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REF: use _cast_pointwise_result in map

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

pyarrow dtype retentionop with pyarrow dtype -> expect pyarrow resultop with pyarrow dtype -> expect pyarrow result

RefactorInternal refactoring of codeInternal refactoring of code

Status: Open.

#62164 In pandas-dev/pandas;

· jbrockmendel opened on Aug 21, 2025

BUG: Dataframe.aggregate drops pyarrow backend for lambda aggregation functions

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Arrowpyarrow functionalitypyarrow functionality

Bug

pyarrow dtype retentionop with pyarrow dtype -> expect pyarrow resultop with pyarrow dtype -> expect pyarrow result

Status: Open.

#61812 In pandas-dev/pandas;

· flori-ko opened on Jul 8, 2025

PERF: Arrow dtypes are much slower than Numpy for DataFrame.apply

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Arrowpyarrow functionalitypyarrow functionality

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Open.

#61747 In pandas-dev/pandas;

· ehsantn opened on Jun 30, 2025

BUG: mapping categorical with single category to boolean returns category instead of bool dtype

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Bug

CategoricalCategorical Data TypeCategorical Data Type

Status: Open.

#61719 In pandas-dev/pandas;

· kdebrab opened on Jun 27, 2025

DOC: warn about apply with raw=True, if function returns Optional[int]

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Docs

Status: Open.

#61632 In pandas-dev/pandas;

· wrschneider opened on Jun 11, 2025

BUG: PerformanceWarning when agg with pd.NamedAgg and as_index=False

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Bug

Needs InfoClarification about behavior needed to assess issueClarification about behavior needed to assess issue

WarningsWarnings that appear or should be added to pandasWarnings that appear or should be added to pandas

Status: Open.

#61628 In pandas-dev/pandas;

· xma08 opened on Jun 10, 2025

API: Replace na_action parameter in Series/DataFrame/Index.map by the standard skipna

API Design

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Stale

Status: Open (in progress).

pandas-dev/pandasnumber 61530

#61530 In pandas-dev/pandas;

· datapythonista opened on Jun 1, 2025

Implemented NumbaExecutionEngine

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Stale

Status: Open (in progress).

pandas-dev/pandasnumber 61487

#61487 In pandas-dev/pandas;

· arthurlw opened on May 23, 2025

Use BaseExecutionEngine for Python and Numba engines

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Status: Open.

#61458 In pandas-dev/pandas;

· datapythonista opened on May 19, 2025

BUG: way to include all columns within a groupby apply

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Bug

Closing CandidateMay be closeable, needs more eyeballsMay be closeable, needs more eyeballs

Groupby

Status: Open.

#61406 In pandas-dev/pandas;

· madelavar12 opened on May 8, 2025

Improve the apply/map APIs

API - ConsistencyInternal Consistency of API/BehaviorInternal Consistency of API/Behavior

API Design

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Needs DiscussionRequires discussion from core team before further actionRequires discussion from core team before further action

Status: Open.

#61128 In pandas-dev/pandas;

· datapythonista opened on Mar 15, 2025

ENH: Supporting third-party engines for all <code>map</code> and <code>apply</code> methods

ApplyApply, Aggregate, Transform, MapApply, Aggregate, Transform, Map

Status: Open.

#61125 In pandas-dev/pandas;

· datapythonista opened on Mar 15, 2025