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BUG: Missing explicit libm dependency in meson.build causes undefined symbol errors

Bug

BuildLibrary building on various platformsLibrary building on various platforms

Status: Open.

#63640 In pandas-dev/pandas;

· BwL1289 opened on Jan 11, 2026

CI: Consider usage of scipy_doctest

CIContinuous IntegrationContinuous Integration

Docs

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

Status: Open.

#63633 In pandas-dev/pandas;

· rhshadrach opened on Jan 10, 2026

BUG: Reading from CSV files with mixed numbers and letters leads to Segmentation Fault

Bug

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

IO CSVread_csv, to_csvread_csv, to_csv

Status: Open.

#63630 In pandas-dev/pandas;

· asddfl opened on Jan 10, 2026

DOC: document BaseMaskedDtype.from_numpy_dtype

Docs

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

Status: Open.

#63608 In pandas-dev/pandas;

· flying-sheep opened on Jan 8, 2026

DOC: Improve flow of '10 minutes to pandas' by adding an intro to the Merge section

Docs

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

Status: Open.

#63592 In pandas-dev/pandas;

· Saikrishna-dev-oss opened on Jan 6, 2026

BUG: iloc[0] raises ValueError with SparseArray column and numpy array column

Bug

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

SparseSparse Data TypeSparse Data Type

Status: Open.

#63581 In pandas-dev/pandas;

· rpadaki opened on Jan 6, 2026

BUG: pd.read_sql returns fewer rows than manual cursor execution for the same query and connection

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.

#63574 In pandas-dev/pandas;

· ayazurrashid opened on Jan 5, 2026

BUG: pd.read_json fails with "Value is too big!" on large integers, while json.load + DataFrame works

Bug

IO JSONread_json, to_json, json_normalizeread_json, to_json, json_normalize

Status: Open.

#63572 In pandas-dev/pandas;

· wongzhenhao opened on Jan 5, 2026

DEPR: Series.round and Series.clip on non-numeric and non-object dtypes

DeprecateFunctionality to remove in pandasFunctionality to remove in pandas

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

SeriesSeries data structureSeries data structure

Transformationse.g. cumsum, diff, ranke.g. cumsum, diff, rank

Status: Open.

#63559 In pandas-dev/pandas;

· rhshadrach opened on Jan 3, 2026

ENH: Decay-weighted rolling aggregations with defined behavior for duplicate timestamps

Enhancement

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

Windowrolling, ewma, expandingrolling, ewma, expanding

Status: Open.

#63551 In pandas-dev/pandas;

· vkverma9534 opened on Jan 3, 2026

BUG: PyArrow-backed datetime index missing numpy-like attributes

Arrowpyarrow functionalitypyarrow functionality

Bug

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

Status: Open.

#63527 In pandas-dev/pandas;

· mattharrison opened on Dec 31, 2025

BUG: <code>.loc</code> slicing fails on PyArrow-backed date index

Arrowpyarrow functionalitypyarrow functionality

Bug

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

Status: Open.

#63526 In pandas-dev/pandas;

· mattharrison opened on Dec 31, 2025