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Python 3.12: ModuleNotFoundError: No module named 'setuptools' #1640
Description
Activity
This happens because, while the
setuptoolsbuild backend remains supported including for projects like this one withsetup.pyfiles containing nontrivial logic, runningsetup.pydirectly is deprecated and, starting in Python 3.12, Python virtual (and global) environments no longer automatically have thesetuptoolspackage. See theensurepipitem in the list of removals in 3.12.The
test_installationtest runspython setup.py install. The solution is to usepip install .instead, orpip install -e .when an editable install is desired (intest_installation, theREADME.md, and elsewhere).I've opened #1654, which includes a fix for this issue.
The Python 3.12 release candidate is out! 🚀
See also https://dev.to/hugovk/help-test-python-312-beta-1508/
Python 3.12.0 final will be released in one month: https://peps.python.org/pep-0693/
However, when adding 3.12 to the CI like hugovk@427164b, it fails with:
―――――――――――――――――――――― TestInstallation.test_installation ―――――――――――――――――――――― self = <test.test_installation.TestInstallation testMethod=test_installation> rw_dir = '/tmp/test_installationo1a7a3rg' @with_rw_directory def test_installation(self, rw_dir): self.setUp_venv(rw_dir) result = subprocess.run( [self.pip, "install", "-r", "requirements.txt"], stdout=subprocess.PIPE, cwd=self.sources, ) self.assertEqual( 0, result.returncode, msg=result.stderr or result.stdout or "Can't install requirements", ) result = subprocess.run( [self.python, "setup.py", "install"], stdout=subprocess.PIPE, cwd=self.sources, ) > self.assertEqual( 0, result.returncode, msg=result.stderr or result.stdout or "Can't build - setup.py failed", ) E AssertionError: 0 != 1 : Can't build - setup.py failed test/test_installation.py:39: AssertionError ----------------------------- Captured stderr call ----------------------------- Traceback (most recent call last): File "/home/runner/work/GitPython/GitPython/setup.py", line 2, in <module> from setuptools import setup, find_packages ModuleNotFoundError: No module named 'setuptools'