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Pull requests: pandas-dev/pandas
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[backport 2.3.x] BUG: Fixed assign failure when with Copy-on-Write (#60941) Copy / view semantics Indexing Related to indexing on series/frames, not to indexes themselves
CoW: disable chained assignment detection for Python 3.14 Copy / view semantics Indexing Related to indexing on series/frames, not to indexes themselves Python 3.14
TST: add regression test for GH#54409 (tz-aware NaT indexing with loc) Indexing Related to indexing on series/frames, not to indexes themselves Testing pandas testing functions or related to the test suite
#62245 by skalwaghe-56 was merged Sep 10, 2025 Loading…
3 tasks done
Fix alignment in Series subtraction with MultiIndex, Index and NaN values (#60908) Bug Indexing Related to indexing on series/frames, not to indexes themselves Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate MultiIndex Stale
#61381 by rit4rosa was closed Oct 5, 2025 Loading…
Backport PR #60454 on branch 2.3.x (String dtype: coerce missing values in indexers for string dtype Index) Indexing Related to indexing on series/frames, not to indexes themselves Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Strings String extension data type and string data
[backport 2.3.x] String dtype: use ObjectEngine for indexing for now correctness over performance (#60329) Indexing Related to indexing on series/frames, not to indexes themselves Strings String extension data type and string data
Backport PR #57061 on branch 2.2.x (REGR: non-unique, masked dtype index raising IndexError) Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
wip: depr partial row-wise multi-column-wise enlargement Deprecate Functionality to remove in pandas Indexing Related to indexing on series/frames, not to indexes themselves
#56872 by MarcoGorelli was closed Feb 16, 2024 • Draft
5 tasks
Backport PR #56635 on branch 2.2.x (CoW: Boolean indexer in MultiIndex raising read-only error) Blocker Blocking issue or pull request for an upcoming release Copy / view semantics Indexing Related to indexing on series/frames, not to indexes themselves
Backport PR #55249 on branch 2.1.x (BUG: incompatible dtype when creating string column with loc) Indexing Related to indexing on series/frames, not to indexes themselves
Backport PR #54982 on branch 2.1.x (REG: filter not respecting the order of labels) Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
REG: filter not respecting the order of labels Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
Backport PR #54823 on branch 2.1.x (REGR: clip raising for list-bound) Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
Backport PR #54699 on branch 2.1.x (BUG: setitem with object type inserting Series maintains Series) Indexing Related to indexing on series/frames, not to indexes themselves Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
Backport PR #54508 on branch 2.1.x (PERF: DataFrame.iloc[int] for EA dtypes) ExtensionArray Extending pandas with custom dtypes or arrays. Indexing Related to indexing on series/frames, not to indexes themselves Performance Memory or execution speed performance
BUG: setitem with object type inserting Series maintains Series Indexing Related to indexing on series/frames, not to indexes themselves Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
Backport PR #54641 on branch 2.1.x (BUG: getitem indexing wrong axis) Blocker Blocking issue or pull request for an upcoming release Indexing Related to indexing on series/frames, not to indexes themselves Regression Functionality that used to work in a prior pandas version
Backport PR #53652: BUG: Indexing a timestamp ArrowDtype Index Arrow pyarrow functionality Indexing Related to indexing on series/frames, not to indexes themselves
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