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PERF: Offset classes access private variables via properties instead of directly in offsets.pyx

FrequencyDateOffsetsDateOffsets

PerformanceMemory or execution speed performanceMemory or execution speed performance

Status: Open.

#63967 In pandas-dev/pandas;

· tuhinsharma121 opened on Jan 31, 2026

ENH: Allow <code>np.ndarray</code> in <code>check_result_array</code> for certain <code>dtype</code>

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

Enhancement

Groupby

Status: Open.

#63957 In pandas-dev/pandas;

· Julian-Harbeck opened on Jan 31, 2026

BUG: Odd behavior of <code>Index.searchsorted</code>

Bug

Dtype ConversionsUnexpected or buggy dtype conversionsUnexpected or buggy dtype conversions

Status: Open.

#63938 In pandas-dev/pandas;

· bilichboris opened on Jan 29, 2026

BUG: refs not set when creating DataFrame from Series/Index with StringDtype

Bug

Copy / view semantics

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

Status: Open.

#63936 In pandas-dev/pandas;

· kjmin622 opened on Jan 29, 2026

BUG: 3.0.0 Regression - can no longer shuffle <code>Series[string]</code> with numpy

Bug

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

Status: Open.

#63935 In pandas-dev/pandas;

· randolf-scholz opened on Jan 29, 2026

·  

3.0.1

BUG: assert_frame_equal changes behavior in 3.0 for nested arrays without documentation

Bug

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

Status: Open.

#63904 In pandas-dev/pandas;

· gaogaotiantian opened on Jan 27, 2026

BUG: Pandas converts nullable int to float, even when this loses data

Bug

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

Status: Open.

#63903 In pandas-dev/pandas;

· Nodrance opened on Jan 27, 2026

BUG: string regex operation with unicode escape sequence failing

Arrowpyarrow functionalitypyarrow functionality

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

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

Status: Open.

#63901 In pandas-dev/pandas;

· jorisvandenbossche opened on Jan 27, 2026

·  

3.0.1

BUG: Handling of <code>None</code> column name in <code>from_records()</code> is now all-NaN instead of values

Bug

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

IO DataIO issues that don't fit into a more specific labelIO issues that don't fit into a more specific label

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

Status: Open.

#63889 In pandas-dev/pandas;

· aneroid opened on Jan 26, 2026

·  

3.0.1

BUG: Conversion from numpy masked arrays to pandas array does not preserve missing values

Bug

ConstructorsSeries/DataFrame/Index/pd.array ConstructorsSeries/DataFrame/Index/pd.array Constructors

Status: Open.

#63879 In pandas-dev/pandas;

· grst opened on Jan 26, 2026

BUG: AttributeError: 'ArrowStringArray' object has no attribute 'item'

Bug

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

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

Status: Open.

#63876 In pandas-dev/pandas;

· khaeru opened on Jan 25, 2026

BUG: ExponentialMovingWindow.agg/aggregate fails when passing a callable

Bug

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Open.

#63855 In pandas-dev/pandas;

· loicdiridollou opened on Jan 24, 2026