1 Release published by 1 person

• v2.3.0 Pandas 2.3.0

  published Jun 5, 2025

80 Pull requests merged by 40 people

• DOC/ENH: Holiday days_of_week value error

  #61658 merged Jun 17, 2025

• Fix some incorrect indents in development documentation

  #61664 merged Jun 17, 2025

• BUG: Fix RecursionError when apply native container types as a func

  #61615 merged Jun 16, 2025

• WEB: Reorganization of the Ecosystem page

  #61657 merged Jun 16, 2025

• ENH: Support for Orthodox Easter

  #61666 merged Jun 16, 2025

• fix std/var with complex array

  #61646 merged Jun 16, 2025

• DOC: Make the benchmarks URL clickable

  #61661 merged Jun 16, 2025

• WEB: Clean up Ecosystem page

  #61656 merged Jun 13, 2025

• WEB: Add table of contents to the Ecosystem

  #61655 merged Jun 13, 2025

• TST: Remove match= in test_setitem_invalid to avoid PytestWarning

  #61577 merged Jun 13, 2025

• [backport 2.3.x] TST: update xfail xarray version check in to_xarray test (#61648)

  #61652 merged Jun 13, 2025

• WEB: Replace os.path with pathlib.Path in pandas_web.py

  #61604 merged Jun 13, 2025

• DOC/ENH: Holiday exclusion argument

  #61600 merged Jun 13, 2025

• [backport 2.3.x] API (string dtype): implement hierarchy (NA > NaN, pyarrow > python) for consistent comparisons between different string dtypes (#61138)

  #61649 merged Jun 13, 2025

• CI: Fix slow mamba solver issue by limiting boto3 versions

  #61594 merged Jun 13, 2025

• TST: update xfail xarray version check in to_xarray test

  #61648 merged Jun 13, 2025

• [backport 2.3.x] ENH(string dtype): fallback for HDF5 with UTF-8 surrogates (#60993)

  #61639 merged Jun 13, 2025

• [backport 2.3.x] BUG(string dtype): groupby/resampler.min/max returns float on all NA strings (#60985)

  #61633 merged Jun 12, 2025

• [2.3.x] CI: temporarily pin numpy to 2.2 until latest numexpr is available

  #61638 merged Jun 12, 2025

• [backport 2.3.x] BUG(string dtype): Empty sum produces incorrect result (#60936)

  #61625 merged Jun 12, 2025

• [backport 2.3.x] API: ignore empty range/object dtype in Index setop operations (string dtype compat) (#60797)

  #60948 merged Jun 12, 2025

• DOC: Title Capitalization and Grammar Fix

  #61630 merged Jun 11, 2025

• ENH: Implement to_iceberg

  #61507 merged Jun 9, 2025

• Update whatsnew for issue #53115

  #61586 merged Jun 9, 2025

• WEB: remove "String data type" from "Roadmap points pending a PDEP" section.

  #61601 merged Jun 8, 2025

• WEB: Restore website width and improve table of contents style

  #61593 merged Jun 8, 2025

• DOC: Validate versions.json before building docs #61573

  #61578 merged Jun 7, 2025

• WEB: Moving maintainers to inactive status

  #61591 merged Jun 6, 2025

• CI: Update Python version to 3.11 in environment.yml

  #61592 merged Jun 6, 2025

• Avoid re-enabling the GIL at runtime

  #61589 merged Jun 6, 2025

• BUILD: Add wheels for musllinux_aarch64

  #61567 merged Jun 6, 2025

• DOC: Fix typo in to_html and to_string docs

  #61555 merged Jun 6, 2025

• BUG: Raise MergeError when suffixes result in duplicate column names …

  #61422 merged Jun 6, 2025

• WEB: Refine PDEP presentation

  #58791 merged Jun 6, 2025

• DOC: Fix typos

  #61580 merged Jun 6, 2025

• BUG: Fix JSON typo that breaks javascript in the docs

  #61572 merged Jun 5, 2025

• WEB: Update versions.json for 2.3

  #61562 merged Jun 5, 2025

• Backport PR #61560: DOC: Set date for v2.3.0.rst whatsnew

  #61561 merged Jun 4, 2025

• DOC: Set date for v2.3.0.rst whatsnew

  #61560 merged Jun 4, 2025

• Backport PR #61519: BUILD: Bump Cython to 3.1

  #61558 merged Jun 4, 2025

• BUILD: Bump Cython to 3.1

  #61519 merged Jun 4, 2025

• Backport PR #61549 on branch 2.3.x (TST: Add error message for test_groupby_raises_category_on_category for quantile)

