What’s new in 1.4.4 (July ??, 2022)

These are the changes in pandas 1.4.4. See Release notes for a full changelog including other versions of pandas.

Fixed regressions

• Fixed regression in DataFrame.fillna() not working DataFrame with MultiIndex (GH47649)

• Fixed regression in taking NULL objects from a DataFrame causing a segmentation violation. These NULL values are created by numpy.empty_like() (GH46848)

• Fixed regression in concat() materializing Index during sorting even if Index was already sorted (GH47501)

• Fixed regression in calling bitwise numpy ufuncs (for example, np.bitwise_and) on Index objects (GH46769)

• Fixed regression in cut() using a datetime64 IntervalIndex as bins (GH46218)

• Fixed regression in DataFrame.select_dtypes() where include="number" included BooleanDtype (GH46870)

• Fixed regression in DataFrame.loc() raising error when indexing with a NamedTuple (GH48124)

• Fixed regression in DataFrame.loc() not updating the cache correctly after values were set (GH47867)

• Fixed regression in DataFrame.loc() not aligning index in some cases when setting a DataFrame (GH47578)

• Fixed regression in DataFrame.loc() setting a length-1 array like value to a single value in the DataFrame (GH46268)

• Fixed regression when slicing with DataFrame.loc() with DateOffset-index (GH46671)

• Fixed regression in setting None or non-string value into a string-dtype Series using a mask (GH47628)

• Fixed regression in DataFrame.select_dtypes() returning a view on the original DataFrame (GH48090)

• Fixed regression using custom Index subclasses (for example, used in xarray) with reset_index() or Index.insert() (GH47071)

• Fixed regression in DatetimeIndex.intersection() when the DatetimeIndex has dates crossing daylight savings time (GH46702)

• Fixed regression in merge() throwing an error when passing a Series with a multi-level name (GH47946)

• Fixed regression in DataFrame.eval() creating a copy when updating inplace (GH47449)

Bug fixes

• The errors.FutureWarning raised when passing arguments (other than filepath_or_buffer) as positional in read_csv() is now raised at the correct stacklevel (GH47385)

• Bug in DataFrame.to_sql() when method was a callable that did not return an int and would raise a TypeError (GH46891)

• Bug in DataFrameGroupBy.value_counts() where subset had no effect (GH44267)

• Bug in loc.__getitem__() with a list of keys causing an internal inconsistency that could lead to a disconnect between frame.at[x, y] vs frame[y].loc[x] (GH22372)

• Bug in the Series.dt.strftime() accessor return a float instead of object dtype Series for all-NaT input, which also causes a spurious deprecation warning (GH45858)

Other

• The minimum version of Cython needed to compile pandas is now 0.29.32 (GH47978)

Contributors

A total of 268 people contributed patches to this release. People with a “+” by their names contributed a patch for the first time.

• Aadharsh Acharya +

• Aadharsh-Acharya +

• Aadhi Manivannan +

• Adam Bowden

• Aditya Agarwal +

• Ahmed Ibrahim +

• Alastair Porter +

• Alex Povel +

• Alex-Blade

• Alexandra Sciocchetti +

• AlonMenczer +

• Andras Deak +

• Andrew Hawyrluk

• Andy Grigg +

• Aneta Kahleová +

• Anthony Givans +

• Anton Shevtsov +

• B. J. Potter +

• BarkotBeyene +

• Ben Beasley +

• Ben Wozniak +

• Bernhard Wagner +

• Boris Rumyantsev

• Brian Gollop +

• CCXXXI +

• Chandrasekaran Anirudh Bhardwaj +

• Charles Blackmon-Luca +

• Chris Moradi +

• ChrisAlbertsen +

• Compro Prasad +

• DaPy15

• Damian Barabonkov +

• Daniel I +

• Daniel Isaac +

• Daniel Schmidt

• Danil Iashchenko +

• Dare Adewumi

• Dennis Chukwunta +

• Dennis J. Gray +

• Derek Sharp +

• Dhruv Samdani +

• Dimitra Karadima +

• Dmitry Savostyanov +

• Dmytro Litvinov +

• Do Young Kim +

• Dries Schaumont +

• Edward Huang +

• Eirik +

• Ekaterina +

• Eli Dourado +

• Ezra Brauner +

• Fabian Gabel +

• FactorizeD +

• Fangchen Li

• Francesco Romandini +

• Greg Gandenberger +

• Guo Ci +

• Hiroaki Ogasawara

• Hood Chatham +

• Ian Alexander Joiner +

• Irv Lustig

• Ivan Ng +

• JHM Darbyshire

• JHM Darbyshire (MBP)

• JHM Darbyshire (iMac)

