ANN: Pandas 0.23.0 Released

Hi all,

I'm happy to announce that pandas 0.23.0 has been released. This is a major
release from 0.22.0 and includes a number of API changes, new features,
enhancements, and performance improvements along with a large number of bug
fixes.

Tom
------------------------------

*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 0.23.0 release include:*

   - Round-trippable JSON format with 'table' orient
   <https://pandas.pydata.org/pandas-docs/version/0.23.0/whatsnew.html#json-read-write-round-trippable-with-orient-table>
   - Instantiation from dicts respects order for Python 3.6+
   <https://pandas.pydata.org/pandas-docs/version/0.23.0/whatsnew.html#instantation-from-dicts-preserves-dict-insertion-order-for-python-3-6>
   - Dependent column arguments for assign
   <https://pandas.pydata.org/pandas-docs/version/0.23.0/whatsnew.html#assign-accepts-dependent-arguments>
   - Merging / sorting on a combination of columns and index levels
   <https://pandas.pydata.org/pandas-docs/version/0.23.0/whatsnew.html#merging-on-a-combination-of-columns-and-index-levels>
   - Extending Pandas with custom types
   <https://pandas.pydata.org/pandas-docs/version/0.23.0/whatsnew.html#extending-pandas-with-custom-types-experimental>
   - Excluding unobserved categories from groupby
   <https://pandas.pydata.org/pandas-docs/version/0.23.0/whatsnew.html#categorical-groupers-has-gained-an-observed-keyword>

See the full whatsnew
<https://pandas.pydata.org/pandas-docs/version/0.23.0/whatsnew.html#v0-23-0>
for a list of all the changes.

*How to get it*:

Source tarballs and 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 available on conda-forge and will be available on the
default channel shortly.

*Thanks to all the contributors:*

A total of 328 people contributed to this release. People with a “+†by
their names contributed a patch for the first time.