  #61556 merged Jun 4, 2025

• TST: Add error message for test_groupby_raises_category_on_category for quantile

  #61549 merged Jun 4, 2025

• DOC: Move PyCapsule whatsnew note from v3.0.0 to v2.3.0

  #61553 merged Jun 4, 2025

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

  #61536 merged Jun 2, 2025

• DOC: Improve lookup documentation

  #61471 merged Jun 2, 2025

• BUG: Fix sorting by column named None in DataFrame.sort_values (GH#61512)

  #61517 merged Jun 2, 2025

• DOC: fix ES01 for pandas.plotting.autocorrelation_plot

  #61526 merged Jun 2, 2025

• DOC: Typo fix for .astype() in cheatsheet

  #61528 merged Jun 2, 2025

• Backport PR #61518 on branch 2.3.x (TST: Use external_error_raised for numpy-raised test_error_invalid_values)

  #61520 merged May 30, 2025

• TST: Use external_error_raised for numpy-raised test_error_invalid_values

  #61518 merged May 30, 2025

• BUG: Fix DatetimeIndex timezone preservation when joining indexes with same timezone but different units

  #61234 merged May 30, 2025

• BUG: Raise clear error for duplicate id_vars in melt (GH61475)

  #61484 merged May 30, 2025

• BUG: Fix inconsistent returned objects when applying groupby aggregations

  #61508 merged May 30, 2025

• BUGFIX: escape quotechar when escapechar is not None (even if quoting=csv.QUOTE_NONE)

  #61514 merged May 30, 2025

• ENH: Added dict support for pd.set_option

  #61151 merged May 29, 2025

• ENH: Support third-party execution engines in Series.map

  #61467 merged May 27, 2025

• CLN Replace direct import of closing with qualified contextlib usage

  #61506 merged May 27, 2025

• Backport PR #60739 on branch 2.3.x (ENH: pandas.api.interchange.from_dataframe now uses the Arrow PyCapsule Interface if available, only falling back to the Dataframe Interchange Protocol if that fails)

  #61488 merged May 27, 2025

• DOC: Typo in shared_docs

  #61497 merged May 27, 2025

• DOC: use Hashable instead of label

  #61500 merged May 27, 2025

• DOC: Fixes dangling parenthesis in .rst files

  #61501 merged May 27, 2025

• DOC: Restructure and expand UDF page

  #61470 merged May 27, 2025

• DOC: Fix sparse and dense array memory usage comparison.

  #61495 merged May 26, 2025

• DOC: Fix incorrect reST markups in What's new

  #61492 merged May 26, 2025

• Bug cov nat

  #60898 merged May 23, 2025

• DOC: Fix formatting in indexing.rst

  #61480 merged May 22, 2025

• Wheels for win_arm64

  #61463 merged May 21, 2025

• Backport PR #61399: BUG: round on object columns no longer raises a TypeError

  #61472 merged May 21, 2025

• DOC: Expand on different Getitem uses

  #60806 merged May 21, 2025

• BUG: round on object columns no longer raises a TypeError

  #61399 merged May 21, 2025

• fix(doc): #61432 typing

  #61455 merged May 20, 2025

• BUG: Fix #57608: queries on categorical string columns in HDFStore.select() return unexpected results.

  #61225 merged May 20, 2025

• CLN: Expose arguments in DataFrame.query

  #61413 merged May 20, 2025

• DOC: fix two mistakes in missing_data.rst

  #61461 merged May 19, 2025

• PERF: Restore old performances with .isin() on columns typed as np.ui…

  #61320 merged May 19, 2025

• TYP: Update typing for 3.10

  #61453 merged May 19, 2025

• DOC: change pandas.DataFrame.unstack's fill_value param to scalar

  #61459 merged May 19, 2025

• BUG: Fix DataFrame constructor misclassification of array-like with 'name' attribute (#61443)

  #61451 merged May 19, 2025

• API (string dtype): implement hierarchy (NA > NaN, pyarrow > python) for consistent comparisons between different string dtypes

  #61138 merged May 19, 2025

45 Pull requests opened by 32 people

• ENH: Added `DataFrame.nsorted` to select top ``n`` rows according to column-dependent order

  #61457 opened May 19, 2025

• BUG: Raise ValueError on integer indexers containing NA; skip test for unsupported EAs(#56727)

  #61465 opened May 20, 2025

• ENH: Implement PDEP-17

  #61468 opened May 20, 2025

• DOC: Improve DateOffset docstring with constructor and examples (#52431)

  #61476 opened May 22, 2025

• BUG: Fixed issue where rolling.kurt() calculations would be effected by values outside of scope

