v2.0.2.rst

What's new in 2.0.2 (May 29, 2023)

These are the changes in pandas 2.0.2. See :ref:`release` for a full changelog including other versions of pandas.

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Fixed regressions

• Fixed performance regression in :meth:`GroupBy.apply` (:issue:`53195`)
• Fixed regression in :func:`merge` on Windows when dtype is np.intc (:issue:`52451`)
• Fixed regression in :func:`read_sql` dropping columns with duplicated column names (:issue:`53117`)
• Fixed regression in :meth:`DataFrame.loc` losing :class:`MultiIndex` name when enlarging object (:issue:`53053`)
• Fixed regression in :meth:`DataFrame.to_string` printing a backslash at the end of the first row of data, instead of headers, when the DataFrame doesn't fit the line width (:issue:`53054`)
• Fixed regression in :meth:`MultiIndex.join` returning levels in wrong order (:issue:`53093`)

Bug fixes

• Bug in :class:`.arrays.ArrowExtensionArray` incorrectly assigning dict instead of list for .type with pyarrow.map_ and raising a NotImplementedError with pyarrow.struct (:issue:`53328`)
• Bug in :func:`api.interchange.from_dataframe` was raising IndexError on empty categorical data (:issue:`53077`)
• Bug in :func:`api.interchange.from_dataframe` was returning :class:`DataFrame`'s of incorrect sizes when called on slices (:issue:`52824`)
• Bug in :func:`api.interchange.from_dataframe` was unnecessarily raising on bitmasks (:issue:`49888`)
• Bug in :func:`merge` when merging on datetime columns on different resolutions (:issue:`53200`)
• Bug in :func:`read_csv` raising OverflowError for engine="pyarrow" and parse_dates set (:issue:`53295`)
• Bug in :func:`to_datetime` was inferring format to contain "%H" instead of "%I" if date contained "AM" / "PM" tokens (:issue:`53147`)
• Bug in :meth:`DataFrame.convert_dtypes` ignores convert_* keywords when set to False dtype_backend="pyarrow" (:issue:`52872`)
• Bug in :meth:`DataFrame.convert_dtypes` losing timezone for tz-aware dtypes and dtype_backend="pyarrow" (:issue:`53382`)
• Bug in :meth:`DataFrame.sort_values` raising for PyArrow dictionary dtype (:issue:`53232`)
• Bug in :meth:`Series.describe` treating pyarrow-backed timestamps and timedeltas as categorical data (:issue:`53001`)
• Bug in :meth:`Series.rename` not making a lazy copy when Copy-on-Write is enabled when a scalar is passed to it (:issue:`52450`)
• Bug in :meth:`pd.array` raising for NumPy array and pa.large_string or pa.large_binary (:issue:`52590`)
• Bug in :meth:`DataFrame.__getitem__` not preserving dtypes for :class:`MultiIndex` partial keys (:issue:`51895`)

Other

• Raised a better error message when calling :func:`Series.dt.to_pydatetime` with :class:`ArrowDtype` with pyarrow.date32 or pyarrow.date64 type (:issue:`52812`)

Contributors

.. contributors:: v2.0.1..v2.0.2|HEAD