22 Pull requests merged by 13 people

• 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

• TST: Refactor S3 tests

  #61703 merged Jun 30, 2025

• BUG: Fix return type of loc/iloc

  #61054 merged Jun 30, 2025

• BUG: Copy attrs on pd.merge()

  #60357 merged Jun 30, 2025

• ENH: improve optional import error message

  #61597 merged Jun 30, 2025

• BUG: to_stata erroring when encoded text and normal text have mismatched length

  #61629 merged Jun 30, 2025

• Description of pandas_datetime_exec function.

  #61635 merged Jun 30, 2025

• DOC: move relevant whatsnew changes from 2.3.0 to 2.3.1 file

  #61698 merged Jun 30, 2025

• DOC: Add missing Index.infer_objects link to API reference

  #61736 merged Jun 30, 2025

• DOC: Fix grammar in AUTHORS.md

  #61739 merged Jun 30, 2025

• CI: if no docstring, create error GL08 and don't validate - fix for numpydoc 1.9

  #61744 merged Jun 30, 2025

13 Pull requests opened by 7 people

• POC: PDEP16 default to masked nullable dtypes

  #61716 opened Jun 26, 2025

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

  #61717 opened Jun 27, 2025

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

  #61718 opened Jun 27, 2025

• String dtype: turn on by default

  #61722 opened Jun 27, 2025

• DEPS: bump pyarrow minimum version from 10.0 to 12.0

  #61723 opened Jun 27, 2025

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

  #61724 opened Jun 27, 2025

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

  #61727 opened Jun 27, 2025

• POC: consistent NaN treatment for pyarrow dtypes

  #61732 opened Jun 28, 2025

• adding pandas.api.typing.aliases and docs

  #61735 opened Jun 29, 2025

• BUG: fillna with DataFrame input should preserve dtype when possible

  #61742 opened Jun 29, 2025

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

  #61748 opened Jun 30, 2025

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

  #61752 opened Jul 1, 2025

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

  #61760 opened Jul 2, 2025

14 Issues closed by 6 people

• 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

• BUG: loc[] returns object type instead of float

  #60600 closed Jun 30, 2025

• ENH: Copy attrs on join (possibly depending on left, right, etc.)

  #60351 closed Jun 30, 2025

• Misleading error message when PyTables is not installed

  #61521 closed Jun 30, 2025

• BUG: StataWriter returns ascii error when length of string is < 2045, but encoded length is > 2045

  #61583 closed Jun 30, 2025

• DOC: Description of pandas_datetime_exec function

  #61631 closed Jun 30, 2025

• BUG: AttributeError in pandas.core.algorithms.diff when passing non-numeric types

  #61728 closed Jun 30, 2025

• DOC: Index.infer_objects is missing from docs

  #61733 closed Jun 30, 2025

• DISC: nanoarrow-backed ArrowStringArray

  #58552 closed Jun 29, 2025

• ENH: Type support for variables in `DataFrame.query()`

  #61731 closed Jun 29, 2025

• BUG: CI docstring-validation fails with AttributeError in numpydoc validate.py

  #61720 closed Jun 27, 2025

• BUG/API: floordiv by zero in Int64Dtype

  #61715 closed Jun 27, 2025

13 Issues opened by 11 people

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

  #61763 opened Jul 2, 2025

• BUG:

  #61758 opened Jul 2, 2025

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

  #61747 opened Jun 30, 2025

• CLN: references/tests for item_cache

  #61746 opened Jun 30, 2025

• CI Failures due to new scipy and new numpydoc

  #61740 opened Jun 29, 2025

• Removal of members from pandas-triage team

  #61734 opened Jun 29, 2025

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

  #61730 opened Jun 28, 2025

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

  #61721 opened Jun 27, 2025

• BUG: mapping categorical with single category to boolean returns category instead of bool dtype

  #61719 opened Jun 27, 2025

• BUG: doing df.to_parquet and then reading it with pd.read_parquet causes KeyError

  #61714 opened Jun 26, 2025

• BUG: Inconsitent behaviour for different backends due to nullable bool values

  #61713 opened Jun 26, 2025

• BUG: .round causes TypeError / NaN-

  #61712 opened Jun 26, 2025

• Writing data to mysql database using df.to_sql method gives exception

  #61711 opened Jun 26, 2025

71 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.

