These are the changes in pandas 1.1.5. See :ref:`release` for a full changelog including other versions of pandas.
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- Fixed regression in addition of a timedelta-like scalar to a :class:`DatetimeIndex` raising incorrectly (:issue:`37295`)
- Fixed regression in :meth:`Series.groupby` raising when the :class:`Index` of the :class:`Series` had a tuple as its name (:issue:`37755`)
- Fixed regression in :meth:`DataFrame.loc` and :meth:`Series.loc` for
__setitem__when one-dimensional tuple was given to select from :class:`MultiIndex` (:issue:`37711`) - Fixed regression in inplace operations on :class:`Series` with
ExtensionDtypewith NumPy dtyped operand (:issue:`37910`) - Fixed regression in metadata propagation for
groupbyiterator (:issue:`37343`) - Fixed regression in indexing on a :class:`Series` with
CategoricalDtypeafter unpickling (:issue:`37631`) - Fixed regression in
df.groupby(..).rolling(..)with the resulting :class:`MultiIndex` when grouping by a label that is in the index (:issue:`37641`) - Fixed regression in :meth:`DataFrame.fillna` not filling
NaNafter other operations such as :meth:`DataFrame.pivot` (:issue:`36495`).
- Bug in pytables methods in python 3.9 (:issue:`38041`)
- Only set
-Werroras a compiler flag in the CI jobs (:issue:`33315`, :issue:`33314`)
.. contributors:: v1.1.4..v1.1.5|HEAD