  #61481 opened May 22, 2025

• Implemented NumbaExecutionEngine

  #61487 opened May 23, 2025

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

  #61498 opened May 26, 2025

• ENH: Support Plugin Accessors Via Entry Points

  #61499 opened May 26, 2025

• Use `TypeAlias` in code where types are declared

  #61504 opened May 27, 2025

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

  #61524 opened May 31, 2025

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

  #61525 opened May 31, 2025

• ENH: Implement DataFrame.select

  #61527 opened May 31, 2025

• API: Replace na_action parameter in Series/DataFrame/Index.map by the standard skipna

  #61530 opened Jun 1, 2025

• BUG: Fix Series.str.zfill for ArrowDtype string arrays #61485

  #61533 opened Jun 1, 2025

• ENH pandas-dev#60693: shift operations for Series and DataFrames

  #61540 opened Jun 3, 2025

• BUG: Fix Index.equals between object and string

  #61541 opened Jun 3, 2025

• DOC: Fix docs for BusinessDay constructor #52431

  #61543 opened Jun 3, 2025

• ENH: Adding DataFrame plotting benchmarks for large datasets

  #61546 opened Jun 4, 2025

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

  #61550 opened Jun 4, 2025

• Parallelize test_sql.py - Issue #60378

  #61551 opened Jun 4, 2025

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

  #61552 opened Jun 4, 2025

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

  #61582 opened Jun 6, 2025

• ENH: improve optional import error message

  #61597 opened Jun 7, 2025

• PDEP-18: Nullable Object Dtype

  #61599 opened Jun 7, 2025

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

  #61605 opened Jun 8, 2025

• DEP: update python-calamine to 0.3.2

  #61606 opened Jun 8, 2025

• Fix/devcontainer qt deps

  #61611 opened Jun 8, 2025

• BUG: DataFrame.explode fails with str dtype

  #61623 opened Jun 10, 2025

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

  #61624 opened Jun 10, 2025

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

  #61629 opened Jun 10, 2025

• Description of pandas_datetime_exec function.

  #61635 opened Jun 11, 2025

• Fix void dtype handling

  #61637 opened Jun 12, 2025

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

  #61640 opened Jun 12, 2025

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

  #61642 opened Jun 12, 2025

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

  #61644 opened Jun 13, 2025

• WEB: Moving maintainers to inactive (no answer from them)

  #61647 opened Jun 13, 2025

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

  #61650 opened Jun 13, 2025

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

  #61651 opened Jun 13, 2025

• [backport 2.3.x] CI: Fix slow mamba solver issue by limiting boto3 version (#61594)

  #61653 opened Jun 13, 2025

• DOC: Add release notes template for 2.3.1

  #61654 opened Jun 13, 2025

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

  #61659 opened Jun 14, 2025

• Bump pypa/cibuildwheel from 2.23.3 to 3.0.0

  #61668 opened Jun 16, 2025

• CLN: Use dedup_names for column name mangling in Python parser (#50371)

  #61670 opened Jun 16, 2025

• DOC: Document two-issue limit for `take` command in contributing guide #61626

  #61673 opened Jun 17, 2025

• BUG: fix: `list` as index item does not raise

  #61674 opened Jun 17, 2025

65 Issues closed by 17 people

• BUG: cannot use registered float16 extension dtype

  #46111 closed Jun 18, 2025

• BUG: RecursionError when apply generic alias as a func

  #61565 closed Jun 16, 2025

• ENH: Support for Orthodox Easter

  #61665 closed Jun 16, 2025

• BUG: Incorrect guess_datetime_format response

  #61663 closed Jun 16, 2025

• BUG: `Series.std` and `Series.var` give incorrect results for complex values.

  #61645 closed Jun 16, 2025

• WEB: Add table of content for the Ecosystem page

  #61587 closed Jun 16, 2025

• BUG: regex match in compliance tests no longer match pytest expected inputs

  #61557 closed Jun 13, 2025

• DOC/ENH: `Holiday` documentation is missing or hard to find for re-arranged national holidays.

  #54382 closed Jun 13, 2025

• CI: Micromamba taking too long to resolve the environments in the CI

  #61531 closed Jun 13, 2025

• BUG: Boolean Series (actually object) with <NA> values breaks ~ negation and reverts to bit-wise operations

  #60049 closed Jun 13, 2025

• ENH: Infer column dtype when constructing object with pd.NA

  #58366 closed Jun 13, 2025

• BUG: Dangerous inconsistency: `~` operator changes behavior based on context outside a target.

