diff --git a/doc/source/release.rst b/doc/source/release.rst index 0298eda2c78ab..aea6280a490d6 100644 --- a/doc/source/release.rst +++ b/doc/source/release.rst @@ -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 + +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 ` overview for further explanation +of all the places in the library this affects. + pandas 0.21.1 ------------- diff --git a/doc/source/whatsnew/v0.22.0.txt b/doc/source/whatsnew/v0.22.0.txt index 8617aa6c03e1f..da4acd99e3873 100644 --- a/doc/source/whatsnew/v0.22.0.txt +++ b/doc/source/whatsnew/v0.22.0.txt @@ -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