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Pull requests: pandas-dev/pandas
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DEPR: Categorical.replace Categorical Categorical Data Type Deprecate Functionality to remove in pandas
Backport PR #43597 on branch 1.3.x (BUG: .cat changing dtype inplace) Bug Categorical Categorical Data Type
TST: Ensure makeCategoricalIndex categories are unique Categorical Categorical Data Type Testing pandas testing functions or related to the test suite
PERF: avoid object dtype cast for Categorical in _ensure_data Categorical Categorical Data Type Performance Memory or execution speed performance
BUG: CategoricalIndex.union with nans Categorical Categorical Data Type setops union, intersection, difference, symmetric_difference
Backport PR #48702 on branch 1.5.x (REGR: dropna affects observed in groupby) Bug Categorical Categorical Data Type Groupby Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Regression Functionality that used to work in a prior pandas version
DEPR: CategoricalIndex.take_nd Categorical Categorical Data Type Deprecate Functionality to remove in pandas
Backport PR #29393 on branch 1.0.x (BUG: GH25495 incorrect dtype when using .loc to set Categorical value for column in 1-row DataFrame) Bug Categorical Categorical Data Type Indexing Related to indexing on series/frames, not to indexes themselves
Backport PR #31939 on branch 1.0.x (BUG: Fix construction of Categorical from pd.NA) Categorical Categorical Data Type Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate
REF: CategoricalIndex indexing tests Categorical Categorical Data Type Indexing Related to indexing on series/frames, not to indexes themselves Testing pandas testing functions or related to the test suite
Backport PR #35936: (REGR: Fix inplace updates on column to set correct values) Categorical Categorical Data Type Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate
Backport PR #36249 on branch 1.1.x (BUG: na parameter for str.startswith and str.endswith not propagating for Series with categorical dtype) Categorical Categorical Data Type Strings String extension data type and string data
REF: de-duplicate Categorical validators Categorical Categorical Data Type Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Refactor Internal refactoring of code
TST/REF: misplaced Categorical tests Categorical Categorical Data Type Testing pandas testing functions or related to the test suite
CLN: remove unnecessary Categorical._validate_setitem_key Categorical Categorical Data Type Indexing Related to indexing on series/frames, not to indexes themselves Internals Related to non-user accessible pandas implementation
CLN: dont special-case should_store, CategoricalBlock Categorical Categorical Data Type Internals Related to non-user accessible pandas implementation
REF: re-use _validate_setitem_value in Categorical.fillna Categorical Categorical Data Type Indexing Related to indexing on series/frames, not to indexes themselves Refactor Internal refactoring of code
REF: make casting explicit in CategoricalIndex Categorical Categorical Data Type Typing type annotations, mypy/pyright type checking
REF: ensure CategoricalIndex._shallow_copy only ever gets Categorical Categorical Categorical Data Type Index Related to the Index class or subclasses
REF: de-duplicate CategoricalIndex.get_indexer Categorical Categorical Data Type Refactor Internal refactoring of code
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