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BUG/TST: added TypeError if object dtypes are detected in dataframe Bug DataFrame DataFrame data structure Stale
#61682 by sharkipelago was closed Oct 5, 2025 Loading… updated Oct 5, 2025
3 of 4 tasks
BUG: fix bug in DataFrame.diff when dataframe has bool dtype and axis=1 Bug DataFrame DataFrame data structure Transformations e.g. cumsum, diff, rank
#57193 by yuanx749 was closed Jun 17, 2024 Loading… updated Jun 28, 2024
4 of 5 tasks
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
TYP: mostly DataFrame return overloads DataFrame DataFrame data structure Typing type annotations, mypy/pyright type checking
CLN: Enforce deprecation of axis=None in DataFrame reductions Clean DataFrame DataFrame data structure Reduction Operations sum, mean, min, max, etc.
PERF: Avoid Series constructor in DataFrame(dict(...), columns=) DataFrame DataFrame data structure Performance Memory or execution speed performance
REGR: DataFrame.update emits spurious warning about downcasting Bug Conditionals E.g. where, mask, case_when DataFrame DataFrame data structure Dtype Conversions Unexpected or buggy dtype conversions Regression Functionality that used to work in a prior pandas version Warnings Warnings that appear or should be added to pandas
Backport PR #57340 on branch 2.2.x (REGR: shift raising for axis=1 and empty df) DataFrame DataFrame data structure
ENH: Add limit_area to ffill/bfill DataFrame DataFrame data structure Enhancement Missing-data np.nan, pd.NaT, pd.NA, dropna, isnull, interpolate Series Series data structure
PERF: Cython 3.0 regression with frame constructor Constructors Series/DataFrame/Index/pd.array Constructors DataFrame DataFrame data structure Performance Memory or execution speed performance
#55931 by rhshadrach was merged Nov 13, 2023 Loading… updated Nov 13, 2023
5 tasks
BUG: DataFrame repr with ArrowDtype with extension Arrow pyarrow functionality DataFrame DataFrame data structure Output-Formatting __repr__ of pandas objects, to_string
ENH: add empty() methods for DataFrame and Series DataFrame DataFrame data structure Enhancement Series Series data structure
#12291 by gfyoung was closed Feb 11, 2016 Loading… updated May 11, 2023
PERF: Improve performance in DataFrame.filter DataFrame DataFrame data structure Indexing Related to indexing on series/frames, not to indexes themselves Performance Memory or execution speed performance
REGR: Fix regression in sort_values not resetting index DataFrame DataFrame data structure Regression Functionality that used to work in a prior pandas version
Backport PR #52565 on branch 2.0.x (REGR: Fix regression in sort_values not resetting index) DataFrame DataFrame data structure Regression Functionality that used to work in a prior pandas version
REF: define reductions non-dynamically DataFrame DataFrame data structure Refactor Internal refactoring of code Series Series data structure
DEPR: Enforce dropping of datetime in DataFrame.mean/median with numeric_only=None DataFrame DataFrame data structure Deprecate Functionality to remove in pandas Nuisance Columns Identifying/Dropping nuisance columns in reductions, groupby.add, DataFrame.apply Reduction Operations sum, mean, min, max, etc.
Backport PR #52054 on branch 2.0.x (PERF: Improve performance with copy=True and different dtype) DataFrame DataFrame data structure Performance Memory or execution speed performance
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