What's new in 1.5.1 (October ??, 2022)

These are the changes in pandas 1.5.1. See :ref:`release` for a full changelog including other versions of pandas.

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Fixed regressions

Fixed Regression in :meth:`Series.__setitem__` casting None to NaN for object dtype (:issue:`48665`)
Fixed Regression in :meth:`DataFrame.loc` when setting values as a :class:`DataFrame` with all True indexer (:issue:`48701`)
Regression in :func:`.read_csv` causing an EmptyDataError when using an UTF-8 file handle that was already read from (:issue:`48646`)
Fixed performance regression in :func:`factorize` when na_sentinel is not None and sort=False (:issue:`48620`)

Bug fixes

Bug in :meth:`DataFrame.to_hdf` raising AssertionError with boolean index (:issue:`48667`)

Other

Contributors