All pull requests

Pull requests

• BUG: fix string regex operations with Python unicode escape sequence

  #1623·xirafa opened Oct 20, 2026·

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• [backport 3.1.x] BUG: iloc setitem wrote the wrong cells on a Copy-on-Write referenced frame (GH#65446) (#68643)

  #1622·xirafa opened Oct 20, 2026·

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• Backport PR #66828 on branch 3.1.x (BUG: tz_convert/tz_localize failing or silently wrong with a ZoneInfo built by from_file (GH#64379))

  #1621·xirafa opened Oct 20, 2026·

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  4

• BUG: fix df.shift(freq='D') raising NotImplementedError on empty DataFrame (#71188)

  #1620·xirafa opened Oct 20, 2026·

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• BUG: read_csv(engine="pyarrow") silently ignored encoding_errors for bytes input (GH#71298)

  #1619·xirafa opened Oct 20, 2026·

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• TST: Cover assert_series_equal with NumPy masked array input

  #1618·xirafa opened Oct 20, 2026·

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• BUG: to_json and then read_json goes wrong for categories created by the cut operation

  #1617·xirafa opened Oct 20, 2026·

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  3

• BUG: fix tz-aware Timestamps with year outside 1-9999 corrupted in datetime64 storage

  #1616·xirafa opened Oct 20, 2026·

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  4

• Backport PR #71175 on branch 3.1.x (DOC: add version notes for filter parameters)

  #1615·xirafa opened Oct 20, 2026·

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• BUG: DataFrame.loc with a list of partial tuples on a MultiIndex (GH#16083)

  #1614·xirafa opened Oct 20, 2026·

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• BUG: in-place ops upcast when other has labels not in self (GH#12755)

  #1613·xirafa opened Oct 19, 2026·

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• BUG: read_html and other readers fail on URLs with non-ASCII characters (GH#21499)

  #1612·xirafa opened Oct 19, 2026·

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  1

• TST: groupby rolling with sort=False keeps group order (GH 50296)

  #1611·xirafa opened Oct 19, 2026·

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• ENH: warn when to_json/to_xml compression is ignored without a path (GH#32326)

  #1610·xirafa opened Oct 19, 2026·

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• BUG: DataFrame.dropna subset with partial MultiIndex key (GH#17737)

  #1609·xirafa opened Oct 19, 2026·

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• BUG: MultiIndex with NaN sorted last treated as unsorted (GH#17931)

  #1608·xirafa opened Oct 19, 2026·

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• ENH: accept os.PathLike for archive_name in zip/tar compression (GH#31934)

  #1607·xirafa opened Oct 19, 2026·

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• BUG: flat Index x MultiIndex join dropping unmatched keys (GH#34292)

  #1606·xirafa opened Oct 19, 2026·

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  3

• ENH: support na_rep=None in to_csv (GH#60423)

  #1605·xirafa opened Oct 19, 2026·

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• BUG: resample closed="right" bins misaligned for multiples of anchored freqs (GH#17898)

  #1604·xirafa opened Oct 19, 2026·

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  1

• ENH: escape non-printable characters in quoted reprs (GH#14579)

  #1603·xirafa opened Oct 19, 2026·

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• BUG: DataFrame.join with a list upcasting kept columns (GH#28269)

  #1602·xirafa opened Oct 19, 2026·

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• BUG: skip NA in object-dtype sum/prod/cumulative ops instead of filling (GH#59764)

  #1601·xirafa opened Oct 19, 2026·

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• DEPR: integer keys of converters/dtype/na_values as positions among columns read (GH#18566)

  #1600·xirafa opened Oct 19, 2026·

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  3

• DEPR: compound (structured) dtypes in DataFrame columns, Index, pd.array and astype (GH#49388)

  #1599·xirafa opened Oct 19, 2026·

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  3