• JMBurley

• Jack Goldsmith +

• James Freeman +

• James Lamb

• James Moro +

• Janosh Riebesell

• Jarrod Millman

• Jason Jia +

• Jeff Reback

• Jeremy Tuloup +

• Johannes Mueller

• John Bencina +

• John Mantios +

• John Zangwill

• Jon Bramley +

• Jonas Haag

• Jordan Hicks

• Joris Van den Bossche

• Jose Ortiz +

• JosephParampathu +

• José Duarte

• Julian Steger +

• Kai Priester +

• Kapil E. Iyer +

• Karthik Velayutham +

• Kashif Khan

• Kazuki Igeta +

• Kevin Jan Anker +

• Khor Chean Wei

• Kian Eliasi

• Kian S +

• Kim, KwonHyun +

• Kinza-Raza +

• Konjeti Maruthi +

• Leonardus Chen

• Linxiao Francis Cong +

• Loïc Estève

• LucasG0 +

• Lucy Jiménez +

• Luis Pinto

• Luke Manley

• Marc Garcia

• Marco Edward Gorelli

• Marco Gorelli

• MarcoGorelli

• Margarete Dippel +

• Mariam-ke +

• Martin Fleischmann

• Marvin John Walter +

• Marvin Walter +

• Mateusz

• Matilda M +

• Matthew Roeschke

• Matthias Bussonnier

• Mehgarg +

• Melissa Weber Mendonça +

• Michael Milton +

• Michael Wang

• Mike McCarty +

• Miloni Atal +

• Mitlasóczki Bence +

• Moritz Schreiber +

• Morten Canth Hels +

• Nick Crews +

• NickFillot +

• Nicolas Hug +

• Nima Sarang +

• Noa Tamir +

• Pandas Development Team

• Parfait Gasana

• Parthi +

• Partho +

• Patrick Hoefler

• Peter

• Peter Hawkins +

• Philipp A

• Philipp Schaefer +

• Pierrot +

• Pratik Patel +

• Prithvijit

• Purna Chandra Mansingh +

• Radoslaw Lemiec +

• Reinert Huseby Karlsen +

• Richard Shadrach

• Richard Shadrach +

• Robbie Palmer

• Robert de Vries

• Roger +

• Roger Murray +

• Ruizhe Deng +

• SELEE +

• Sachin Yadav +

• Saiwing Yeung +

• Sam Rao +

• Sandro Casagrande +

• Sebastiaan Vermeulen +

• Shaghayegh +

• Shantanu +

• Shashank Shet +

• Shawn Zhong +

• Shuangchi He +

• Simon Hawkins

• Simon Knott +

• Solomon Song +

• Somtochi Umeh +

• Stefan Krawczyk +

• Stefanie Molin

• Steffen Rehberg

• Steven Bamford +

• Steven Rotondo +

• Steven Schaerer

• Sylvain MARIE +

• Sylvain Marié

• Tarun Raghunandan Kaushik +

• Taylor Packard +

• Terji Petersen

• Thierry Moisan

• Thomas Grainger

• Thomas Hunter +

• Thomas Li

• Tim McFarland +

• Tim Swast

• Tim Yang +

• Tobias Pitters

• Tom Aarsen +

• Tom Augspurger

• Torsten Wörtwein

• TraverseTowner +

• Tyler Reddy

• Valentin Iovene

• Varun Sharma +

• Vasily Litvinov

• Venaturum

• Vinicius Akira Imaizumi +

• Vladimir Fokow +

• Wenjun Si

• Will Lachance +

• William Andrea

• Wolfgang F. Riedl +

• Xingrong Chen +

• Yago González

• Yikun Jiang +

• Yuanhao Geng

• Yuval +

• Zero

• Zhengfei Wang +

• abmyii

• alexondor +

• alm

• andjhall +

• anilbey +

• arnaudlegout +

• asv-bot +

• ateki +

• auderson +

• bherwerth +

• bicarlsen +

• carbonleakage +

• charles +

• charlogazzo +

• code-review-doctor +

• dataxerik +

• deponovo

• dimitra-karadima +

• dospix +

• ehallam +

• ehsan shirvanian +

• ember91 +

• eshirvana

• fractionalhare +

• gaotian98 +

• gesoos

• github-actions[bot]

• gunghub +

• hasan-yaman

• iansheng +

• iasoon +

• jbrockmendel

• joshuabello2550 +

• jyuv +

• kouya takahashi +

• mariana-LJ +

• matt +

• mattB1989 +

• nealxm +

• partev

• poloso +

• realead

• roib20 +

• rtpsw

• ryangilmour +

• shourya5 +

• srotondo +

• stanleycai95 +

• staticdev +

• tehunter +

• theidexisted +

• tobias.pitters +

• uncjackg +

• vernetya

• wany-oh +

• wfr +

• z3c0 +

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