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Sync with importlib_metadata for Python 3.16

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Avaliação

Dificuldade
4/5
Tempo estimado
3-5 dias
Facilidade para iniciantes
48/100
Tipo de issue
Funcionalidade
Clareza
Razoavelmente clara
Status de atividade
Ativa
Stack de tecnologia
python
Domínio
backend, tooling

Direção de pesquisa

Read the upstream importlib_metadata 9.0.1 and 9.1.0 changelogs linked in the issue, then compare their changes with Lib/importlib/metadata and its tests. Check each listed behavior and cleanup against the current Python 3.16 implementation; done when the applicable upstream changes are reflected and the relevant tests pass. The issue names _typing.py but does not identify specific test files.

Escrita pelo modelo de indexação a partir do texto da issue.

Descrição

stdlib topic-importlib type-feature

Tracking issue for applying importlib_metadata changes to importlib.metadata in 3.16, continuing the pattern of #132947 (3.15) and #117089 (3.13).

This covers importlib_metadata 9.0.1 and 9.1.0:

  • Prefer the greater metadata directory when a path supplies more than one. Children are now considered in reverse lexicographic order, so stale metadata left behind by an interrupted or unclean upgrade no longer shadows the version in use (#100666).
  • Identify the distribution when a required metadata field is missing. Distribution.name and .version now raise a KeyError naming both the field and the distribution, and PathDistribution renders itself as its metadata path.
  • Defer EntryPoint.value validation until use. Construction no longer validates, so one malformed entry point no longer prevents entry points in other groups from being selected (python/importlib_metadata#523).
  • importlib.metadata.diagnose no longer crashes on a metadata directory with no metadata file, or whose metadata declares no name; such distributions are reported by their location (python/importlib_metadata#548).
  • SimplePath.joinpath and SimplePath.__truediv__ take other positional-only, so pathlib.Path satisfies the protocol under type checkers that compare parameter names (python/importlib_metadata#542).

Two further items that are cleanups rather than behavior changes:

  • Prepared.normalize returns to the re.sub implementation. The hand-rolled version from #143658 was reverted upstream, so keeping it here would be fresh drift.
  • Lib/importlib/metadata/_typing.py is removed along with its import. Its only export, md_none, lost its last call site when Distribution.metadata began raising MetadataNotFound (#143387), but the import line survived the merge that landed that change, leaving an unused module imported by nothing.
Linked PRs
  • gh-160387
Linguagem predominante
Python
Estrelas
77.7k
Forks
38.3k
Merge médio
13h 43min
PRs com merge (30d)
704

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