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ENH: Add Series.split and DataFrame.split

Enhancement

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

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#62719 In pandas-dev/pandas;

· rhshadrach opened on Oct 16, 2025

BUG: Merge_asof fails for unknow reason

Docs

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#62497 In pandas-dev/pandas;

· igjayanth opened on Sep 29, 2025

BUG: _get_common_dtype with date32[pyarrow] and null[pyarrow]

Arrowpyarrow functionalitypyarrow functionality

Bug

datetime.datestdlib datetime.date supportstdlib datetime.date support

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#62343 In pandas-dev/pandas;

· jbrockmendel opened on Sep 15, 2025

BUG: Inconsistent behaviour when merging reset-ed MultiIndex dataframe

Bug

MultiIndex

Needs TestsUnit test(s) needed to prevent regressionsUnit test(s) needed to prevent regressions

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#62150 In pandas-dev/pandas;

· renkeven opened on Aug 20, 2025

BUG: Merge duplicates and validation failure when columns have type int64 and uint64

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

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

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#61688 In pandas-dev/pandas;

· mratkin0 opened on Jun 22, 2025

BUG: DataFrame.join(other) raises InvalidIndexError if column index is CategoricalIndex

Bug

CategoricalCategorical Data TypeCategorical Data Type

RegressionFunctionality that used to work in a prior pandas versionFunctionality that used to work in a prior pandas version

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#61675 In pandas-dev/pandas;

· tvoipio opened on Jun 18, 2025

· 

2.3.4

BUG: NA are coerced in to NaN by concat

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Missing-datanp.nan, pd.NaT, pd.NA, dropna, isnull, interpolatenp.nan, pd.NaT, pd.NA, dropna, isnull, interpolate

PDEP missing valuesIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprintIssues that would be addressed by the Ice Cream Agreement from the Aug 2023 sprint

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#61303 In pandas-dev/pandas;

· davetapley opened on Apr 17, 2025

BUG: join unexpectedly created extra column start with "key_"

Bug

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#61294 In pandas-dev/pandas;

· albb318 opened on Apr 15, 2025

ENH: merge_asof threshold minimum

Enhancement

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

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

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#61164 In pandas-dev/pandas;

· Lituchy opened on Mar 21, 2025

ENH: Add <code>coalesce_keys</code> option to join

Enhancement

Needs TriageIssue that has not been reviewed by a pandas team memberIssue that has not been reviewed by a pandas team member

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#61033 In pandas-dev/pandas;

· tylerriccio33 opened on Mar 3, 2025

BUG: crosstab(aggfunc='skew') raises IndexError: single positional indexer is out-of-bounds

Bug

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#60768 In pandas-dev/pandas;

· sfc-gh-mvashishtha opened on Jan 23, 2025

BUG: pd.crosstab(dropna=True, values=) drops rows and columns where any aggregation result is null.

Bug

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

ReshapingConcat, Merge/Join, Stack/Unstack, ExplodeConcat, Merge/Join, Stack/Unstack, Explode

Status: Open.

#60767 In pandas-dev/pandas;

· sfc-gh-mvashishtha opened on Jan 22, 2025