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Issues list

BUG: way to include all columns within a groupby apply Apply Apply, Aggregate, Transform, Map Bug Closing Candidate May be closeable, needs more eyeballs Groupby
#61406 opened May 8, 2025 by madelavar12
3 tasks done
4
BUG: PyArrow timestamp type does not work with map() function Apply Apply, Aggregate, Transform, Map Arrow pyarrow functionality Bug
#61231 opened Apr 4, 2025 by dbalabka
3 tasks done
1
@arthurlw
2
DOC: User Guide Page on user-defined functions Apply Apply, Aggregate, Transform, Map Docs
#61195 opened Mar 28, 2025 by arthurlw Loading…
1 of 5 tasks
1
56
Improve the apply/map APIs API - Consistency Internal Consistency of API/Behavior API Design Apply Apply, Aggregate, Transform, Map Needs Discussion Requires discussion from core team before further action
#61128 opened Mar 15, 2025 by datapythonista
@HoqueUM
6
DOC: Write user guide page on apply/map/transform methods Apply Apply, Aggregate, Transform, Map Docs
#61126 opened Mar 15, 2025 by datapythonista
1
@arthurlw
3
ENH: Supporting third-party engines for all map and apply methods Apply Apply, Aggregate, Transform, Map
#61125 opened Mar 15, 2025 by datapythonista
13
BUG: Inconsistent behaviour of apply with result_type='expand' for functions that can return NaN type values Apply Apply, Aggregate, Transform, Map Docs
#61057 opened Mar 4, 2025 by finnhacks42
2 of 3 tasks
@PenguinPen
2
BUG: .map & .apply would convert element type for extension array. Apply Apply, Aggregate, Transform, Map Bug NA - MaskedArrays Related to pd.NA and nullable extension arrays
#60766 opened Jan 22, 2025 by colinfang
2 of 3 tasks
2
@KevsterAmp
6
ENH: Allow s.map(d, na_action='raise') Apply Apply, Aggregate, Transform, Map
#60482 opened Dec 3, 2024 by kopytjuk Loading…
2 of 4 tasks
5
BUG: single column DataFrame df.apply(f, raw=True, engine='numba') failed when f is a non-reduction function Apply Apply, Aggregate, Transform, Map Bug Needs Discussion Requires discussion from core team before further action numba numba-accelerated operations
#60297 opened Nov 13, 2024 by auderson
3 tasks done
2
DataFrameGroupBy.agg with nan results into inf Apply Apply, Aggregate, Transform, Map Bug Groupby
#59106 opened Jun 26, 2024 by glaucouri
3 tasks done
1
@kushagr96
4
ENH: GroupBy.transform should accept similar arguments to GroupBy.agg Apply Apply, Aggregate, Transform, Map Enhancement Groupby
#58318 opened Apr 18, 2024 by WillAyd
1 of 3 tasks
1
@abeltavares
5
ENH: pd.NamedAgg should accept args and kwargs Apply Apply, Aggregate, Transform, Map Enhancement Groupby
#58283 opened Apr 16, 2024 by WillAyd
1 of 3 tasks
1
@haiyashah
5
ENH: Should we support aggregating by-frame in DataFrameGroupBy.agg Apply Apply, Aggregate, Transform, Map Enhancement Groupby Needs Discussion Requires discussion from core team before further action
#58225 opened Apr 11, 2024 by rhshadrach
6
DOC: Update Series.map to reflect usage like DataFrame.map Apply Apply, Aggregate, Transform, Map Docs
#58184 opened Apr 8, 2024 by WillAyd
1 task done
2
BUG: groupby(group_keys=False).apply(func=transform_function) with duplicate index does not preserve original dataframe order Apply Apply, Aggregate, Transform, Map Bug Groupby
#57906 opened Mar 18, 2024 by sfc-gh-mvashishtha
2 of 3 tasks
@AfonsoOrmonde
9
BUG: groupby.agg should always agg API Design Apply Apply, Aggregate, Transform, Map Enhancement Groupby Needs Discussion Requires discussion from core team before further action
#57706 opened Mar 2, 2024 by rhshadrach Loading…
6 tasks done
3.0
6
6
BUG: Misleading error message when aggregating duplicate columns Apply Apply, Aggregate, Transform, Map Bug Needs Discussion Requires discussion from core team before further action
#55964 opened Nov 14, 2023 by NickiForte
2 of 3 tasks
1
3
BUG: pandas groupby.apply return type changes depending on number of unique groupkeys for same custom-function Apply Apply, Aggregate, Transform, Map Bug Groupby
#54992 opened Sep 4, 2023 by Jakobhenningjensen
3 tasks done
12
DEPR: deprecate element-wise operations in (Series|DataFrame).transform Apply Apply, Aggregate, Transform, Map Deprecate Functionality to remove in pandas Transformations e.g. cumsum, diff, rank
#54906 opened Aug 31, 2023 by topper-123
1
12
ENH: support apply method for ExtensionArray backed DataFrame Apply Apply, Aggregate, Transform, Map Enhancement ExtensionArray Extending pandas with custom dtypes or arrays. Needs Discussion Requires discussion from core team before further action
#54584 opened Aug 16, 2023 by andrewgsavage
1 of 3 tasks
BUG: list output incorrectly reused when calling DataFrame.apply Apply Apply, Aggregate, Transform, Map Bug Nested Data Data where the values are collections (lists, sets, dicts, objects, etc.).
#54250 opened Jul 25, 2023 by pkch
3 tasks done
2
PERF: Accidental discovery r.e. explode method Apply Apply, Aggregate, Transform, Map Performance Memory or execution speed performance
#53967 opened Jul 2, 2023 by rebeccalauren88
2 of 3 tasks
@tpackard1
4
BUG: Can't pass arguments to DataFrameGroupBy.agg when using list/dict-like and string aliases Apply Apply, Aggregate, Transform, Map Bug Groupby Reduction Operations sum, mean, min, max, etc.
#53839 opened Jun 25, 2023 by sartajsartaj
1 of 3 tasks
3
BUG: Groupby-aggregate on a boolean column returns a different datatype with pyarrow than with numpy Apply Apply, Aggregate, Transform, Map Arrow pyarrow functionality Bug Groupby pyarrow dtype retention op with pyarrow dtype -> expect pyarrow result
#53030 opened May 2, 2023 by brian-recurve
2 of 3 tasks
3
8
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