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Backport PR #64199 on branch 3.0.x (DOC: cleanup 3.0.1 whatsnew) (#64201)
Co-authored-by: Joris Van den Bossche <jorisvandenbossche@gmail.com>
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doc/source/whatsnew/v3.0.1.rst

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@@ -13,29 +13,28 @@ including other versions of pandas.
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Fixed regressions
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~~~~~~~~~~~~~~~~~
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- Fixed regression in :func:`read_hdf` reading a file written by pandas <= 2.2 with a datetime64 column (:issue:`64006`)
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- Fixed regression in :func:`to_timedelta` when converting a list with float and int (:issue:`64044`)
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- Fixed regression in :meth:`DataFrame.groupby` and :meth:`Series.groupby` when grouping on categorical data with NA values, ``observed=False``, and ``dropna=True`` (:issue:`52445`)
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- Fixed regression in :meth:`DataFrame.loc` when setting new row and new columns simultaneously filling existing columns with ``b''`` instead of ``NaN`` (:issue:`58316`)
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- Fixed regression in :meth:`DataFrame.reindex` when using a string fill value (:issue:`63993`)
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- Fixed regression in comparing a string column or index with a :py:class:`range` object (:issue:`63429`)
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- Fixed regression in comparison operation with a zero-dimensional subclass of ``np.ndarray`` (:issue:`63205`)
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- Fixed regression in the :class:`DataFrame` and :meth:`DataFrame.from_records` constructor with a list of dicts with a missing value indicator as key (:issue:`63889`)
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- Fixed regression when calling ``numpy.random``'s ``permutation()`` on a (pyarrow-backed) string :class:`Series` (:issue:`63935`)
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- Fixed regression where :meth:`Series.str.contains` and :meth:`Series.str.replace` on pyarrow-backed strings rejected RE2 unicode escapes like ``\x{...}`` and ``\p{...}`` (:issue:`63901`)
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- Fixed regression where methods such as :meth:`Series.str.contains` and :meth:`Series.str.replace` on pyarrow-backed strings rejected RE2 unicode escapes like ``\x{...}`` and ``\p{...}`` (:issue:`63901`)
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.. ---------------------------------------------------------------------------
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.. _whatsnew_301.bugs:
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Bug fixes
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^^^^^^^^^
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- Fixed a bug for comparison operators between :py:class:`range` and objects with :class:`StringDtype` with ``storage="pyarrow"`` (:issue:`63429`)
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- Fixed a bug in the :class:`DataFrame` constructor when passed a :class:`Series` or
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:class:`Index` correctly handling Copy-on-Write (:issue:`63899`)
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- Added additional typing aliases in :py:mod:`pandas.api.typing.aliases` (:issue:`64098`)
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- Allow :class:`.ExtensionArray` to have dtypes involving :class:`numpy.void` (:issue:`54810`)
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- Fixed a bug in :func:`col` where unary operators (``-``, ``+``, ``abs``) were not supported (:issue:`63939`)
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- Fixed a bug in the :func:`comparison_op` raising a ``TypeError`` for zerodim
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subclasses of ``np.ndarray`` (:issue:`63205`)
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- Added additional typing aliases in :py:mod:`pandas.api.typing.aliases` (:issue:`64098`)
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- Fixed bug in :func:`merge` where NaN values in pyarrow-backed string dtype join keys were incorrectly matched with non-NaN values on Windows with pyarrow 21 (:issue:`64060`)
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- Fixed bug in :func:`read_hdf` reading a file written by pandas <= 2.2 with a datetime64 column (:issue:`64006`)
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- Fixed bug in :meth:`DataFrame.loc` when setting new row and new columns simultaneously filling existing columns with ``b''`` instead of ``NaN`` (:issue:`58316`)
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- Fixed thread safety issues in :class:`DataFrame` internals on the free-threaded build (:issue:`63685`).
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- Prevent buffer overflow in :meth:`Rolling.corr` and :meth:`Rolling.cov` with variable windows when passing ``other`` with a longer index than the original window. This now raises ``ValueError`` (:issue:`62937`)
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