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gh-143387: Raise an exception instead of returning None when metadata file is missing. #146234

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jaraco merged 2 commits into from
Mar 23, 2026
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gh-143387: Raise an exception instead of returning None when metadata file is missing. #146234

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Raise an exception instead of returning None when metadata file is mi…
jaraco Mar 20, 2026
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jaraco Mar 20, 2026
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jaraco committed Mar 20, 2026
commit 8b81efd752fc6741a4627b182c9c61e1366ba7a3
7 changes: 7 additions & 0 deletions Misc/NEWS.d/next/Library/2026-03-20-16-17-31.gh-issue-143387.9Waopa.rst
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In importlib.metadata, when a distribution file is corrupt and there is no
metadata file, calls to ``Distribution.metadata()`` (including implicit
calls from other properties like ``.name`` and ``.requires``) will now raise
a ``MetadataNotFound`` Exception. This allows callers to distinguish between
missing metadata and a degenerate (empty) metadata. Previously, if the file
was missing, an empty ``PackageMetadata`` would be returned and would be
indistinguishable from the presence of an empty file.
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