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BUG: Python 3.14 no-gil version cannot install pandas on Windows

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.

#62637 In pandas-dev/pandas;

· xldistance opened on Oct 9, 2025

BUG: read_csv with pyarrow engine cannot handle single-line CSV files

Arrowpyarrow functionalitypyarrow functionality

Bug

IO CSVread_csv, to_csvread_csv, to_csv

Status: Open.

#62635 In pandas-dev/pandas;

· jorisvandenbossche opened on Oct 9, 2025

CI: New python-dev build causes errors in test-cases

CIContinuous IntegrationContinuous Integration

Status: Open.

#62629 In pandas-dev/pandas;

· eicchen opened on Oct 8, 2025

BUG: incorrect string parsing leads to segfault

Bug

IO CSVread_csv, to_csvread_csv, to_csv

SegfaultNon-Recoverable ErrorNon-Recoverable Error

Status: Open.

#62617 In pandas-dev/pandas;

· leolavaur opened on Oct 7, 2025

BUG: Drop duplicates bug when using pyarrow (version 21.0.0) backend

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.

#62611 In pandas-dev/pandas;

· flori-ko opened on Oct 7, 2025

BUG: <code>pandas.date_range()</code> raises <code>NonExistentTimeError</code> despite <code>nonexistent="shift_forward"</code> when crossing DST boundaries

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.

#62602 In pandas-dev/pandas;

· msobhyy10 opened on Oct 6, 2025

BUG: <code>DataFrame.resample()</code> fails across DST transitions with <code>NonExistentTimeError</code> in timezone-aware 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.

#62601 In pandas-dev/pandas;

· msobhyy10 opened on Oct 6, 2025

BUG: Multiplying a series of strings with a boolean different for arrow vs. python

Bug

Numeric OperationsArithmetic, Comparison, and Logical operationsArithmetic, Comparison, and Logical operations

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

Status: Open.

#62595 In pandas-dev/pandas;

· Dr-Irv opened on Oct 6, 2025

· 

3.0

BUG: In main, <code>pd.Series(show_counts=False)</code> is broken

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.

#62590 In pandas-dev/pandas;

· Dr-Irv opened on Oct 5, 2025

DOC: <code>class TextFileReader</code> not documented as a class

Docs

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

Status: Open.

#62574 In pandas-dev/pandas;

· cmp0xff opened on Oct 4, 2025

ENH: Adding an empty level at the end of a multi index

Enhancement

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

Status: Open.

#62558 In pandas-dev/pandas;

· HichemAK opened on Oct 3, 2025

BUG: Inconsistent runtime typing for Index[num] * list[timestamp]

Bug

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

IndexRelated to the Index class or subclassesRelated to the Index class or subclasses

Numeric OperationsArithmetic, Comparison, and Logical operationsArithmetic, Comparison, and Logical operations

Status: Open.

#62524 In pandas-dev/pandas;

· cmp0xff opened on Sep 30, 2025