* Aaron Critchley
* AbdealiJK +
* Adam Hooper +
* Albert Villanova del Moral
* Alejandro Giacometti +
* Alejandro Hohmann +
* Alex Rychyk
* Alexander Buchkovsky
* Alexander Lenail +
* Alexander Michael Schade
* Aly Sivji +
* Andreas Költringer +
* Andrew
* Andrew Bui +
* András Novoszáth +
* Andy Craze +
* Andy R. Terrel
* Anh Le +
* Anil Kumar Pallekonda +
* Antoine Pitrou +
* Antonio Linde +
* Antonio Molina +
* Antonio Quinonez +
* Armin Varshokar +
* Artem Bogachev +
* Avi Sen +
* Azeez Oluwafemi +
* Ben Auffarth +
* Bernhard Thiel +
* Bhavesh Poddar +
* BielStela +
* Blair +
* Bob Haffner
* Brett Naul +
* Brock Mendel
* Bryce Guinta +
* Carlos Eduardo Moreira dos Santos +
* Carlos García Márquez +
* Carol Willing
* Cheuk Ting Ho +
* Chitrank Dixit +
* Chris
* Chris Burr +
* Chris Catalfo +
* Chris Mazzullo
* Christian Chwala +
* Cihan Ceyhan +
* Clemens Brunner
* Colin +
* Cornelius Riemenschneider
* Crystal Gong +
* DaanVanHauwermeiren
* Dan Dixey +
* Daniel Frank +
* Daniel Garrido +
* Daniel Sakuma +
* DataOmbudsman +
* Dave Hirschfeld
* Dave Lewis +
* David Adrián Cañones Castellano +
* David Arcos +
* David C Hall +
* David Fischer
* David Hoese +
* David Lutz +
* David Polo +
* David Stansby
* Dennis Kamau +
* Dillon Niederhut
* Dimitri +
* Dr. Irv
* Dror Atariah
* Eric Chea +
* Eric Kisslinger
* Eric O. LEBIGOT (EOL) +
* FAN-GOD +
* Fabian Retkowski +
* Fer Sar +
* Gabriel de Maeztu +
* Gianpaolo Macario +
* Giftlin Rajaiah
* Gilberto Olimpio +
* Gina +
* Gjelt +
* Graham Inggs +
* Grant Roch
* Grant Smith +
* Grzegorz Konefał +
* Guilherme Beltramini
* HagaiHargil +
* Hamish Pitkeathly +
* Hammad Mashkoor +
* Hannah Ferchland +
* Hans
* Haochen Wu +
* Hissashi Rocha +
* Iain Barr +
* Ibrahim Sharaf ElDen +
* Ignasi Fosch +
* Igor Conrado Alves de Lima +
* Igor Shelvinskyi +
* Imanflow +
* Ingolf Becker
* Israel Saeta Pérez
* Iva Koevska +
* Jakub Nowacki +
* Jan F-F +
* Jan Koch +
* Jan Werkmann
* Janelle Zoutkamp +
* Jason Bandlow +
* Jaume Bonet +
* Jay Alammar +
* Jeff Reback
* JennaVergeynst
* Jimmy Woo +
* Jing Qiang Goh +
* Joachim Wagner +
* Joan Martin Miralles +
* Joel Nothman
* Joeun Park +
* John Cant +
* Johnny Metz +
* Jon Mease
* Jonas Schulze +
* Jongwony +
* Jordi Contestí +
* Joris Van den Bossche
* José F. R. Fonseca +
* Jovixe +
* Julio Martinez +
* Jörg Döpfert
* KOBAYASHI Ittoku +
* Kate Surta +
* Kenneth +
* Kevin Kuhl
* Kevin Sheppard
* Krzysztof Chomski
* Ksenia +
* Ksenia Bobrova +
* Kunal Gosar +
* Kurtis Kerstein +
* Kyle Barron +
* Laksh Arora +
* Laurens Geffert +
* Leif Walsh
* Liam Marshall +
* Liam3851 +
* Licht Takeuchi
* Liudmila +
* Ludovico Russo +
* Mabel Villalba +
* Manan Pal Singh +
* Manraj Singh
* Marc +
* Marc Garcia
* Marco Hemken +
* Maria del Mar Bibiloni +
* Mario Corchero +
* Mark Woodbridge +
* Martin Journois +
* Mason Gallo +
* Matias Heikkilä +
* Matt Braymer-Hayes
* Matt Kirk +
* Matt Maybeno +
* Matthew Kirk +
* Matthew Rocklin +
* Matthew Roeschke
* Matthias Bussonnier +
* Max Mikhaylov +
* Maxim Veksler +
* Maximilian Roos
* Maximiliano Greco +
* Michael Penkov
* Michael Röttger +
* Michael Selik +
* Michael Waskom
* Mie~~~
* Mike Kutzma +
* Ming Li +
* Mitar +
* Mitch Negus +
* Montana Low +
* Moritz Münst +
* Mortada Mehyar
* Myles Braithwaite +
* Nate Yoder
* Nicholas Ursa +
* Nick Chmura
* Nikos Karagiannakis +
* Nipun Sadvilkar +
* Nis Martensen +
* Noah +
* Noémi Éltető +
* Olivier Bilodeau +
* Ondrej Kokes +
* Onno Eberhard +
* Paul Ganssle +
* Paul Mannino +
* Paul Reidy
* Paulo Roberto de Oliveira Castro +
* Pepe Flores +
* Peter Hoffmann
* Phil Ngo +
* Pietro Battiston
* Pranav Suri +
* Priyanka Ojha +
* Pulkit Maloo +
* README Bot +
* Ray Bell +
* Riccardo Magliocchetti +
* Ridhwan Luthra +
* Robert Meyer
* Robin
* Robin Kiplang'at +
* Rohan Pandit +
* Rok Mihevc +
* Rouz Azari
* Ryszard T. Kaleta +
* Sam Cohan
* Sam Foo
* Samir Musali +
* Samuel Sinayoko +
* Sangwoong Yoon
* SarahJessica +
* Sharad Vijalapuram +
* Shubham Chaudhary +
* SiYoungOh +
* Sietse Brouwer
* Simone Basso +
* Stefania Delprete +
* Stefano Cianciulli +
* Stephen Childs +
* StephenVoland +
* Stijn Van Hoey +
* Sven
* Talitha Pumar +
* Tarbo Fukazawa +
* Ted Petrou +
* Thomas A Caswell
* Tim Hoffmann +
* Tim Swast
* Tom Augspurger
* Tommy +
* Tulio Casagrande +
* Tushar Gupta +
* Tushar Mittal +
* Upkar Lidder +
* Victor Villas +
* Vince W +
* Vinícius Figueiredo +
* Vipin Kumar +
* WBare
* Wenhuan +
* Wes Turner
* William Ayd
* Wilson Lin +
* Xbar
* Yaroslav Halchenko
* Yee Mey
* Yeongseon Choe +
* Yian +
* Yimeng Zhang
* ZhuBaohe +
* Zihao Zhao +
* adatasetaday +
* akielbowicz +
* akosel +
* alinde1 +
* amuta +
* bolkedebruin
* cbertinato
* cgohlke
* charlie0389 +
* chris-b1
* csfarkas +
* dajcs +
* deflatSOCO +
* derestle-htwg
* discort
* dmanikowski-reef +
* donK23 +
* elrubio +
* fivemok +
* fjdiod
* fjetter +
* froessler +
* gabrielclow
* gfyoung
* ghasemnaddaf
* h-vetinari +
* himanshu awasthi +
* ignamv +
* jayfoad +
* jazzmuesli +
* jbrockmendel
* jen w +
* jjames34 +
* joaoavf +
* joders +
* jschendel
* juan huguet +
* l736x +
* luzpaz +
* mdeboc +
* miguelmorin +
* miker985
* miquelcamprodon +
* orereta +
* ottiP +
* peterpanmj +
* rafarui +
* raph-m +
* readyready15728 +
* rmihael +
* samghelms +
* scriptomation +
* sfoo +
* stefansimik +
* stonebig
* tmnhat2001 +
* tomneep +
* topper-123
* tv3141 +
* verakai +
* xpvpc +
* zhanghui +

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