1 Release published by 1 person

• v2.3.1 Pandas 2.3.1

  published Jul 7, 2025

37 Pull requests merged by 12 people

• [pre-commit.ci] pre-commit autoupdate

  #61802 merged Jul 7, 2025

• REF: remove unreachable, stronger typing in parsers.pyx

  #61785 merged Jul 7, 2025

• Backport PR #61794 on branch 2.3.x (DOC: prepare 2.3.1 whatsnew notes for release)

  #61803 merged Jul 7, 2025

• BUG: Decimal(NaN) incorrectly allowed in ArrowEA constructor with tim…

  #61773 merged Jul 7, 2025

• TST: option_context bug on Mac GH#58055

  #61779 merged Jul 7, 2025

• PERF: avoid object-dtype path in ArrowEA._explode

  #61786 merged Jul 7, 2025

• DOC: prepare 2.3.1 whatsnew notes for release

  #61794 merged Jul 7, 2025

• CLN: remove and udpate for outdated _item_cache

  #61789 merged Jul 7, 2025

• DOC: Add link to WebGL in pandas ecosystem

  #61790 merged Jul 7, 2025

• [backport 2.3.x] BUG[string]: incorrect index downcast in DataFrame.join (#61771)

  #61800 merged Jul 7, 2025

• [backport 2.3.x] TST: update expected dtype for sum of decimals with pyarrow 21+ (#61799)

  #61801 merged Jul 7, 2025

• TST: update expected dtype for sum of decimals with pyarrow 21+

  #61799 merged Jul 7, 2025

• Backport PR #61795 on branch 2.3.x (DOC: add section about upcoming pandas 3.0 changes (string dtype, CoW) to 2.3 whatsnew notes)

  #61798 merged Jul 7, 2025

• BUG[string]: incorrect index downcast in DataFrame.join

  #61771 merged Jul 7, 2025

• Backport PR #61770 on branch 2.3.x (BUG: Fix unpickling of string dtypes of legacy pandas versions)

  #61793 merged Jul 7, 2025

• DOC: add section about upcoming pandas 3.0 changes (string dtype, CoW) to 2.3 whatsnew notes

  #61795 merged Jul 7, 2025

• Backport PR #61705 on branch 2.3.x (DOC: add pandas 3.0 migration guide for the string dtype)

  #61797 merged Jul 7, 2025

• DOC: add pandas 3.0 migration guide for the string dtype

  #61705 merged Jul 7, 2025

• BUG: Fix unpickling of string dtypes of legacy pandas versions

  #61770 merged Jul 7, 2025

• BUG: NA.__and__, __or__, __xor__ with np.bool_ objects

  #61768 merged Jul 3, 2025

• Revert "ENH: Allow third-party packages to register IO engines"

  #61767 merged Jul 3, 2025

• ENH: Allow third-party packages to register IO engines

  #61642 merged Jul 3, 2025

• DEPR: object inference in to_stata

  #56536 merged Jul 3, 2025

• [backport 2.3.x] CI: clean up wheel build workarounds now that Cython 3.1.0 is out (#61446)

  #61752 merged Jul 3, 2025

• DEPS: bump pyarrow minimum version from 10.0 to 12.0

  #61723 merged Jul 3, 2025

• Revert "[2.3.x] DEPS: Drop Python 3.9 (#60792)"

  #61755 merged Jul 3, 2025

• BLD: Build wheels for 3.9 and musllinux-aarch64 for pandas 2.3

  #61569 merged Jul 2, 2025

• chore: remove redundant words in comment

  #61759 merged Jul 2, 2025

• TST (string dtype): resolve skip in misc test_memory_usage

  #61757 merged Jul 2, 2025

• [backport 2.3.x] TST/CI: temporary upper pin for scipy in downstream tests for compat with statsmodels (#61750)

  #61754 merged Jul 1, 2025

• DOC: Pass docstring validation for Index.infer_objects

  #61756 merged Jul 1, 2025

• BUG: Assigning boolean series with boolean indexer

  #61743 merged Jul 1, 2025

• TST/CI: temporary upper pin for scipy in downstream tests for compat with statsmodels

