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Document packages_distributions metadata fallback by aryansk · Pull Request #544 · python/importlib_metadata · GitHub

Document packages_distributions metadata fallback - #544

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aryansk wants to merge 1 commit into

python:mainfrom

aryansk:codex/issue-526-top-level-metadata-docs

aryansk commented Aug 6, 2026

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Summary

Document how packages_distributions() uses the legacy top_level.txt metadata when present and falls back to installed-file inference.
Explain why build backends are not required to provide top_level.txt and why mappings can be incomplete.
Add the required release news fragment.

Fixes #526

Testing

uv run --project . --python /opt/homebrew/bin/python3.14 --extra test pytest -q tests/test_api.py — 37 passed, 39 subtests passed
uv run --project . --extra doc python -m sphinx -W --keep-going docs /tmp/codex-oss-next5.2ZwarK/importlib-docs-build — passed
git diff --check

Document packages_distributions metadata fallback

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