  #61598 closed Jun 13, 2025

• BUG: `explode()` converts timestamps at millisecond resolution in DatetimeIndex to nanosecond resolution

  #61610 closed Jun 11, 2025

• BUG: duplicated() raises error with singlton set as subset

  #61554 closed Jun 11, 2025

• RLS: 2.3

  #59664 closed Jun 8, 2025

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

  #61596 closed Jun 7, 2025

• WEB: Test that our versions JSON is valid

  #61573 closed Jun 7, 2025

• BUG: 2.3.0 didn't publish wheels for musl-aarch64 (arm)

  #61574 closed Jun 6, 2025

• BUG: Duplicate columns allowed on `merge` if originating from separate dataframes

  #61402 closed Jun 6, 2025

• WEB: use sphinx to render the PDEPs

  #51461 closed Jun 6, 2025

• Failed to install pandas==2.3.0 with Python 3.9

  #61563 closed Jun 6, 2025

• DOC: Version dropdown not working

  #61571 closed Jun 5, 2025

• Failed to install pandas BUILD: 2.3.0 Windows

  #61564 closed Jun 5, 2025

• Pandas DataFrame.query Code Injection (Unpatched)

  #61559 closed Jun 5, 2025

• ENH: Support for Python 3.13.2 free-threading version

  #60972 closed Jun 4, 2025

• usecols investigation for various I/O functions

  #61538 closed Jun 3, 2025

• BUG: pd.read_csv error when parse_dates used on index_col for dtype_backend="pyarrow"

  #57930 closed Jun 3, 2025

• BUG: pd.read_csv does not work with nullable_dtype coercion

  #52594 closed Jun 3, 2025

• BUG: `AttributeError` when `rolling.agg` use `np.prod` to calculate rolling product

  #54203 closed Jun 2, 2025

• BUG: to_datetime with mixed iso-str and ints

  #50721 closed Jun 2, 2025

• BUG: Union of two DateTimeIndexes is incorrectly calculated

  #60816 closed Jun 2, 2025

• BUG: FutureWarning for Boolean sparse dtypes in pd.DataFrame.sparse.from_spmatrix()

  #59739 closed Jun 2, 2025

• BUG: Spurious `FutureWarning` when using `pd.read_json()`

  #59511 closed Jun 2, 2025

• BUG: pandas testsuite on 2.2.x with numpy 2 fails on numexpr

  #58548 closed Jun 2, 2025

• DOC: Documentation website says version 2.2 is unstable

  #57593 closed Jun 2, 2025

• CoW warning mode for cases that will change behaviour

  #56019 closed Jun 2, 2025

• BUG: Cannot sort by columns named None

  #61512 closed Jun 2, 2025

• DOC: Official "Cheat Sheet" shows `as_type()` method, correct signature is `astype()`

  #61523 closed Jun 2, 2025

• BUG: VSCode go to definition doesn't work with pandas.api.extensions.register_dataframe_accessor

  #61510 closed Jun 2, 2025

• PERF: Slow Windows / Ubuntu Unit Tests during Status Checks

  #61460 closed Jun 2, 2025

• BUG: to_latex does not escape % with percent formatter

  #61478 closed May 30, 2025

• BUG: Timezone upon DatetimeIndex union is changed to UTC

  #60080 closed May 30, 2025

• BUG: More Indicative Error when pd.melt with duplicate columns

  #61475 closed May 30, 2025

• BUG: Inconsistent returned objects when applying groupby aggregations

  #61503 closed May 30, 2025

• BUG: to_csv() quotechar/escapechar behavior differs from csv module

  #61407 closed May 30, 2025

• ENH: Support dict to `pd.set_option` for cleaner code

  #61093 closed May 29, 2025

• ENH: re-implement DataFrame.lookup.

  #40140 closed May 29, 2025

• BUG: Mask changing value despite of no True return

  #61505 closed May 27, 2025

• ENH: Broaden `dict` to `Mapping` as replace argument

  #61440 closed May 27, 2025

• ENH: Supporting a `mapper` function as the 1st argument in `DataFrame.set_axis`

  #61493 closed May 27, 2025

• DOC: kwargs naming in pd.Series.interpolate

  #61494 closed May 25, 2025

• BUG: dataframe.to_csv calls defauly numpy to_string function, resulting in

  #61474 closed May 23, 2025

• BUG: read_hdf() doesn't handle datetime64[ms] properly

  #61479 closed May 23, 2025

• BUG: cov buggy when having NaT in column

  #53115 closed May 23, 2025

• BUILD: Provide wheel for Windows ARM64

  #61462 closed May 21, 2025

• BUG: timeseries plot x-axis starts way off when one column is all NaNs

  #36252 closed May 21, 2025

• BUG: round on object columns no longer raises a TypeError

  #61206 closed May 21, 2025

• DOC: Series.name is just Hashable, but many column arguments require str

  #61432 closed May 20, 2025

• BUG: queries on categorical string columns in HDFStore.select() return unexpected results