  #61750 merged Jul 1, 2025

• TST: fix decimal cast error message for pyarrow nightly tests

  #61749 merged Jul 1, 2025

• [backport 2.3.x] DOC: move relevant whatsnew changes from 2.3.0 to 2.3.1 file (#61698)

  #61751 merged Jul 1, 2025

• Use TypeAlias in code where types are declared

  #61504 merged Jul 1, 2025

• Backport PR #61744 on branch 2.3.x (CI: if no docstring, create error GL08 and don't validate - fix for numpydoc 1.9)

  #61745 merged Jul 1, 2025

11 Pull requests opened by 11 people

• BUG: .describe() doesn't work for EAs #61707

  #61760 opened Jul 2, 2025

• ENH: speed up wide DataFrame.line plots by using a single LineCollection

  #61764 opened Jul 3, 2025

• BUG: ensure to_numeric down-casts to uint64 for large unsigned integers

  #61766 opened Jul 3, 2025

• Improve MultiIndex label rename checks

  #61769 opened Jul 3, 2025

• CI: Add NumPy 1.26 test job

  #61774 opened Jul 3, 2025

• TST: assert reading of legacy pickles against current data

  #61792 opened Jul 7, 2025

• Bump pypa/cibuildwheel from 2.23.3 to 3.0.1

  #61796 opened Jul 7, 2025

• DOC: Improve documentation for DataFrame.__setitem__ and .loc assignment from Series

  #61804 opened Jul 7, 2025

• DOC: Improve clarity of GroupBy introduction sentence

  #61805 opened Jul 7, 2025

• DEPS: Bump NumPy and tzdata

  #61806 opened Jul 7, 2025

• CLN: remove doctest-ignores

  #61808 opened Jul 7, 2025

13 Issues closed by 5 people

• ENH: Add Coefficient of Variation to DataFrame.describe()

  #61784 closed Jul 7, 2025

• `pandas.__version__` is `2.3.0+4.g1dfc98e16a` in pandas 2.3.0 and python 3.9, not `2.3.0`

  #61579 closed Jul 7, 2025

• API/BUG: different constructor behavior for numpy vs pyarrow dt64tzs

  #61775 closed Jul 7, 2025

• BUG: TestTableSchemaRepr::test_publishes raises AttributeError on mac

  #58055 closed Jul 7, 2025

• CLN: references/tests for item_cache

  #61746 closed Jul 7, 2025

• DOC: Improve text color in dark mode for tutorial navigation buttons

  #61791 closed Jul 7, 2025

• String dtype: overview of breaking behaviour changes

  #59328 closed Jul 7, 2025

• BUG: StringDtype objects from pandas <2.3.0 cannot be reliably unpickled in 2.3.0.

  #61763 closed Jul 7, 2025

• BUG: Series.mul silently returns wrong values with `UInt8` dtype when overflowing the max value range

  #59261 closed Jul 4, 2025

• BUG: np.bool_(False) & pd.NA gives pd.NA

  #58427 closed Jul 3, 2025

• BUG: Segmentation fault when misusing `VariableWindowIndexer.get_window_bounds`

  #61753 closed Jul 2, 2025

• BUG: comparing strings of different dtypes errors in 2.3

  #61570 closed Jul 2, 2025

• BUG: Incompatible dype warning when assigning boolean series with logical indexer

  #57338 closed Jul 1, 2025

10 Issues opened by 9 people

• BUG: Pandas Series with Xarray slow print time.

  #61809 opened Jul 8, 2025

• BUG: union of MultiIndex throws exception for datetime and pd.Timestamp with identical values

  #61807 opened Jul 7, 2025

• BUG: read_excel() converts the string "None" in an Excel file to "NaN"

  #61788 opened Jul 5, 2025

• PERF: Unnecessary string interning in read_csv?

  #61783 opened Jul 5, 2025

• BUG: Errors using pyarrow datetime types on windows

  #61782 opened Jul 5, 2025

• DOC: Typo within `Series.mask()` docs - alignment is done between self and cond, not cond and other

  #61781 opened Jul 4, 2025

• BUG: tz_localize(None) with Arrow timestamp

  #61780 opened Jul 4, 2025

• BUG?: creating Categorical from pandas Index/Series with "object" dtype infers string

  #61778 opened Jul 4, 2025

• BUG: Calling dict(df.groupby(...)) raises TypeError: 'str' object is not callable despite valid inputs

  #61772 opened Jul 3, 2025

• BUG: user expected pd.isna to be False for NaNs with Float64Dtype

  #61758 opened Jul 2, 2025

60 Unresolved conversations

Sometimes conversations happen on old items that aren’t yet closed. Here is a list of all the Issues and Pull Requests with unresolved conversations.

