.local/pipx/venvs/setuptools-py2cfg/lib/python3.12/site-packages/setuptools_py2cfg.py", line 7, in
import setuptools
ModuleNotFoundError: No module named 'setuptools'

---

Fix: pipx inject setuptools-py2cfg setuptools

---

https://docs.python.org/3.12/whatsnew/3.12.html

gh-95299: Do not pre-install setuptools in virtual environments created with venv. This means that distutils, setuptools, pkg_resources, and easy_install will no longer available by default; to access these run pip install setuptools in the activated virtual environment.

Also, the following might be a problem for some setups that use Cython.

• from collections.abc import MutableMapping for Python >= v3.10 mo22/buildconfig#2

[cclauss]

Mock(spec) --> Mock(autospec)

setuptools-py2cfg/setuptools_py2cfg.py

Line 44 in 7299f1c

sys.modules['setuptools'] = Mock(spec=setuptools)

• https://nedbatchelder.com/blog/202202/why_your_mock_still_doesnt_work.html