  #57608 closed May 20, 2025

• ENH: Explicitly opt out of pytz support

  #60025 closed May 20, 2025

• DOC/ENH: Add full list of argument for DataFrame.query

  #61405 closed May 20, 2025

• PERF: Slowdowns with .isin() on columns typed as np.uint64

  #60098 closed May 19, 2025

• DOC: DataFrame.unstack should accept fill_value with more types than just int/str/dict

  #61445 closed May 19, 2025

• BUG: `DataFrame` constructor not compatible with array-like classes that have a `'name'` attribute

  #61443 closed May 19, 2025

• API (string dtype): comparisons between different string classes

  #60639 closed May 19, 2025

60 Issues opened by 52 people

• Incorrect rolling std() results on very large DataFrames

  #61677 opened Jun 18, 2025

• BUG: Implicit conversion to float64 with isin()

  #61676 opened Jun 18, 2025

• BUG: DataFrame.join(other) raises InvalidIndexError if column index is CategoricalIndex

  #61675 opened Jun 18, 2025

• BUG: np.nan to datetime assertionerror when too large datetime given

  #61671 opened Jun 16, 2025

• ENH: Switch to trusted publishing for package upload to PyPI in CI

  #61669 opened Jun 16, 2025

• BUG: pd.read_sql is incorrectly reading long int when connecting to Teradata

  #61667 opened Jun 16, 2025

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

  #61662 opened Jun 15, 2025

• BUG: Type error supplying SQLAlchemy NVARCHAR length in to_sql()

  #61660 opened Jun 14, 2025

• BUG: replace value failed

  #61643 opened Jun 13, 2025

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

  #61641 opened Jun 12, 2025

• BUG: Groupby aggregate coersion of outputs inconsistency for pyarrow dtypes

  #61636 opened Jun 12, 2025

• ENH: ExcelWriter append or create mode

  #61634 opened Jun 11, 2025

• DOC: warn about apply with raw=True, if function returns Optional[int]

  #61632 opened Jun 11, 2025

• DOC:

  #61631 opened Jun 11, 2025

• BUG: PerformanceWarning when agg with pd.NamedAgg and as_index=False

  #61628 opened Jun 10, 2025

• BUG: the behavior of DataFrameGroupBy.apply(..., include_groups=True) breaks post-mortem debugging

  #61627 opened Jun 10, 2025

• DOC: Pandas contributor take limit

  #61626 opened Jun 10, 2025

• BUG: CoW - eq not implemented for <class 'pandas.core.internals.blocks.ExtensionBlock'>

  #61622 opened Jun 10, 2025

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

  #61621 opened Jun 10, 2025

• API: New global option to set the default dtypes to use

  #61620 opened Jun 10, 2025

• Moving to PyArrow dtypes by default

  #61618 opened Jun 9, 2025

• BUG: numpy_nullable NaNs do not round-trip through CSV

  #61617 opened Jun 9, 2025

• CI: New NumPy release breaking Numba in our CI

  #61616 opened Jun 9, 2025

• QST: Subject: User Experience Issue - NumPy Types in DataFrame Results Breaking Readability

  #61607 opened Jun 8, 2025

• BUG: Writing UUIDs fail

  #61602 opened Jun 7, 2025

• RLS: 2.3.1

  #61590 opened Jun 6, 2025

• CI: Test pandas with numpy 1.26

  #61588 opened Jun 6, 2025

• Unpin Python version in the development environment

  #61585 opened Jun 6, 2025

• Proposal to allow third-party engines for readers and writers

  #61584 opened Jun 6, 2025

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

  #61583 opened Jun 6, 2025

• BUG: pd.DataFrame.mul has not support fill_value?

