All pull requests

Pull requests

• BUG: merge/join overwriting a non-key column named like the join key (GH#39192)

  BugReshaping
  #70737·jbrockmendel opened Oct 6, 2026Member·

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  1

• PERF: make ArrowExtensionArray.copy a real copy (GH#61930)

  ArrowCopy / view semanticsPerformance
  #70736·jbrockmendel opened Oct 6, 2026Member·

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  1

• BUG: merge with indicator on MultiIndex columns emits warnings (GH#49325)

  BugReshaping
  #70735·jbrockmendel opened Oct 6, 2026Member·

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  1

• BUG: DataFrame.any/all(skipna=False) raising TypeError for pyarrow columns with NA

  Awaiting Review
  #70723·maharanay22 opened Oct 6, 2026Contributor·6 of 7 tasks·

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  1

• BUG: merge key dtype depends on whether every key matches (GH#16480)

  BugDtype ConversionsReshaping
  #70722·jbrockmendel opened Oct 6, 2026Member·

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  2

• BUG: Rolling.skew/kurt stuck at NaN or inf after an extremely large value

  #70638·jbrockmendel opened Oct 6, 2026Member·5 tasks done·

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• DOC: note that groupby sort=True raises on unsortable keys (GH#57525)

  DocsGroupby
  #70627·jbrockmendel opened Oct 6, 2026Member·

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  1

• ENH: resolve ambiguous DST results of round/floor/ceil from the original timestamp (GH#37592)

  EnhancementNeeds DiscussionTimezones
  #70625·jbrockmendel opened Oct 6, 2026Member·

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  · 3.2
  1

• ENH: add sum/prod/mean/median/std/var/sem/skew/kurt to Index (GH#50021)

  EnhancementIndexNeeds DiscussionReduction Operations
  #70622·jbrockmendel opened Oct 6, 2026Member·

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  1

• BUG: read_csv(engine="pyarrow") raised EmptyDataError for a single line without a trailing newline (GH#62635)

  ArrowBugIO CSV
  #70593·jbrockmendel opened Oct 6, 2026Member·

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  · 3.2
  1

• BUG: string slicing of non-nanosecond DatetimeIndex outside nanosecond range

  Awaiting Review
  #70577·PDGGK opened Oct 6, 2026·5 of 8 tasks·

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  1

  1

• BUG: pivot_table raises with aggfunc="size" and margins=True

  Awaiting Review
  #70576·fabiovincenzi opened Oct 6, 2026·6 of 8 tasks·

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  1

• BUG: DataFrame.eval assigning to a backtick-quoted name used the cleaned identifier as the column label

  Awaiting Review
  #70575·taekop opened Oct 6, 2026·6 of 8 tasks·

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  1

• ENH: Implement series.argsort(order=, stable=)

  Needs Issue Assignment
  #70574·yushiyangk opened Oct 6, 2026Contributor·6 of 7 tasks·

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  1

  1

• BUG: spurious RuntimeWarning concatenating MultiIndex with unorderable level values (GH#61477)

  BugMultiIndexWarnings
  #70566·jbrockmendel opened Oct 6, 2026Member·

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  · 3.2
  1

• BUG: where/mask with a list other misaligned on datetimelike columns

  #70533·jbrockmendel opened Oct 5, 2026Member·5 tasks done·

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• DOC: show how to skip missing labels in MultiIndex list selection (GH#49206)

  DocsIndexingMultiIndex
  #70521·jbrockmendel opened Oct 5, 2026Member·

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  1

• DEPR: negative min_count in reductions (GH#50022)

  DeprecateGroupbyReduction Operations
  #70520·jbrockmendel opened Oct 5, 2026Member·

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  1

  1

• BUG: MultiIndex.loc partial key ignored later levels for np.datetime64 on a date level (GH#55969)

  BugIndexingMultiIndex
  #70510·jbrockmendel opened Oct 5, 2026Member·

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  · 3.2
  1

• BUG: Categorical.map with unhashable results (GH#40892, GH#54359)

  ApplyBugCategoricalNested Data
  #70508·jbrockmendel opened Oct 5, 2026Member·

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  · 3.2
  2

• BUG: inaccurate float32 std/var with bottleneck installed (GH#22385)

  BugReduction Operations
  #70501·jbrockmendel opened Oct 5, 2026Member·

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  · 3.2
  1

• BUG: Index.copy treating name as a list of names (GH#19171)

  BugIndex
  #70499·jbrockmendel opened Oct 5, 2026Member·

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  · 3.2
  1

• BUG: to_sql dropped fractional seconds on MySQL/MariaDB (GH#48435)

  BugIO SQL
  #70494·jbrockmendel opened Oct 5, 2026Member·

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  · 3.2
  1

• BUG: spurious fragmentation PerformanceWarning from wide dict/list agg (GH#61628)

  ApplyBugGroupbyWarnings
  #70492·jbrockmendel opened Oct 5, 2026Member·

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  · 3.2
  1

• BUG: keep scatter colors unchanged when adding a colorbar for constant c

  Awaiting Review
  #70483·saitejapadakandla opened Oct 5, 2026·

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  1