v1.0.4.rst

What's new in 1.0.4 (May 28, 2020)

These are the changes in pandas 1.0.4. See :ref:`release` for a full changelog including other versions of pandas.

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Fixed regressions

• Fix regression where :meth:`Series.isna` and :meth:`DataFrame.isna` would raise for categorical dtype when pandas.options.mode.use_inf_as_na was set to True (:issue:`33594`)
• Fix regression in :meth:`GroupBy.first` and :meth:`GroupBy.last` where None is not preserved in object dtype (:issue:`32800`)
• Fix regression in DataFrame reductions using numeric_only=True and ExtensionArrays (:issue:`33256`).
• Fix performance regression in memory_usage(deep=True) for object dtype (:issue:`33012`)
• Fix regression where :meth:`Categorical.replace` would replace with NaN whenever the new value and replacement value were equal (:issue:`33288`)
• Fix regression where an ordered :class:`Categorical` containing only NaN values would raise rather than returning NaN when taking the minimum or maximum (:issue:`33450`)
• Fix regression in :meth:`DataFrameGroupBy.agg` with dictionary input losing ExtensionArray dtypes (:issue:`32194`)
• Fix to preserve the ability to index with the "nearest" method with xarray's CFTimeIndex, an :class:`Index` subclass (pydata/xarray#3751, :issue:`32905`).
• Fix regression in :meth:`DataFrame.describe` raising TypeError: unhashable type: 'dict' (:issue:`32409`)
• Fix regression in :meth:`DataFrame.replace` casts columns to object dtype if items in to_replace not in values (:issue:`32988`)
• Fix regression in :meth:`Series.groupby` would raise ValueError when grouping by :class:`PeriodIndex` level (:issue:`34010`)
• Fix regression in :meth:`GroupBy.rolling.apply` ignores args and kwargs parameters (:issue:`33433`)
• Fix regression in error message with np.min or np.max on unordered :class:`Categorical` (:issue:`33115`)
• Fix regression in :meth:`DataFrame.loc` and :meth:`Series.loc` throwing an error when a datetime64[ns, tz] value is provided (:issue:`32395`)

Bug fixes

• Bug in :meth:`SeriesGroupBy.first`, :meth:`SeriesGroupBy.last`, :meth:`SeriesGroupBy.min`, and :meth:`SeriesGroupBy.max` returning floats when applied to nullable Booleans (:issue:`33071`)
• Bug in :meth:`Rolling.min` and :meth:`Rolling.max`: Growing memory usage after multiple calls when using a fixed window (:issue:`30726`)
• Bug in :meth:`~DataFrame.to_parquet` was not raising PermissionError when writing to a private s3 bucket with invalid creds. (:issue:`27679`)
• Bug in :meth:`~DataFrame.to_csv` was silently failing when writing to an invalid s3 bucket. (:issue:`32486`)
• Bug in :meth:`read_parquet` was raising a FileNotFoundError when passed an s3 directory path. (:issue:`26388`)
• Bug in :meth:`~DataFrame.to_parquet` was throwing an AttributeError when writing a partitioned parquet file to s3 (:issue:`27596`)
• Bug in :meth:`GroupBy.quantile` causes the quantiles to be shifted when the by axis contains NaN (:issue:`33200`, :issue:`33569`)

Contributors

.. contributors:: v1.0.3..v1.0.4