  #61581 opened Jun 6, 2025

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

  #61579 opened Jun 6, 2025

• BUG: comparing strings of different dtypes errors in 2.3

  #61570 opened Jun 5, 2025

• BUG: Inconsistent behavior surrounding pd.fillna

  #61568 opened Jun 5, 2025

• BUILD: Installation issue on Mac with M1 Pro arm64 processor. pandas_parser.cpython-311-darwin.so is using x86_64 arch

  #61566 opened Jun 5, 2025

• ENH: Columns formatted as "Text" in Excel are read as numbers

  #61539 opened Jun 3, 2025

• BUG: use of iloc with heterogeneous DataFrame sometimes performs undocumented conversions

  #61537 opened Jun 2, 2025

• ENH: read_csv tz option

  #61535 opened Jun 2, 2025

• ENH: speed up `DataFrame.plot` using `LineCollection`

  #61532 opened Jun 1, 2025

• raise TypeError when function returns object-like results

  #61529 opened Jun 1, 2025

• ENH: Implement DataFrame.select to select columns

  #61522 opened May 30, 2025

• Misleading error message when PyTables is not installed

  #61521 opened May 30, 2025

• BUG: DataFrame.sample weights not required to sum to less than 1

  #61516 opened May 29, 2025

• ENH: Ability to name columns/index levels when using `.str.split(..., expand=True)` on `Index`/`Series`

  #61515 opened May 29, 2025

• ENH: Adding pd.from_pydantic

  #61513 opened May 29, 2025

• DOC: Docker image provided on "Debugging C extensions" is out of date

  #61511 opened May 28, 2025

• BUG: margin for pivot_table is incorrect with NA column/index values

  #61509 opened May 28, 2025

• BUG: Print alignement problem with some unicode characters

  #61502 opened May 26, 2025

• BUG: Passing string[pyarrow] to the dtype parameter of e.g. csv_read() does produce a string type Series

  #61496 opened May 26, 2025

• BUG: If you add _metadata to a custom subclass of Series, the sequence name is lost when indexing

  #61491 opened May 24, 2025

• pandas logo license question

  #61486 opened May 23, 2025

• BUG: zfill with pyarrow string

  #61485 opened May 23, 2025

• BUG: date_range behaviour is inconsistent when using inclusive=right

  #61483 opened May 23, 2025

• BUG: Pandas concat raises RuntimeWarning: '<' not supported between instances of 'int' and 'tuple', sort order is undefined for incomparable objects with multilevel columns

  #61477 opened May 22, 2025

• BUG: assert_frame_equal(check_dtype=False) fails when comparing two DFs containing pd.NA that only differ in dtype (object vs Int32)

  #61473 opened May 21, 2025

• BUG: pandas.pivot_table margins, dropna and observed parameters not producing expected result

  #61469 opened May 21, 2025

• BUG: Series.str.isdigit with pyarrow dtype doesn't honor unicode superscripts

  #61466 opened May 20, 2025

• BUG: Decimal and float-to-int conversion issues with pyarrow ≥18.0.0 in parquet and Arrow dtype tests

  #61464 opened May 19, 2025

• Use BaseExecutionEngine for Python and Numba engines

  #61458 opened May 19, 2025

• PERF: Setting an item of incompatible dtype

  #61456 opened May 19, 2025

117 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.

• ENH: Implement translations infrastructure

  #61380 commented on Jun 1, 2025 • 41 new comments

• TST: Testing for mixed int/str Index

  #61349 commented on Jun 2, 2025 • 19 new comments

• ENH: Implemented MultiIndex.searchsorted method ( GH14833)

  #61435 commented on Jun 9, 2025 • 12 new comments

• BUG: Raise TypeError when joining with non-DataFrame using 'on=' (GH#61434)

  #61454 commented on May 25, 2025 • 7 new comments

• Fix #60766:.map,.apply would convert element type for extension array

  #61396 commented on Jun 3, 2025 • 6 new comments

• BUG: Copy attrs on pd.merge()

  #60357 commented on Jun 11, 2025 • 5 new comments

• Fix #61072: inconsistent fullmatch results with regex alternation

  #61343 commented on Jun 9, 2025 • 3 new comments

• ExtensionArray.Round method and tests

  #54582 commented on Jun 18, 2025 • 2 new comments

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

  #60772 commented on Jun 14, 2025 • 2 new comments

• PDEP-15: Reject PDEP-10

  #58623 commented on Jun 11, 2025 • 1 new comment

• BUG: PyArrow timestamp type does not work with map() function

  #61231 commented on Jun 7, 2025 • 0 new comments

• "ValueError: Must have equal len keys and value when setting with an iterable" when updating an object type cell using .loc with a nd.array

  #57962 commented on Jun 7, 2025 • 0 new comments

• DOC: Fix formatting errors in docstrings

  #27977 commented on Jun 5, 2025 • 0 new comments

• TST: Make test_sql.py parallelizable

  #60378 commented on Jun 4, 2025 • 0 new comments

• BUG: join unexpectedly created extra column start with "key_"

  #61294 commented on Jun 7, 2025 • 0 new comments

• ENH: Add `coalesce_keys` option to join

  #61033 commented on Jun 4, 2025 • 0 new comments

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

  #60895 commented on Jun 8, 2025 • 0 new comments

• BUG: Inconsistent behaviour of apply with result_type='expand' for functions that can return NaN type values

