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Dec 29, 2017
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DOC: 0.22.0 release docs #18983

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21 changes: 21 additions & 0 deletions doc/source/release.rst
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Expand Up @@ -37,6 +37,27 @@ analysis / manipulation tool available in any language.
* Binary installers on PyPI: http://pypi.python.org/pypi/pandas
* Documentation: http://pandas.pydata.org

pandas 0.22.0
-------------

**Release date:** December 29, 2017
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I've set the release date as today. We'll update it if that slips at all.


This is a major release from 0.21.1 and includes a single, API-breaking change.
We recommend that all users upgrade to this version after carefully reading the
release note.

The only changes are:

- The sum of an empty or all-*NA* ``Series`` is now ``0``
- The product of an empty or all-*NA* ``Series`` is now ``1``
- We've added a ``min_count`` parameter to ``.sum()`` and ``.prod()`` controlling
the minimum number of valid values for the result to be valid. If fewer than
``min_count`` non-*NA* values are present, the result is *NA*. The default is
``0``. To return ``NaN``, the 0.21 behavior, use ``min_count=1``.

See the :ref:`v0.22.0 Whatsnew <whatsnew_0220>` overview for further explanation
of all the places in the library this affects.

pandas 0.21.1
-------------

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4 changes: 2 additions & 2 deletions doc/source/whatsnew/v0.22.0.txt
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@@ -1,7 +1,7 @@
.. _whatsnew_0220:

v0.22.0
-------
v0.22.0 (December 29, 2017)
---------------------------

This is a major release from 0.21.1 and includes a single, API-breaking change.
We recommend that all users upgrade to this version after carefully reading the
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