Hi, I'm pleased to announce the availability of the first release candidate of Pandas 0.18.0. Please try this RC and report any issues here: Pandas Issues <https://github.com/pydata/pandas/issues> We will be releasing officially in 1-2 weeks or so. **RELEASE CANDIDATE 1** This is a major release from 0.17.1 and includes a small number of API changes, several new features, enhancements, and performance improvements along with a large number of bug fixes. We recommend that all users upgrade to this version. Highlights include: - pandas >= 0.18.0 will no longer support compatibility with Python version 2.6 GH7718 <https://github.com/pydata/pandas/issues/7718> or version 3.3 GH11273 <https://github.com/pydata/pandas/issues/11273> - Moving and expanding window functions are now methods on Series and DataFrame similar to .groupby like objects, see here <http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html#whatsnew-0180-...> . - Adding support for a RangeIndex as a specialized form of the Int64Index for memory savings, see here <http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html#whatsnew-0180-...> . - API breaking .resample changes to make it more .groupby like, see here <http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html#whatsnew-0180-...> - Removal of support for positional indexing with floats, which was deprecated since 0.14.0. This will now raise a TypeError, see here <http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html#whatsnew-0180-...> - The .to_xarray() function has been added for compatibility with the xarray package <http://xarray.pydata.org/en/stable/> see here <http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html#whatsnew-0180-...> . - Addition of the .str.extractall() method <http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html#whatsnew-0180-...>, and API changes to the the .str.extract() method <http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html#whatsnew-0180-...>, and the .str.cat() method <http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html#whatsnew-0180-...> - pd.test() top-level nose test runner is available GH4327 <https://github.com/pydata/pandas/issues/4327> See the Whatsnew <http://pandas-docs.github.io/pandas-docs-travis/whatsnew.html> for much more information. Best way to get this is to install via conda <http://pandas-docs.github.io/pandas-docs-travis/install.html#installing-pand...> from our development channel. Builds for osx-64,linux-64,win-64 for Python 2.7 and Python 3.5 are all available. conda install pandas=v0.18.0rc1 -c pandas Thanks to all who made this release happen. It is a very large release! Jeff