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gh-141510: Don't accept frozendict in PyDict_Watch()#145529

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vstinner merged 1 commit into
python:mainfrom
vstinner:dict_watch
Mar 5, 2026
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gh-141510: Don't accept frozendict in PyDict_Watch()#145529
vstinner merged 1 commit into
python:mainfrom
vstinner:dict_watch

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@vstinner vstinner commented Mar 5, 2026

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Don't accept frozendict in PyDict_Watch() and PyDict_Unwatch(). A frozendict cannot be modified, so it's not useful to watch for modifications.

Don't accept frozendict in PyDict_Watch() and PyDict_Unwatch(). A
frozendict cannot be modified, so it's not useful to watch for
modifications.
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vstinner commented Mar 5, 2026

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I don't recall why I modified PyDict_Watch() and PyDict_Unwatch() to accept frozendict in my commit 696cdfc. Maybe I just replaced mechanically PyDict_Check() with PyAnyDict_Check().

A frozendict cannot be modified, so it's not useful to watch for modifications.

If later, it becomes useful, we can modify the functions again. But I prefer to start by not accepting them.

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vstinner commented Mar 5, 2026

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cc @corona10 @Fidget-Spinner

@vstinner vstinner merged commit 0fe20fc into python:main Mar 5, 2026
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@vstinner vstinner deleted the dict_watch branch March 5, 2026 11:31
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vstinner commented Mar 5, 2026

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Merged. Thanks for the review @Fidget-Spinner.

ljfp pushed a commit to ljfp/cpython that referenced this pull request Apr 25, 2026
…5529)

Don't accept frozendict in PyDict_Watch() and PyDict_Unwatch().
A frozendict cannot be modified, so it's not useful to watch for
modifications.
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