Issues

• BUG: convert_dtype with dtype_backend="numpy_nullable" return an object with pyarrow storage

  ArrowBugDtype ConversionsNeeds Discussion
  pandas-dev/pandas#64238 · Filter by author arnaudlegout opened on Feb 19, 2026
  2

• BUG: read_excel with usecols still mangles column names when duplicates exist elsewhere in spreadsheet

  BugIO Excel
  pandas-dev/pandas#64198 · Filter by author arthursn opened on Feb 17, 2026
  3

• BUG: For infer_dtype skipna is ignored for Period / Interval

  Bug
  pandas-dev/pandas#64196 · Filter by author gautamvarmadatla opened on Feb 17, 2026
  10

• DEPR: Period "freq" -> "unit"

  DeprecateNeeds DiscussionPeriod
  pandas-dev/pandas#64174 · Filter by author jbrockmendel opened on Feb 16, 2026
  2

• API: Period subtraction

  API DesignNumeric OperationsPeriodTimedelta
  pandas-dev/pandas#64173 · Filter by author jbrockmendel opened on Feb 16, 2026
  5

• QST: Understanding list-like functions in transform and apply command in pandas

  ApplyDeprecateNeeds Discussion
  pandas-dev/pandas#64152 · Filter by author d-s-dc opened on Feb 14, 2026
  8

• BUG: DataFrame.unstack(0, sort=False) creates fake column names

  BugReshaping
  pandas-dev/pandas#64150 · Filter by author BaraVaq opened on Feb 14, 2026
  13

• API/BUG: support for operations with custom objects / object dtype

  Numeric Operations
  pandas-dev/pandas#64107 · Filter by author jorisvandenbossche opened on Feb 10, 2026 · 3.2
  13

• ENH: Nearest_in_time fill for time series data

  EnhancementMissing-data
  pandas-dev/pandas#64074 · Filter by author vkverma9534 opened on Feb 8, 2026
  15

• BUG: to_datetime does not recast units when passing a DatetimeIndex

  Usage Question
  pandas-dev/pandas#64012 · Filter by author jf2 opened on Feb 3, 2026
  4

• ENH: Determination of result "flavor" when based on multiple input flavors

  Dtype ConversionsEnhancement
  pandas-dev/pandas#64005 · Filter by author rhshadrach opened on Feb 3, 2026 · 4.0
  4

• BUG: Odd behavior of Index.searchsorted

  BugCross-Dtype Numerical StabilityDtype Conversions
  pandas-dev/pandas#63938 · Filter by author bilichboris opened on Jan 29, 2026
  13

  

• BUG: string regex operation with unicode escape sequence failing

  ArrowRegressionStrings
  pandas-dev/pandas#63901 · Filter by author jorisvandenbossche opened on Jan 27, 2026 · 3.0.6
  4

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

  BugWindow
  pandas-dev/pandas#63855 · Filter by author loicdiridollou opened on Jan 24, 2026
  7

• BUG: DataFrame[StringDtype].where(DataFrame[bool], list[str]) returns object type instead of StringDtype.

  BugStrings
  pandas-dev/pandas#63842 · Filter by author mroeschke opened on Jan 24, 2026 · 3.1
  1

• RLS: 3.0.x releases

  Release
  pandas-dev/pandas#63833 · Filter by author mroeschke opened on Jan 23, 2026 · 3.0.6
  11

• BUG: read_excel with pyarrow backend does not infer correct data type with mixed values inside column

  ArrowBugIO Excel
  pandas-dev/pandas#63830 · Filter by author Gawaboumga opened on Jan 23, 2026 · 3.1
  10

  

• BUG: inferred_freq is infers the wrong freq 2BQS-OCT instead of 2BQS-JAN

  BugFrequency
  pandas-dev/pandas#63791 · Filter by author MMCMA opened on Jan 21, 2026
  11

  

• BUG: rolling on time-based index wrongly

  BugNeeds Triage
  pandas-dev/pandas#63769 · Filter by author jh-wu opened on Jan 20, 2026
  4

• BUG: inconsistent date string conversion leads to large downstream performance degradation.

  BugNeeds Triage
  pandas-dev/pandas#63757 · Filter by author etiennemlb opened on Jan 19, 2026
  7

• BUG: Inconsistent NaN detection based on Series dtype, to_numeric dtype_backend, None vs np.nan, strings in orig list

  BugNeeds Triage
  pandas-dev/pandas#63732 · Filter by author B-D-T opened on Jan 18, 2026
  13

• ENH: read_excel function fill merged_area content with left top cell content

  EnhancementIO ExcelNeeds Discussion
  pandas-dev/pandas#63684 · Filter by author pokq opened on Jan 14, 2026
  9

• String dtype: differences in regex operations because of engine (Python vs RE2)

  API - ConsistencyStrings
  pandas-dev/pandas#63683 · Filter by author jorisvandenbossche opened on Jan 14, 2026 · 3.2
  8

• CI: Consider usage of scipy_doctest

  CIDocsNeeds Discussion
  pandas-dev/pandas#63633 · Filter by author rhshadrach opened on Jan 10, 2026
  4

• DOC: document BaseMaskedDtype.from_numpy_dtype

  DocsNeeds Discussion
  pandas-dev/pandas#63608 · Filter by author flying-sheep opened on Jan 8, 2026
  6