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Potential regression induced by "Refactored pandas_timedelta_to_timedeltastruct"

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

PerformanceMemory or execution speed performanceMemory or execution speed performance

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

Status: Open.

#57951 In pandas-dev/pandas;

· DeaMariaLeon opened on Mar 21, 2024

Potential regression induced by PR #56921

PerformanceMemory or execution speed performanceMemory or execution speed performance

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

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

Status: Open.

#57641 In pandas-dev/pandas;

· DeaMariaLeon opened on Feb 27, 2024

BUG / API: setitem on pandas object fails if underlying numpy array is read-only

API Design

IndexingRelated to indexing on series/frames, not to indexes themselvesRelated to indexing on series/frames, not to indexes themselves

Status: Open.

#62144 In pandas-dev/pandas;

· jorisvandenbossche opened on Aug 19, 2025

TRACKER: new default String dtype (pyarrow-backed, numpy NaN semantics)

API Design

Arrowpyarrow functionalitypyarrow functionality

StringsString extension data type and string dataString extension data type and string data

Status: Open.

#54792 In pandas-dev/pandas;

· jorisvandenbossche opened on Aug 28, 2023

Copy-on-Write (PDEP-7) follow-up overview issue

Copy / view semantics

Master TrackerHigh level tracker for similar issuesHigh level tracker for similar issues

Status: Open.

#48998 In pandas-dev/pandas;

· jorisvandenbossche opened on Oct 7, 2022

BUG: Behavior change in pandas 3.x with <code>Series.resample</code> and <code>closed="right", how="right"</code>

Bug

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

Resampleresample methodresample method

Status: Open.

#62200 In pandas-dev/pandas;

· TomAugspurger opened on Aug 26, 2025

PDEP-8 inplace keyword deprecation - implementation tracker issue

inplaceRelating to inplace parameter or equivalentRelating to inplace parameter or equivalent

Master TrackerHigh level tracker for similar issuesHigh level tracker for similar issues

Status: Open.

#63207 In pandas-dev/pandas;

· jorisvandenbossche opened on Nov 26, 2025

DEP: Drop NumPy 1.26 support

DependenciesRequired and optional dependenciesRequired and optional dependencies

Status: Open.

#63403 In pandas-dev/pandas;

· rhshadrach opened on Dec 17, 2025

BUG: for ordered categorical data implements correct computation of kendall/spearman correlations

Bug

CategoricalCategorical Data TypeCategorical Data Type

cov/corr

Status: Open (in progress).

pandas-dev/pandasnumber 62880

#62880 In pandas-dev/pandas;

· pandeconscious opened on Oct 27, 2025

API: implement Period(|Dtype|Array|Index).unit, remove ._freqstr

PeriodPeriod data typePeriod data type

Status: Draft (not ready).

pandas-dev/pandasnumber 64155

#64155 In pandas-dev/pandas;

· jbrockmendel opened on Feb 15, 2026

BUG: fix indexing a SparseArray with len(arr) index returning fill value instead of raising

Bug

IndexingRelated to indexing on series/frames, not to indexes themselvesRelated to indexing on series/frames, not to indexes themselves

SparseSparse Data TypeSparse Data Type

Status: Open (in progress).

pandas-dev/pandasnumber 64183

#64183 In pandas-dev/pandas;

· jorisvandenbossche opened on Feb 17, 2026

REGR/PERF: Fix perf regression in _LocationIndexer._post_expansion_casting

PerformanceMemory or execution speed performanceMemory or execution speed performance

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

Status: Open (in progress).

pandas-dev/pandasnumber 64388

#64388 In pandas-dev/pandas;

· rhshadrach opened on Mar 3, 2026