CoW: add readonly flag to ExtensionArrays, return read-only EA/ndarray in .array/EA.to_numpy()#61925

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jorisvandenbossche wants to merge 30 commits intopandas-dev:mainfrom

jorisvandenbossche:cow-ea-readonly

Commits on Jul 22, 2025

Commits on Jul 23, 2025

Commits on Aug 3, 2025

Commits on Aug 19, 2025

Merge remote-tracking branch 'upstream/main' into cow-ea-readonly
jorisvandenbossche
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Commits on Sep 7, 2025

Merge remote-tracking branch 'upstream/main' into cow-ea-readonly
jorisvandenbossche
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address feedback: use _values in tests + add comment
jorisvandenbossche
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Commits on Sep 8, 2025

Commits on Sep 9, 2025

fix numpy test setup
jorisvandenbossche
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Commits on Sep 12, 2025

Merge remote-tracking branch 'upstream/main' into cow-ea-readonly
jorisvandenbossche
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Commits on Oct 8, 2025

Commits on Oct 10, 2025

Merge remote-tracking branch 'upstream/main' into cow-ea-readonly
jorisvandenbossche
committed

Commits on Oct 21, 2025