Mailman 3 October 2016 - Pandas-dev

Our own GitHub organization?
by Wes McKinney Oct. 13, 2016

Oct. 13, 2016

We've occasionally discussed moving pandas and associated repos to a dedicated GitHub organization. Some arguments for moving to our own org: - More clear what repositories are part of the "pandas" umbrella (we can potentially formalize this in the pandas-governance repo) - Dedicated capacity from CI services - Easier for us to more clearly develop our own open source project branding independent from PyData (which has increasingly primarily become a conference / meetup brand) While I haven't had any success contacting the owner of github.com/pandas, if we can pick a suitable org name we might consider it. GitHub's route forwarding (including git remotes) makes org changes pretty painless these days Thoughts? - Wes

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A dedicated place for pandas 2.0 pull requests and code reviews?
by Wes McKinney Oct. 12, 2016

Oct. 12, 2016

hi folks We have https://github.com/pydata/pandas-design already, but: I'm starting to get to work on some prototyping: https://github.com/wesm/pandas/tree/pandas-2.0 Rather than clutter up pydata/pandas with the PRs, code reviews, and occasionally unstable builds for this, I'm thinking of creating pydata/pandas2 (a new repo, but the same git repository as pydata/pandas) and putting up PRs there, and Gerrit code reviews (going to try out gerrithub.io -- I want a lot of scrutiny on this code). Does this sound like a good idea? This will also help others who want to engage in the pandas 2.0 process but not the pandas day-to-day grind. When I reach some checkpoints where design feedback is necessary to move forward I can make some noise there. Going to be mostly essential C++ plumbing (memory management, array reference counting, views, etc.) for the next few weeks. Let me know what you all think. As an aside, as I've started working on this, it's reasonably clear that we're going to want to commit to the copy-on-write path pretty early in the process. Luckily I don't think this is very hard once you can easily determine when there is array data sharing. We may want to explore that topic in some detail in the design docs Thanks Wes

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ANN: pandas v0.19.0 released
by Joris Van den Bossche Oct. 3, 2016

Oct. 3, 2016

Hi all, I'm happy to announce pandas 0.19.0 has been released. This is a major release from 0.18.1 and includes a number of API changes, several new features, enhancements, and performance improvements along with a large number of bug fixes. See the Whatsnew <http://pandas.pydata.org/pandas-docs/version/0.19.0/whatsnew.html> file for more information. We recommend that all users upgrade to this version. This is the work of 5 months of development by 117 contributors. A big thank you to all contributors! Joris --- *What is it:* pandas is a Python package providing fast, flexible, and expressive data structures designed to make working with “relational” or “labeled” data both easy and intuitive. It aims to be the fundamental high-level building block for doing practical, real world data analysis in Python. Additionally, it has the broader goal of becoming the most powerful and flexible open source data analysis / manipulation tool available in any language. *Highlights of the 0.19.0 release include:* - New method merge_asof for asof-style time-series joining, see here <http://pandas.pydata.org/pandas-docs/version/0.19.0/whatsnew.html#whatsnew-…> - The .rolling() method is now time-series aware, see here <http://pandas.pydata.org/pandas-docs/version/0.19.0/whatsnew.html#whatsnew-…> - read_csv now supports parsing Categorical data, see here <http://pandas.pydata.org/pandas-docs/version/0.19.0/whatsnew.html#whatsnew-…> - A function union_categorical has been added for combining categoricals, see here <http://pandas.pydata.org/pandas-docs/version/0.19.0/whatsnew.html#whatsnew-…> - PeriodIndex now has its own period dtype, and changed to be more consistent with other Index classes. See here <http://pandas.pydata.org/pandas-docs/version/0.19.0/whatsnew.html#whatsnew-…> - Sparse data structures gained enhanced support of int and bool dtypes, see here <http://pandas.pydata.org/pandas-docs/version/0.19.0/whatsnew.html#whatsnew-…> - Comparison operations with Series no longer ignores the index, see here <http://pandas.pydata.org/pandas-docs/version/0.19.0/whatsnew.html#whatsnew-…> for an overview of the API changes. - Introduction of a pandas development API for utility functions, see here <http://pandas.pydata.org/pandas-docs/version/0.19.0/whatsnew.html#whatsnew-…> . - Deprecation of Panel4D and PanelND. We recommend to represent these types of n-dimensional data with the xarray package <http://xarray.pydata.org/en/stable/>. - Removal of the previously deprecated modules pandas.io.data, pandas.io.wb, pandas.tools.rplot. See the Whatsnew <http://pandas.pydata.org/pandas-docs/version/0.19.0/whatsnew.html> file for more information. *How to get it:* Source tarballs and windows/mac/linux wheels are available on PyPI (thanks to Christoph Gohlke for the windows wheels, and to Matthew Brett for setting up the mac/linux wheels). Conda packages are already available via the conda-forge channel (conda install pandas -c conda-forge). It will be available on the main channel shortly. *Issues:* Please report any issues on our issue tracker: https://github.com/pydata/pandas/issues *Thanks to all the contributors:* - adneu - Adrien Emery - agraboso - Alex Alekseyev - Alex Vig - Allen Riddell - Amol - Amol Agrawal - Andy R. Terrel - Anthonios Partheniou - babakkeyvani - Ben Kandel - Bob Baxley - Brett Rosen - c123w - Camilo Cota - Chris - chris-b1 - Chris Grinolds - Christian Hudon - Christopher C. Aycock - Chris Warth - cmazzullo - conquistador1492 - cr3 - Daniel Siladji - Douglas McNeil - Drewrey Lupton - dsm054 - Eduardo Blancas Reyes - Elliot Marsden - Evan Wright - Felix Marczinowski - Francis T. O’Donovan - Gábor Lipták - Geraint Duck - gfyoung - Giacomo Ferroni - Grant Roch - Haleemur Ali - harshul1610 - Hassan Shamim - iamsimha - Iulius Curt - Ivan Nazarov - jackieleng - Jeff Reback - Jeffrey Gerard - Jenn Olsen - Jim Crist - Joe Jevnik - John Evans - John Freeman - John Liekezer - Johnny Gill - John W. O’Brien - John Zwinck - Jordan Erenrich - Joris Van den Bossche - Josh Howes - Jozef Brandys - Kamil Sindi - Ka Wo Chen - Kerby Shedden - Kernc - Kevin Sheppard - Matthieu Brucher - Maximilian Roos - Michael Scherer - Mike Graham - Mortada Mehyar - mpuels - Muhammad Haseeb Tariq - Nate George - Neil Parley - Nicolas Bonnotte - OXPHOS - Pan Deng / Zora - Paul - Pauli Virtanen - Paul Mestemaker - Pawel Kordek - Pietro Battiston - pijucha - Piotr Jucha - priyankjain - Ravi Kumar Nimmi - Robert Gieseke - Robert Kern - Roger Thomas - Roy Keyes - Russell Smith - Sahil Dua - Sanjiv Lobo - Sašo Stanovnik - Shawn Heide - sinhrks - Sinhrks - Stephen Kappel - Steve Choi - Stewart Henderson - Sudarshan Konge - Thomas A Caswell - Tom Augspurger - Tom Bird - Uwe Hoffmann - wcwagner - WillAyd - Xiang Zhang - Yadunandan - Yaroslav Halchenko - YG-Riku - Yuichiro Kaneko - yui-knk - zhangjinjie - znmean - 颜发才（Yan Facai）

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