[Avasam]

Summary of changes

Alternative dynamic mode: https://flake8-lazy.readthedocs.io/en/latest/cli/#dynamic-mode

Once pypa/distutils#414 is also merged, this will

• Close [BUG] SETUPTOOLS_USE_DISTUTILS=local makes any distutils import very slow #3585
• Close [BUG] Importing setuptools is slow and takes nearly half a second #3441

Autofixed by running

import glob, os, subprocess, sys
skip = {'tests', '_distutils', '_vendor', '_validate_pyproject'}
files = [f for f in glob.glob('setuptools/**/*.py', recursive=True) if not skip & set(f.split(os.sep))]
subprocess.check_call([sys.executable, '-m', 'flake8_lazy', *files, '--apply=set', '--strict-typing'])

Note: Merging #5222 first should reduce import reification related errors found by test.

Pull Request Checklist

• Changes have tests
• News fragment added in newsfragments/.
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[Avasam]

For tracking:

• Support __lazy_modules__ in lazy import rules astral-sh/ruff#25170
• Support and lints for lazy imports in Python 3.15+ astral-sh/ruff#21305
• lazy-import-mismatch - use __lazy_modules__ when targeting python <3.15 astral-sh/ruff#29175
• Support flake8-lazy style relative import in __lazy_modules__ astral-sh/ruff#28866