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Copy file name to clipboardExpand all lines: doc/source/whatsnew/v1.1.0.rst
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.. _whatsnew_110:
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What's new in 1.1.0 (??)
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------------------------
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What's new in 1.1.0 (July 28, 2020)
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-----------------------------------
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These are the changes in pandas 1.1.0. See :ref:`release` for a full changelog
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including other versions of pandas.
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- Bug in :meth:`Series.__getitem__` indexing with non-standard scalars, e.g. ``np.dtype`` (:issue:`32684`)
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- Bug in :class:`Index` constructor where an unhelpful error message was raised for NumPy scalars (:issue:`33017`)
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- Bug in :meth:`DataFrame.lookup` incorrectly raising an ``AttributeError`` when ``frame.index`` or ``frame.columns`` is not unique; this will now raise a ``ValueError`` with a helpful error message (:issue:`33041`)
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- Bug in :meth:`DataFrame.iloc.__setitem__` creating a new array instead of overwriting ``Categorical`` values in-place (:issue:`32831`)
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- Bug in :class:`Interval` where a :class:`Timedelta` could not be added or subtracted from a :class:`Timestamp` interval (:issue:`32023`)
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- Bug in :meth:`DataFrame.copy` not invalidating _item_cache after copy caused post-copy value updates to not be reflected (:issue:`31784`)
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- Fixed regression in :meth:`DataFrame.loc` and :meth:`Series.loc` throwing an error when a ``datetime64[ns, tz]`` value is provided (:issue:`32395`)
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- Bug in :meth:`Series.loc` when used with a :class:`MultiIndex` would raise an ``IndexingError`` when accessing a ``None`` value (:issue:`34318`)
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- Bug in :meth:`DataFrame.reset_index` and :meth:`Series.reset_index` would not preserve data types on an empty :class:`DataFrame` or :class:`Series` with a :class:`MultiIndex` (:issue:`19602`)
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- Bug in :class:`Series` and :class:`DataFrame` indexing with a ``time`` key on a :class:`DatetimeIndex` with ``NaT`` entries (:issue:`35114`)
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- Bug in :meth:`Index.get_indexer_non_unique` when index contains multiple ``np.nan`` (:issue:`35392`)
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