v1.1.3.rst

What's new in 1.1.3 (October 5, 2020)

These are the changes in pandas 1.1.3. See :ref:`release` for a full changelog including other versions of pandas.

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Enhancements

Added support for new Python version

pandas 1.1.3 now supports Python 3.9 (:issue:`36296`).

Development Changes

• The minimum version of Cython is now the most recent bug-fix version (0.29.21) (:issue:`36296`).

Fixed regressions

• Fixed regression in :meth:`DataFrame.agg`, :meth:`DataFrame.apply`, :meth:`Series.agg`, and :meth:`Series.apply` where internal suffix is exposed to the users when no relabelling is applied (:issue:`36189`)
• Fixed regression in :class:`IntegerArray` unary plus and minus operations raising a TypeError (:issue:`36063`)
• Fixed regression when adding a :meth:`timedelta_range` to a :class:`Timestamp` raised a ValueError (:issue:`35897`)
• Fixed regression in :meth:`Series.__getitem__` incorrectly raising when the input was a tuple (:issue:`35534`)
• Fixed regression in :meth:`Series.__getitem__` incorrectly raising when the input was a frozenset (:issue:`35747`)
• Fixed regression in modulo of :class:`Index`, :class:`Series` and :class:`DataFrame` using numexpr using C not Python semantics (:issue:`36047`, :issue:`36526`)
• Fixed regression in :meth:`read_excel` with engine="odf" caused UnboundLocalError in some cases where cells had nested child nodes (:issue:`36122`, :issue:`35802`)
• Fixed regression in :meth:`DataFrame.replace` inconsistent replace when using a float in the replace method (:issue:`35376`)
• Fixed regression in :meth:`Series.loc` on a :class:`Series` with a :class:`MultiIndex` containing :class:`Timestamp` raising InvalidIndexError (:issue:`35858`)
• Fixed regression in :class:`DataFrame` and :class:`Series` comparisons between numeric arrays and strings (:issue:`35700`, :issue:`36377`)
• Fixed regression in :meth:`DataFrame.apply` with raw=True and user-function returning string (:issue:`35940`)
• Fixed regression when setting empty :class:`DataFrame` column to a :class:`Series` in preserving name of index in frame (:issue:`36527`)
• Fixed regression in :class:`Period` incorrect value for ordinal over the maximum timestamp (:issue:`36430`)
• Fixed regression in :func:`read_table` raised ValueError when delim_whitespace was set to True (:issue:`35958`)
• Fixed regression in :meth:`Series.dt.normalize` when normalizing pre-epoch dates the result was shifted one day (:issue:`36294`)

Bug fixes

• Bug in :func:`read_spss` where passing a pathlib.Path as path would raise a TypeError (:issue:`33666`)
• Bug in :meth:`Series.str.startswith` and :meth:`Series.str.endswith` with category dtype not propagating na parameter (:issue:`36241`)
• Bug in :class:`Series` constructor where integer overflow would occur for sufficiently large scalar inputs when an index was provided (:issue:`36291`)
• Bug in :meth:`DataFrame.sort_values` raising an AttributeError when sorting on a key that casts column to categorical dtype (:issue:`36383`)
• Bug in :meth:`DataFrame.stack` raising a ValueError when stacking :class:`MultiIndex` columns based on position when the levels had duplicate names (:issue:`36353`)
• Bug in :meth:`Series.astype` showing too much precision when casting from np.float32 to string dtype (:issue:`36451`)
• Bug in :meth:`Series.isin` and :meth:`DataFrame.isin` when using NaN and a row length above 1,000,000 (:issue:`22205`)
• Bug in :func:`cut` raising a ValueError when passed a :class:`Series` of labels with ordered=False (:issue:`36603`)

Other

• Reverted enhancement added in pandas-1.1.0 where :func:`timedelta_range` infers a frequency when passed start, stop, and periods (:issue:`32377`)

Contributors

.. contributors:: v1.1.2..v1.1.3