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

  #61705 commented on Jun 30, 2025 • 15 new comments

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

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

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

  #61650 commented on Jun 30, 2025 • 4 new comments

• BUG: Fix Index.equals between object and string

  #61541 commented on Jun 26, 2025 • 3 new comments

• Fix/devcontainer qt deps

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

• BUG: Add fillna at the beginning of _where not to fill NA. #60729

  #60772 commented on Jun 27, 2025 • 1 new comment

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

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

• ENH: Implement PDEP-17

  #61468 commented on Jun 26, 2025 • 1 new comment

• BUG: Add PyArrow datelike type support for `map()`

  #61644 commented on Jun 29, 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

• PDEP-15: Reject PDEP-10

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

• DEPR: object inference in to_stata

  #56536 commented on Jul 2, 2025 • 0 new comments

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

  #60023 commented on Jul 2, 2025 • 0 new comments

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

  #60159 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

• ENH: Restore the functionality of `.fillna`

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

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

  #59261 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

• RLS: 2.3.1

  #61590 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

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

  #58282 commented on Jul 2, 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: arithmetic between datetime.timedelta scalar and series produces timedelta64[us] instead of timedelta64[ns]

  #59656 commented on Jun 29, 2025 • 0 new comments

• [WIP] ENH: support reading directory in read_csv

  #61275 commented on Jul 3, 2025 • 0 new comments

• ENH: Implement translations infrastructure

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

• Implemented NumbaExecutionEngine

  #61487 commented on Jul 2, 2025 • 0 new comments

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

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

• ENH: Support Plugin Accessors Via Entry Points

  #61499 commented on Jun 27, 2025 • 0 new comments

• PDEP-18: Nullable Object Dtype

  #61599 commented on Jun 27, 2025 • 0 new comments

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

  #61605 commented on Jul 1, 2025 • 0 new comments

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

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

• feature #58141: Consistent naming conventions for string dtype aliases

  #61651 commented on Jun 26, 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 Jun 30, 2025 • 0 new comments

• WEB: add note to PDEP-10 about delayed timeline for requiring pyarrow

  #61706 commented on Jun 29, 2025 • 0 new comments

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

  #61708 commented on Jun 30, 2025 • 0 new comments

• BUG: Segfault on `np.maximum(series, ...)`

  #60611 commented on Jun 29, 2025 • 0 new comments

• BUG: why arrow only work on mac arm？

  #60714 commented on Jun 29, 2025 • 0 new comments

• Support for Storing and Retrieving Complex Data Types (e.g., Embeddings) in Pandas DataFrames

  #60895 commented on Jun 29, 2025 • 0 new comments

• ENH: Add an iterdicts() function

  #60901 commented on Jun 29, 2025 • 0 new comments

• ENH: Automate reading of data in chunks

  #61110 commented on Jun 29, 2025 • 0 new comments

• ENH: The method of obtaining a certain cell or slice of the dataframe is confusing and unclear

  #61232 commented on Jun 29, 2025 • 0 new comments

• ENH: Utility to return "feasible" dtype for `infer_dtype` output.

  #61256 commented on Jun 29, 2025 • 0 new comments

• ENH: The row and column indexing mechanism of your dataframe is inefficient, leading to errors and unnecessary time consumption

  #61230 commented on Jun 29, 2025 • 0 new comments

• BUG: pre-commit version 4.0.0 is required

  #61328 commented on Jun 29, 2025 • 0 new comments

• BUG: replace value failed

  #61643 commented on Jun 29, 2025 • 0 new comments

• ENH: read_xml handling of bad lines

  #59384 commented on Jun 29, 2025 • 0 new comments

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

  #61290 commented on Jun 29, 2025 • 0 new comments

• BUG: pandas read_xml with iterparse and stylesheets silently ignores stylesheets

  #58857 commented on Jun 29, 2025 • 0 new comments

• ENH: Implement `skiptrailingspace` parameter for `read_csv`

  #60813 commented on Jun 28, 2025 • 0 new comments

• FEEDBACK: PyArrow as a required dependency and PyArrow backed strings

  #54466 commented on Jun 27, 2025 • 0 new comments

• BUG: read_csv not guessing delimiter

  #47024 commented on Jun 27, 2025 • 0 new comments

• ENH: ExcelWriter append or create mode

  #61634 commented on Jun 26, 2025 • 0 new comments

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

  #54792 commented on Jul 2, 2025 • 0 new comments

• Moving to PyArrow dtypes by default

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

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

  #61596 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

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

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

• ENH: read_csv tz option

  #61535 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

• 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

• ENH: Decimal year

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

• ENH: Adding pd.from_pydantic

  #61513 commented on Jun 30, 2025 • 0 new comments

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

  #61347 commented on Jun 30, 2025 • 0 new comments

• BUG: Inconsistent behavior surrounding pd.fillna

  #61568 commented on Jun 30, 2025 • 0 new comments

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

  #61707 commented on Jun 30, 2025 • 0 new comments

• BUG: dtype keyword in Series constructor ignored for Series input in certain cases

  #59060 commented on Jun 29, 2025 • 0 new comments

• ENH: Make ExtensionArray a Protocol

  #57633 commented on Jun 29, 2025 • 0 new comments

• QST: Why is subtracting pandas.timedelta from pandas.date not vectorized?

  #58315 commented on Jun 29, 2025 • 0 new comments

• ENH: read_parquet as a class method

  #58303 commented on Jun 29, 2025 • 0 new comments

• QST: Should the absence of tzdata package affect the performance in any way ?

  #61218 commented on Jun 29, 2025 • 0 new comments