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Preserve recent multiple-use metadata fields in JSON #545

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Merged
jaraco merged 3 commits into from
Nov 9, 2026
Merged

Preserve recent multiple-use metadata fields in JSON #545

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69ec928
Preserve recent multiple-use metadata fields in JSON
kokotatan Oct 3, 2026
749eafe
Merge remote-tracking branch 'origin/main' into pr-545
jaraco Nov 7, 2026
a21b33e
Remove the regression test for the added multiple-use keys.
jaraco Nov 7, 2026
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5 changes: 4 additions & 1 deletion importlib_metadata/_adapters.py
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Original file line number Diff line number Diff line change
Expand Up @@ -59,6 +59,9 @@ class Message(email.message.Message):
FoldedCase,
[
'Classifier',
'Import-Name',
'Import-Namespace',
'License-File',
'Obsoletes-Dist',
'Platform',
'Project-URL',
Expand All @@ -72,7 +75,7 @@ class Message(email.message.Message):
)
)
"""
Keys that may be indicated multiple times per PEP 566.
Keys that may be indicated multiple times in Core Metadata.
"""

def __new__(cls, orig: email.message.Message):
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1 change: 1 addition & 0 deletions newsfragments/+json-multiple-use.bugfix.rst
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@@ -0,0 +1 @@
Return ``License-File``, ``Import-Name``, and ``Import-Namespace`` as lists in JSON-compatible metadata, including when only one value is present, and retain all repeated values as required by PEP 566.