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Pull requests list

API/BUG: .apply will correctly infer output shape when axis=1 API Design Apply Apply, Aggregate, Transform, Map Bug Reshaping Concat, Merge/Join, Stack/Unstack, Explode
#18577 by jreback was merged Feb 7, 2018 Loading… 0.23.0
11
76
DOC: User Guide Page on user-defined functions Apply Apply, Aggregate, Transform, Map Docs
#61195 by arthurlw was merged May 18, 2025 Loading…
1 of 5 tasks
3.0
1
60
DEPR: DataFrameGroupBy.apply operating on the group keys Apply Apply, Aggregate, Transform, Map Deprecate Functionality to remove in pandas Groupby
#54950 by rhshadrach was merged Sep 7, 2023 Loading…
5 tasks done
2.2
1
50
BUG/PERF: groupby.transform with unobserved categories Apply Apply, Aggregate, Transform, Map Bug Categorical Categorical Data Type Groupby Performance Memory or execution speed performance
#58084 by undermyumbrella1 was merged May 8, 2024 Loading…
4 of 5 tasks
3.0
1
45
DOC: Groupby transform should mention that parameter can be a string Apply Apply, Aggregate, Transform, Map Docs Groupby
#50029 by seanjedi was merged Dec 13, 2022 Loading…
5 tasks
2.0
45
REF: Decouple Series.apply from Series.agg Apply Apply, Aggregate, Transform, Map Refactor Internal refactoring of code
#53400 by topper-123 was merged Jun 5, 2023 Loading… 2.1
44
DEPR: DataFrameGroupBy.apply operating on the group keys Apply Apply, Aggregate, Transform, Map Deprecate Functionality to remove in pandas Groupby
#52477 by rhshadrach was merged Apr 12, 2023 Loading…
5 tasks done
2.1
1
42
BUG: Fix issue with apply on empty DataFrame Apply Apply, Aggregate, Transform, Map
#28213 by dsaxton was merged Sep 20, 2019 Loading… 1.0.0
2
39
BUG: inconsistent DataFrame.agg behavoir when passing as kwargs numeric_only=True Apply Apply, Aggregate, Transform, Map Stale
#49534 by thlautenschlaeger was closed Jan 23, 2023 Loading…
5 tasks done
1
38
ENH: Add numba engine to df.apply Apply Apply, Aggregate, Transform, Map numba numba-accelerated operations
#55104 by lithomas1 was merged Oct 22, 2023 Loading…
5 tasks
2.2
38
ENH: Allow JIT compilation with an internal API Apply Apply, Aggregate, Transform, Map Enhancement
#61032 by datapythonista was merged Mar 14, 2025 Loading…
1 task done
3.0
1
35
BUG: fix Series.apply(..., by_row), v2. Apply Apply, Aggregate, Transform, Map Bug
#53601 by topper-123 was merged Jun 29, 2023 Loading… 2.1
32
Enh/group by.transform should accept similar arguments to group by.agg Apply Apply, Aggregate, Transform, Map Groupby
#58773 by abeltavares was closed Jun 26, 2024 Loading…
5 tasks done
1
31
BUG/CLN: Decouple Series/DataFrame.transform Apply Apply, Aggregate, Transform, Map Bug Clean
#35964 by rhshadrach was merged Sep 12, 2020 Loading…
5 tasks done
1.2
1
31
CLN: aggregation.transform Apply Apply, Aggregate, Transform, Map Clean
#36478 by rhshadrach was merged Oct 6, 2020 Loading…
3 of 5 tasks
1.2
1
31
BUG: fix DataFrame.apply returning wrong result when dealing with dtype (#28773) Apply Apply, Aggregate, Transform, Map Dtype Conversions Unexpected or buggy dtype conversions
#30304 by Reksbril was closed May 22, 2020 Loading…
5 tasks done
1
29
REF: Separate groupby, rolling, and window agg/apply list/dict-like Apply Apply, Aggregate, Transform, Map Refactor Internal refactoring of code
#53986 by rhshadrach was merged Jul 9, 2023 Loading…
5 tasks
2.1
29
BUG: idxmin & idxmax axis = 1 str reducer for transform Apply Apply, Aggregate, Transform, Map Bug Groupby
#50329 by iofall was merged Jan 5, 2023 Loading…
7 tasks done
2.0
29
BUG: Fix agg ingore arg/kwargs when given list like func Apply Apply, Aggregate, Transform, Map
#50863 by luke396 was merged Feb 12, 2023 Loading…
4 of 5 tasks
2.0
1
29
API/DEPR: Rename DataFrame.applymap to DataFrame.map Apply Apply, Aggregate, Transform, Map Deprecate Functionality to remove in pandas
#52364 by topper-123 was merged Apr 16, 2023 Loading…
4 of 5 tasks
2.1
1
27
DOC: Updated convert_dtype of Series.apply Apply Apply, Aggregate, Transform, Map Docs
#39941 by sukriti1 was merged Apr 25, 2021 Loading…
1 of 4 tasks
1.3
1
25
BUG: Fix calling groupBy(...).apply(func) on an empty dataframe invokes func Apply Apply, Aggregate, Transform, Map Bug Groupby Regression Functionality that used to work in a prior pandas version
#48579 by ntachukwu was merged Sep 27, 2022 Loading…
3 tasks done
1.5.1
1
24
PERF: Try fast/slow paths only once in DataFrameGroupby.transform Apply Apply, Aggregate, Transform, Map Groupby Performance Memory or execution speed performance
#42195 by rhshadrach was merged Jul 8, 2021 Loading…
3 tasks done
1.4
1
23
PERF: Allow jitting of groupby agg loop Apply Apply, Aggregate, Transform, Map Groupby Performance Memory or execution speed performance
#35759 by mroeschke was merged Aug 22, 2020 Loading…
4 tasks done
1.2
23
ENH: Add numba engine to groupby.transform Apply Apply, Aggregate, Transform, Map Enhancement Groupby
#32854 by mroeschke was merged Apr 16, 2020 Loading…
4 tasks done
1.1
22
ProTip! Updated in the last three days: updated:>2025-11-28.