• adding pandas.api.typing.aliases and docs

  #61735 commented on Jul 4, 2025 • 10 new comments

• BUG: Raise OutOfBoundsDatetime in DataFrame.replace when value exceeds datetime64[ns] bounds (GH#61671)

  #61717 commented on Jul 5, 2025 • 7 new comments

• BUG: Require sample weights to sum to less than 1 when replace = True

  #61582 commented on Jul 2, 2025 • 5 new comments

• Fix/devcontainer qt deps

  #61611 commented on Jul 2, 2025 • 2 new comments

• feature #49580: support new-style float_format string in to_csv

  #61650 commented on Jul 7, 2025 • 2 new comments

• Implemented NumbaExecutionEngine

  #61487 commented on Jul 6, 2025 • 2 new comments

• BUG: Fix lost precision with common type of uint64/int64

  #61679 commented on Jul 2, 2025 • 1 new comment

• POC: NA-only behavior for numpy-nullable dtypes

  #61708 commented on Jul 7, 2025 • 1 new comment

• BUG: Fix pivot_table margins to include NaN groups when dropna=False

  #61524 commented on Jul 1, 2025 • 1 new comment

• ENH: Add `force_suffixes` boolean argument to `pd.merge`

  #61498 commented on Jul 2, 2025 • 0 new comments

• BUG: Fix assert_frame_equal dtype handling when check_dtype=False (#61473)

  #61525 commented on Jul 4, 2025 • 0 new comments

• ENH: Implement translations infrastructure

  #61380 commented on Jul 2, 2025 • 0 new comments

• DOC: Remove and Update out of date Docker Image issue with #61511

  #61550 commented on Jul 5, 2025 • 0 new comments

• [WIP] ENH: support reading directory in read_csv

  #61275 commented on Jul 4, 2025 • 0 new comments

• Parallelize test_sql.py - Issue #60378

  #61551 commented on Jul 8, 2025 • 0 new comments

• DOC: Add note on inference behavior of apply with result_type='expand'

  #61552 commented on Jul 7, 2025 • 0 new comments

• ENH, DOC: Add JupyterLite-powered interactive examples for the `pandas` documentation

  #61061 commented on Jul 7, 2025 • 0 new comments

• TST: Added script to enforce usage of match argument for tm.assert_produces_warning

  #59173 commented on Jul 8, 2025 • 0 new comments

• DOC: Show constructor arguments for some classes in `pd.series.offsets`

  #61605 commented on Jul 4, 2025 • 0 new comments

• BUG: Fix infer_dtype result for float with embedded pd.NA

  #61624 commented on Jul 3, 2025 • 0 new comments

• BUG: Fix GroupBy aggregate coersion of outputs inconsistency for pyarrow dtypes

  #61640 commented on Jul 2, 2025 • 0 new comments

• BUG: to_numeric fails to convert a Pyarrow Decimal series containing NA values

  #61659 commented on Jul 2, 2025 • 0 new comments

• BUG/TST: added TypeError if object dtypes are detected in dataframe

  #61682 commented on Jul 7, 2025 • 0 new comments

• POC: PDEP16 default to masked nullable dtypes

  #61716 commented on Jul 7, 2025 • 0 new comments

• CI: add PyPI Trusted-Publishing “publish” job to wheels workflow (#61669)

  #61718 commented on Jul 8, 2025 • 0 new comments

• String dtype: turn on by default

  #61722 commented on Jul 3, 2025 • 0 new comments

• DOC: add sections about big new features (CoW, string dtype) to 3.0.0 whatsnew notes

  #61724 commented on Jul 1, 2025 • 0 new comments

• TST[string]: update expecteds for using_string_dtype to fix xfails

  #61727 commented on Jul 7, 2025 • 0 new comments

• POC: consistent NaN treatment for pyarrow dtypes

  #61732 commented on Jul 7, 2025 • 0 new comments

• BUG: Fix assert_frame_equal with check_dtype=False for pd.NA dtype differences (GH#61473)

