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Fix TypedDict qualifier inheritance with same name#677

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JanEricNitschke wants to merge 2 commits intopython:main from
JanEricNitschke:update-typedict-key-attributes
Open

Fix TypedDict qualifier inheritance with same name #677
JanEricNitschke wants to merge 2 commits intopython:main from
JanEricNitschke:update-typedict-key-attributes

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@JanEricNitschke JanEricNitschke commented Sep 11, 2025

Discovered through CPython 3.14 test_typing.py: https://github.com/JanEricNitschke/typing_extensions/actions/runs/17619859892/job/50062609198#step:7:44

Tests and code are directly taken from CPython 3.14.

Tests: https://github.com/python/cpython/blob/3.14/Lib/test/test_typing.py#L8616

Code: https://github.com/python/cpython/blob/3.14/Lib/typing.py#L3139

Except that i omitted the raising of the TypeError when overwriting a mutable key with a read-only key pending further discussion.

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codecov bot commented Sep 11, 2025
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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.38%. Comparing base (9215c95) to head (bbf9dff).

@@ Coverage Diff @@
## main #677 +/- ##
==========================================
+ Coverage 97.36% 97.38% +0.01% 
==========================================
 Files 3 3 
 Lines 7680 7716 +36 
==========================================
+ Hits 7478 7514 +36 
 Misses 202 202 
Flag Coverage Δ
3.10 89.04% <100.00%> (+0.05%) ⬆️
3.10.4 89.04% <100.00%> (+0.05%) ⬆️
3.11 88.28% <100.00%> (?)
3.11.0 87.51% <100.00%> (+0.05%) ⬆️
3.12 88.23% <100.00%> (+0.05%) ⬆️
3.12.0 88.21% <100.00%> (+0.05%) ⬆️
3.13 82.47% <100.00%> (?)
3.13.0 82.47% <100.00%> (+0.08%) ⬆️
3.14 78.91% <100.00%> (+0.07%) ⬆️
3.9 89.75% <100.00%> (+0.04%) ⬆️
3.9.12 89.75% <100.00%> (+0.04%) ⬆️
pypy3.10 88.88% <100.00%> (+0.05%) ⬆️
pypy3.11 88.14% <100.00%> (+0.05%) ⬆️
pypy3.9 89.59% <100.00%> (+0.04%) ⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines Coverage Δ
src/test_typing_extensions.py 98.40% <100.00%> (+<0.01%) ⬆️
src/typing_extensions.py 93.91% <100.00%> (+0.02%) ⬆️
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This should also fix #308

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