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Raise MergeError on mismatched signed/unsigned int merge keys

Bug

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

Status: Open (in progress).

pandas-dev/pandasnumber 61694

#61694 In pandas-dev/pandas;

· RITAMIT2023 opened on Jun 23, 2025

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

Bug

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.

#61688 In pandas-dev/pandas;

· mratkin0 opened on Jun 22, 2025

ENH #61033: Add coalesce_keys option to DataFrame.join for preserving join keys

Enhancement

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

Status: Open (in progress).

pandas-dev/pandasnumber 61678

#61678 In pandas-dev/pandas;

· rit4rosa opened on Jun 19, 2025

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

Bug

CategoricalCategorical Data TypeCategorical Data Type

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.

#61675 In pandas-dev/pandas;

· tvoipio opened on Jun 18, 2025

BUG: Fix pivot_table margins to include NaN groups when dropna=False

Bug

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

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

Status: Open (in progress).

pandas-dev/pandasnumber 61524

#61524 In pandas-dev/pandas;

· iabhi4 opened on May 31, 2025

BUG: margin for pivot_table is incorrect with NA column/index values

Bug

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

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

Status: Open.

#61509 In pandas-dev/pandas;

· vtraag opened on May 28, 2025

ENH: Add <code>force_suffixes</code> boolean argument to <code>pd.merge</code>

Enhancement

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

Status: Open (in progress).

pandas-dev/pandasnumber 61498

#61498 In pandas-dev/pandas;

· kopytjuk opened on May 26, 2025

BUG: Raise TypeError when joining with non-DataFrame using 'on=' (GH#61434)

Error ReportingIncorrect or improved errors from pandasIncorrect or improved errors from pandas

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

Stale

Status: Open (in progress).

pandas-dev/pandasnumber 61454

#61454 In pandas-dev/pandas;

· iabhi4 opened on May 18, 2025

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

BUG: Exception with <code>unstack(sort=False)</code> and NA in index

Bug

ExtensionArrayExtending pandas with custom dtypes or arrays.Extending pandas with custom dtypes or arrays.

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

Status: Open.

#61221 In pandas-dev/pandas;

· jlumpe opened on Apr 3, 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