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Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more
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Pandas v1.2.1

Pandas: v1.2.1 Release

Release date:
January 20, 2021
Previous version:
v1.2.0 (released December 26, 2020)
Magnitude:
2,138 Diff Delta
Contributors:
5 total committers
Data confidence:
Commits:
52 impacting commits

52 Commits in this Release

Ordered by the degree to which they evolved the repo in this version.

Backport PR #39239: DEPR: raise deprecation warning in numpy ufuncs on DataFrames if not aligned + fallback to <1.2.0 behaviour (#39288)
Authored January 20, 2021
Backport PR #39202 on branch 1.2.x (#39255)
Authored January 18, 2021
Backport PR #39188: REGR: Different results from DataFrame.apply and str accessor (#39199)
Authored January 16, 2021
Backport PR #39235: Revert "Inconsistent indexes for tick label plotting (#28733)" (#39252)
Authored January 18, 2021
Backport PR #38344: CI: Move sql builds from Travis to Github actions (#38734)
Authored December 28, 2020
Backport PR #38649: BUG: Fix regression for groupby.indices in case of unused categories (#38790)
Authored December 30, 2020
Backport PR #38728: REGR: to_csv created corrupt ZIP files when chunksize<rows (#38767)
Authored December 29, 2020
Backport PR #38789: BUG: Fix precise_xstrtod segfault on long exponent (#38828)
Authored December 30, 2020
Backport PR #38997: REGR: errors='replace' when encoding/errors are not specified (#39021)
Authored January 7, 2021
Backport PR #38737: BUG/REG: RollingGroupby MultiIndex levels dropped (#38784)
Authored December 31, 2020
Backport PR #38816: REGR: groupby.sem with nuisance columns (#38838)
Authored December 31, 2020
Backport PR #39191: Revert "BUG/REG: RollingGroupby MultiIndex levels dropped (#38737)" (#39198)
Authored January 16, 2021
Backport PR #38759: BUG: float-like string, trailing 0 truncation (#38769)
Authored December 29, 2020
Backport PR #39023: Fix regression in setitem when expanding DataFrame with specific column name format (#39032)
Authored January 8, 2021
Backport PR #39253: REGR: codecs.open() is always opened in text mode (#39271)
Authored January 19, 2021
Backport PR #39071: Regression in loc.setitem raising ValueError with unordered MultiIndex columns and scalar indexer (#39084)
Authored January 11, 2021
Backport PR #38723: BUG: inconsistency between frame.any/all with dt64 vs dt64tz (#38807)
Authored December 30, 2020
Backport PR #38740: DEPR: Hide deprecated attrs _AXIS_NAMES & _AXIS_NUMBERS (#38755)
Authored December 28, 2020
Backport PR #38819: REGR: read_excel does not work for most file handles (#38832)
Authored December 30, 2020
Backport PR #39260: REGR: fix numpy accumulate ufuncs for DataFrame (#39273)
Authored January 19, 2021
Backport PR #39029: BUG: read_csv does not close file during an error in _make_reader (#39160)
Authored January 14, 2021
Backport PR #39065: Regression in replace raising ValueError for bytes object (#39075)
Authored January 10, 2021
Backport PR #38803: BUG: avoid attribute error with pyarrow >=0.16.0 and <1.0.0 (#38971)
Authored January 5, 2021
Backport PR #39196: REGR: NaT.__richmp__(dateobj) (#39201)
Authored January 16, 2021
Backport PR #39161: Fix regression in loc setitem raising KeyError when enlarging df with multiindex (#39187)
Authored January 15, 2021
Backport PR #38909: BUG: Fixed regression in rolling.skew and rolling.kurt modifying object (#38945)
Authored January 4, 2021
Backport PR #38982: REGR: Bug fix for ExtensionArray groupby aggregation on non-numeric types (#39145)
Authored January 13, 2021
Backport PR #39156: CI: Mark network test as xfail (#39157)
Authored January 14, 2021
Backport PR #38987: Fix bug on master (#38991)
Authored January 6, 2021
Backport PR #39019: DOC: np.bool -> np.bool_ (#39020)
Authored January 7, 2021
Backport PR #39256: DOC: keep color for note admonitions in sphinx theme (#39269)
Authored January 19, 2021
Backport PR #39064: Added docs for the change of behavior of isin (#39230)
Authored January 17, 2021
Backport PR #39177: CI: Pin nbformat to 5.0.8 (#39179)
Authored January 14, 2021
Backport PR #39193: CI: Set xfail to strict=False for network tests (#39200)
Authored January 16, 2021
Backport PR #38715: CI: pin jedi version<0.18.0 (#38716)
Authored December 27, 2020
Backport PR #38841: Update conf.py to execute imports during pdf building (#38970)
Authored January 5, 2021
Backport PR #39077: Remove xlrd benchmark after xlrd was updated to 2.0.1 on conda-forge (#39078)
Authored January 10, 2021
Backport PR #39139: BUG: Placeholders not being filled on docstrings (#39231)
Authored January 17, 2021
Backport PR #38806: DOC: fix sphinx directive error in 1.2.1 release notes (#38848)
Authored December 31, 2020
Backport PR #38471: DOC: fixes for assert_frame_equal check_freq argument (#38891)
Authored January 2, 2021

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Top Contributors in v1.2.1

meeseeksmachine
twoertwein
pandas-development-team-79e2
simonjayhawkins
kylekeppler

Directory Browser for v1.2.1

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Release Notes Published

This is the first patch release in the 1.2.x series and includes some regression fixes and bug fixes. We recommend that all users upgrade to this version.

See the full whatsnew for a list of all the changes.

The release will be available on the defaults and conda-forge channels:

conda install pandas

Or via PyPI:

python3 -m pip install --upgrade pandas

Please report any issues with the release on the pandas issue tracker.

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