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Pull requests: pandas-dev/pandas
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Avoid reindexing values assigned to a multi-index when cols_droplevel contains empty values Indexing Related to indexing on series/frames, not to indexes themselves MultiIndex
TST: regression test for GH#56853 (insert/delete with MultiIndex datetime) MultiIndex Testing pandas testing functions or related to the test suite
DOC: documenting pandas.MultIndex.argsort Closing Candidate May be closeable, needs more eyeballs Docs MultiIndex Sorting e.g. sort_index, sort_values
BUG: Fix Series.reindex losing values when reindexing to MultiIndex Index Related to the Index class or subclasses MultiIndex
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…
BUG: fix error message for multiindex.fillna Error Reporting Incorrect or improved errors from pandas MultiIndex
BUG: Fix bug in DataFrame binary op not respecting fill_value in case… MultiIndex Numeric Operations Arithmetic, Comparison, and Logical operations
BUG: Fix DataFrame binary arithmatic operation handling of unaligned … MultiIndex Numeric Operations Arithmetic, Comparison, and Logical operations
BUG: Don't merge Excel cells to a single row with merge_cells=False Bug IO Excel read_excel, to_excel MultiIndex
BUG: Convert output type in Excel for MultiIndex with period levels Bug IO Excel read_excel, to_excel MultiIndex Period Period data type
PERF: Only clear cached .levels when setting MultiIndex.names MultiIndex Performance Memory or execution speed performance
BUG: allow None as name in multi-index during join Bug MultiIndex Reshaping Concat, Merge/Join, Stack/Unstack, Explode
Added a test for the groupby MultiIndex with codes Groupby MultiIndex Testing pandas testing functions or related to the test suite
Fix insertion of None value in MultiIndex Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate MultiIndex
PERF: MultiIndex._engine use smaller dtypes MultiIndex Performance Memory or execution speed performance
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