  #61057 commented on Jun 4, 2025 • 0 new comments

• DOC: Simplify pandas theme footer

  #51536 commented on Jun 3, 2025 • 0 new comments

• ENH: Python 3.13 free-threading support

  #59057 commented on Jun 9, 2025 • 0 new comments

• BUG/FEATURE REQUEST: DataFrame.to_sql() tries to create table when it exists

  #61418 commented on Jun 3, 2025 • 0 new comments

• BUG: Fix Dataframe handling of scalar Timestamp #61444

  #61450 commented on May 23, 2025 • 0 new comments

• DOC: Fix docs for various offset constructors

  #52431 commented on Jun 3, 2025 • 0 new comments

• BUG: documented usage of of `str.split(...).str.get` fails on dtype `large_string[pyarrow]`

  #61431 commented on Jun 3, 2025 • 0 new comments

• BUG: Slower `DataFrame.plot` with `DatetimeIndex`

  #61398 commented on Jun 3, 2025 • 0 new comments

• DOC: add button to edit on GitHub

  #39859 commented on Jun 2, 2025 • 0 new comments

• API: IncompatibleFrequency should subclass TypeError

  #55782 commented on Jun 2, 2025 • 0 new comments

• DOC: Provide a public place for users to link to our documentation

  #55632 commented on Jun 2, 2025 • 0 new comments

• ENH: set `__module__` on top-level public objects

  #55178 commented on Jun 2, 2025 • 0 new comments

• ENH: switch to copy=False by default when DataFrame is constructed from dict of Series/Index for CoW

  #52967 commented on Jun 2, 2025 • 0 new comments

• API: Index.__array_wrap__ stop special-casing bool dtype

  #52676 commented on Jun 2, 2025 • 0 new comments

• BUG: pd.Timestamp() defaults to [s] resolution instead of [ns]

  #52653 commented on Jun 2, 2025 • 0 new comments

• BUG: `DataFrame.dtypes` doesn't include backend for `string` columns

  #50099 commented on Jun 2, 2025 • 0 new comments

• BUG: `Styler.to_excel` does not export styles and formats correctly

  #42276 commented on Jun 2, 2025 • 0 new comments

• API: Make 'D' & offsets.Day always operate as calendar day instead of 24 Hour

  #41943 commented on Jun 2, 2025 • 0 new comments

• Fix alignment in Series subtraction with MultiIndex, Index and NaN values (#60908)

  #61381 commented on Jun 15, 2025 • 0 new comments

• [WIP] ENH: support reading directory in read_csv

  #61275 commented on Jun 19, 2025 • 0 new comments

• BUG: Fix #61221: Exception with unstack(sort=False) and NA in index.

  #61226 commented on Jun 16, 2025 • 0 new comments

• BUG: fix to_json on period

  #61203 commented on Jun 17, 2025 • 0 new comments

• BUG: Added deprecation warning to Timestamp constructor

  #61149 commented on Jun 4, 2025 • 0 new comments

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

  #61061 commented on Jun 6, 2025 • 0 new comments

• BUG: Fix return type of loc/iloc

  #61054 commented on Jun 15, 2025 • 0 new comments

• TST(string dtype): Resolve xfails in test_from_dummies

  #60694 commented on Jun 2, 2025 • 0 new comments

• ENH: add basic DataFrame.from_arrow class method for importing through Arrow PyCapsule interface

  #59696 commented on Jun 3, 2025 • 0 new comments

• BUG: groupby.agg with UDF changing pyarrow dtypes

  #59601 commented on May 22, 2025 • 0 new comments

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

  #59173 commented on Jun 6, 2025 • 0 new comments

• PDEP-16: Consistent missing value handling

  #58988 commented on Jun 11, 2025 • 0 new comments

• DEPR: object inference in to_stata

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

• API / COW: ensure every new Series/DataFrame also has new (shallow copy) index

  #53699 commented on Jun 2, 2025 • 0 new comments

• BUG: `pandas.Styler.__repr__` and `pandas.Styler.__str__` cause `nbconvert` failure to display data

