Search results

BUG: inconsistency with missing values comparison

Bug

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

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

Status: Open.

#63328 In pandas-dev/pandas;

· lbraglia opened on Dec 11, 2025

BUG: pd.col does not support & for combining conditions in .loc

Bug

expressionspd.eval, query, pd.colpd.eval, query, pd.col

Status: Open.

#63322 In pandas-dev/pandas;

· mattharrison opened on Dec 11, 2025

·  

3.0

BUG: Division results in 0 values for large dfs with numpy==2.3.5

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.

#63320 In pandas-dev/pandas;

· tilyevsky12 opened on Dec 10, 2025

BUG: <code>DataFrame.apply(axis='columns')</code> loses pyarrow-backed dtypes / does not preserve dtype_backend

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

Bug

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

pyarrow dtype retentionop with pyarrow dtype -> expect pyarrow resultop with pyarrow dtype -> expect pyarrow result

Status: Open.

#63317 In pandas-dev/pandas;

· mattharrison opened on Dec 9, 2025

BUG: large pivot_table has incorrect output with Python 3.14

Bug

Python 3.14

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

Status: Open.

#63314 In pandas-dev/pandas;

· joshuanapoli opened on Dec 9, 2025

·  

3.0

BUG: Inconsistent behavior for <code>step</code> with slice for label-based indexing

Docs

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

Status: Open.

#63311 In pandas-dev/pandas;

· ianhi opened on Dec 9, 2025

BUG: Series stealing references from CategoricalIndex is invalid for read-only arrays

Bug

Copy / view semantics

Status: Open.

#63306 In pandas-dev/pandas;

· vyasr opened on Dec 9, 2025

·  

3.0

BUG(pandas 3.0 regression): <code>drop(index=...)</code> doesn't accept NA values when using arrow dtype in index

Arrowpyarrow functionalitypyarrow functionality

Bug

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

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

Status: Open.

#63304 In pandas-dev/pandas;

· tswast opened on Dec 8, 2025

·  

3.0

ENH: Persian date

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.

#63299 In pandas-dev/pandas;

· ShimaBeiranvand opened on Dec 8, 2025

DOC: Improve text for "Migrating to Copy-on-Write"

Docs

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

Status: Open.

#63298 In pandas-dev/pandas;

· behrenhoff opened on Dec 8, 2025

DOC: update the DataFrame.copy() docstring to current state with CoW

Copy / view semantics

Docs

Status: Open.

#63289 In pandas-dev/pandas;

· jorisvandenbossche opened on Dec 7, 2025

·  

3.0

BUG: Adding pyarrow column to missing column changes to NaN in DataFrame addition

Arrowpyarrow functionalitypyarrow functionality

Bug

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

Status: Open.

#63288 In pandas-dev/pandas;

· mattharrison opened on Dec 6, 2025