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Pull requests: pandas-dev/pandas
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TST: add fillna test for filling with Categorical Categorical Categorical Data Type Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Needs Tests Unit test(s) needed to prevent regressions Stale
#62319 by thaiv28 was closed Nov 1, 2025 Loading… updated Nov 1, 2025
3 tasks done
BUG: value_counts() check Index with PyArrow categorical columns Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Arrow pyarrow functionality Bug Categorical Categorical Data Type Stale
#60569 by meryadri was closed Jan 27, 2025 Loading… updated Jan 27, 2025
3 of 5 tasks
Handling conversion of empty categorical with dtype_backend='pyarrow' Bug Categorical Categorical Data Type Stale
BUG: Categorical.__setitem__ allows for tuple assignment Categorical Categorical Data Type Enhancement
#21412 by alysivji was closed Jul 16, 2018 Loading… updated Jun 17, 2024
4 tasks done
BUG: Ensure dataframe preserves categorical indices with categorial series Categorical Categorical Data Type Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure
#57635 by jmarintur was closed May 31, 2024 Loading… updated Jun 1, 2024
2 tasks done
API/DEPR: Change default skipna behaviour + deprecate numeric_only in Categorical.min and max API Design Categorical Categorical Data Type Deprecate Functionality to remove in pandas
ENH: allow better categorical dtype strings, e.g. Categorical Data Type Enhancement Stale
category[string] Categorical #53190 by topper-123 was closed Oct 12, 2023 Loading… updated Oct 12, 2023
4 of 6 tasks
Bug can't compute cummin/cummax on ordered categorical #52335 Categorical Categorical Data Type Transformations e.g. cumsum, diff, rank
#52870 by YifanChao was closed May 22, 2023 Loading… updated May 22, 2023
5 tasks
BUG: Categorical.copy deep kwarg Algos Non-arithmetic algos: value_counts, factorize, sorting, isin, clip, shift, diff Categorical Categorical Data Type
#27024 by jbrockmendel was closed Jun 27, 2019 Loading… updated May 11, 2023
2 of 4 tasks
PERF: __contains__ method for Categorical Categorical Categorical Data Type Performance Memory or execution speed performance
#21022 by fjetter was closed Jun 19, 2018 Loading… updated May 11, 2023
4 tasks done
BUG: Copy categorical codes if empty (fixes #18051) Categorical Categorical Data Type Regression Functionality that used to work in a prior pandas version
#18279 by ghasemnaddaf was closed Nov 22, 2017 Loading… updated May 11, 2023
4 tasks done
TST: add tests to validate margin results for pivot (#25815) Categorical Categorical Data Type Reshaping Concat, Merge/Join, Stack/Unstack, Explode Testing pandas testing functions or related to the test suite
BUG: fix bug where appending unordered Categorical Data Type
CategoricalIndex variables overrides index Categorical ENH: Make categories setitem error more readable Categorical Categorical Data Type Error Reporting Incorrect or improved errors from pandas Stale
#47624 by siddartha-10 was closed Aug 15, 2022 Loading… updated Aug 15, 2022
tocsv_interval _categories Bug Categorical Categorical Data Type IO CSV read_csv, to_csv Regression Functionality that used to work in a prior pandas version
BUG: pd.concat produces frames with inconsistent order when concating the ones with categorical indices Categorical Categorical Data Type Reshaping Concat, Merge/Join, Stack/Unstack, Explode Stale
REF: Move Categorical logic from Grouping (#46203) Categorical Categorical Data Type Groupby Refactor Internal refactoring of code
#46207 by NickCrews was closed Mar 8, 2022 Loading… updated Mar 8, 2022
4 tasks done
ENH: Support observed keyword argument in Categorical.value_counts Categorical Categorical Data Type Enhancement Stale
#44002 by AndrewEckart was closed Feb 22, 2022 Loading… updated Feb 22, 2022
4 tasks done
BUG: CategoricalIndex.get_indexer issue with NaNs (#45361) Categorical Categorical Data Type Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate
#45373 by Shashank-Shet was merged Jan 28, 2022 Loading… updated Jan 28, 2022
2 of 4 tasks
DEPR: inplace setting of Categorical.categories Categorical Categorical Data Type Deprecate Functionality to remove in pandas Mothballed Temporarily-closed PR the author plans to return to
Add fix to raise error when category value 'x' is not predefined but is assigned through df.loc[..]=x Categorical Categorical Data Type Indexing Related to indexing on series/frames, not to indexes themselves
#34011 by chrispe was closed Oct 4, 2021 Loading… updated Oct 4, 2021
4 tasks done
TST Providing unit test to snippet GH32414 Categorical Categorical Data Type ExtensionArray Extending pandas with custom dtypes or arrays. Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Testing pandas testing functions or related to the test suite
#43136 by Bhavay-2001 was closed Aug 27, 2021 Loading… updated Aug 27, 2021
1 task done
Deprecate groupby/pivot observed=False default Categorical Categorical Data Type Deprecate Functionality to remove in pandas Needs Discussion Requires discussion from core team before further action Stale
#35967 by jseabold was closed Jul 11, 2021 Loading… updated Jul 11, 2021
5 tasks done
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