  #61748 commented on Jul 1, 2025 • 0 new comments

• CI Failures due to new scipy and new numpydoc

  #61740 commented on Jul 1, 2025 • 0 new comments

• Removal of members from pandas-triage team

  #61734 commented on Jul 1, 2025 • 0 new comments

• ENH: Decimal year

  #60391 commented on Jul 1, 2025 • 0 new comments

• BUG: Converting string of type lxml.etree._ElementUnicodeResult to a datetime using pandas.to_datetime results in a TypeError.

  #60933 commented on Jul 1, 2025 • 0 new comments

• BUG: set_index with pyarrow timestamp type does not produce DatetimeIndex

  #60561 commented on Jul 1, 2025 • 0 new comments

• PERF: Arrow dtypes are much slower than Numpy for DataFrame.apply

  #61747 commented on Jul 1, 2025 • 0 new comments

• ENH: read_csv tz option

  #61535 commented on Jul 1, 2025 • 0 new comments

• ENH: add option to save json without escaping forward slashes

  #61442 commented on Jul 1, 2025 • 0 new comments

• ENH: generic `save` and `read` methods for DataFrame

  #60786 commented on Jul 1, 2025 • 0 new comments

• Moving to PyArrow dtypes by default

  #61618 commented on Jul 1, 2025 • 0 new comments

• BUG: `to_numeric` fails to convert a Pyarrow Decimal series containing NA values.

  #61641 commented on Jul 2, 2025 • 0 new comments

• BUG: DataFrameGroupBy.__getitem__ fails with tuples on multi-level column objects

  #58282 commented on Jul 2, 2025 • 0 new comments

• BUG: incompatible dtype when creating bool column with df.at

  #56600 commented on Jul 2, 2025 • 0 new comments

• ENH: Replacing behavior currently provided by pandas.to_numeric using errors="ignore"

  #59221 commented on Jul 2, 2025 • 0 new comments

• ENH: Restore the functionality of `.fillna`

  #59831 commented on Jul 2, 2025 • 0 new comments

• BUG: Incorrect logical operation between pandas dataframe and series

  #60204 commented on Jul 2, 2025 • 0 new comments

• BUG/API: preserve dtype in Index `append()`

  #60159 commented on Jul 2, 2025 • 0 new comments

• DEPR: List of deprecations to be removed in 4.0

  #56596 commented on Jul 3, 2025 • 0 new comments

• BUG: "Python int too large" in maybe_convert_objects with numpy 1.26

  #60023 commented on Jul 3, 2025 • 0 new comments

• VOTE: Voting issue for PDEP-15: Reject adding PyArrow as a required dependency

  #61596 commented on Jul 3, 2025 • 0 new comments

• Request for guidance on issues for upcoming PyData Yerevan pandas sprint

  #61347 commented on Jul 4, 2025 • 0 new comments

• BUG: pyarrow stripping leading zeros with dtype=str

  #57666 commented on Jul 4, 2025 • 0 new comments

• BUG: `read_csv()` : inconsistent dtype and content parsing.

  #61730 commented on Jul 5, 2025 • 0 new comments

• ENH: read_xml() does not allow to specify huge_tree=True for the 'lxml' parser.

  #61290 commented on Jul 6, 2025 • 0 new comments

• BUG: Large XML files on Windows trigger false Encoding error

  #59447 commented on Jul 6, 2025 • 0 new comments

• TRACKER: new default String dtype (pyarrow-backed, numpy NaN semantics)

  #54792 commented on Jul 7, 2025 • 0 new comments

• BUG (string dtype): logical operation with bool and string failing

  #60234 commented on Jul 7, 2025 • 0 new comments

• DOC: https://pandas.pydata.org/pandas-docs/version/2.3 does not work

  #61721 commented on Jul 7, 2025 • 0 new comments

• RLS: 2.3.1

  #61590 commented on Jul 7, 2025 • 0 new comments

• PDEP-15: Reject PDEP-10

  #58623 commented on Jul 1, 2025 • 0 new comments