  #55908 commented on Jun 17, 2025 • 0 new comments

• BUG: round not functioning as expected

  #55114 commented on Jun 17, 2025 • 0 new comments

• CLN: Use dedup_names in all instances where duplicate column names are renamed

  #50371 commented on Jun 16, 2025 • 0 new comments

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

  #54466 commented on Jun 14, 2025 • 0 new comments

• BUG: `Index.drop_duplicates()` is inconsistent for unhashable values

  #60925 commented on Jun 13, 2025 • 0 new comments

• BUG: mix of int and pd.NA defaults to object dtype

  #33662 commented on Jun 13, 2025 • 0 new comments

• ENH: Enable nsmallest/nlargest on object dtype

  #61166 commented on Jun 12, 2025 • 0 new comments

• ENH: read_csv with usecols shouldn't change column order

  #61386 commented on Jun 10, 2025 • 0 new comments

• pd.crosstab, categorical data and missing instances

  #16367 commented on Jun 10, 2025 • 0 new comments

• DOC: Generating docs doesn't work if path has whitespaces

  #22836 commented on Jun 10, 2025 • 0 new comments

• BUG: Error when trying to use `pd.date_range`

  #57215 commented on Jun 2, 2025 • 0 new comments

• pandas' recommendation on inplace deprecation and categorical column

  #57104 commented on Jun 2, 2025 • 0 new comments

• BUG: DataFrame.update() raises FutureWarning due to the use of 'where' method

  #57124 commented on Jun 2, 2025 • 0 new comments

• BUG: df.stack() returns wrong data when NaT is in index (regression since 2.1.0, ok in <= 2.0.3)

  #57152 commented on Jun 2, 2025 • 0 new comments

• BUG: pandas 2.2.0 `DataFrame.groupby` regression when group labels of type `pd.Timestamp`

  #57192 commented on Jun 2, 2025 • 0 new comments

• Potential regression induced by PR #56037

  #57366 commented on Jun 2, 2025 • 0 new comments

• BUG: pandas.tseries.offsets.Second() division

  #57264 commented on Jun 2, 2025 • 0 new comments

• BUG: thousands separator in read_html alters data even though converter is set for a specific column

  #39005 commented on Jun 2, 2025 • 0 new comments

• ENH: support new-style float_format string in to_csv

  #49580 commented on Jun 1, 2025 • 0 new comments

• BUG: Creating Index name using `names` names argument, doesn't set index name

  #19082 commented on May 31, 2025 • 0 new comments

• BUG(?): rolling sum with pyarrow types results in float64 instead of preserving integer type

  #61144 commented on May 30, 2025 • 0 new comments

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

  #54792 commented on May 29, 2025 • 0 new comments

• ENH: Need new semantics for selecting parquet engine in Pandas 3

  #56642 commented on May 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 May 28, 2025 • 0 new comments

• ENH: Make DataFrame.filter accept filters in new formats

  #61317 commented on May 27, 2025 • 0 new comments

• BLD: Drop Python 3.10 support

  #60059 commented on May 27, 2025 • 0 new comments

• BUG: Series.mask incorrectly replaces positions of pd.NA in the cond argument

  #60729 commented on May 27, 2025 • 0 new comments

• ENH: Using pyright to analyze missing type declarations

  #39813 commented on May 27, 2025 • 0 new comments

• DOC: document optional arguments on plot submethods

  #11042 commented on May 27, 2025 • 0 new comments

• BUG: inserting list of strings into Series auto-infers them as datetimes with mixed formats

  #61353 commented on May 24, 2025 • 0 new comments

• issue when shifting with Timedelta in a groupby

  #20492 commented on May 23, 2025 • 0 new comments

• Multiarray searchsorted fails

  #14833 commented on May 22, 2025 • 0 new comments

• BUG: int origin treated as nanoseconds since epoch time

  #54788 commented on May 22, 2025 • 0 new comments

• BUG: Series.combine_first loss of precision

  #60128 commented on May 21, 2025 • 0 new comments

• BUG: memory leak when slice series var assigning to itself

  #60640 commented on May 21, 2025 • 0 new comments

• BUG: CustomBusinessDay not respecting calendar

  #60647 commented on May 20, 2025 • 0 new comments

• BUG: engine calamine lost 0 when read_excel from vlookup cell

  #61186 commented on May 20, 2025 • 0 new comments

• ENH: access sliced dataframe from rolling.cov

  #61401 commented on May 20, 2025 • 0 new comments

• ENH: The prompt message in the error does not bring any valid bug prompts

  #61417 commented on May 20, 2025 • 0 new comments

• DEPR: Index == Series should return NotImplemented

  #36759 commented on Jun 2, 2025 • 0 new comments

• BUG: DTA/TDA setitem breaks freq on views

  #31218 commented on Jun 2, 2025 • 0 new comments

• DEPR: pandas/core

  #27522 commented on Jun 2, 2025 • 0 new comments

• astype(str) / astype_unicode: np.nan converted to "nan" (checknull, skipna)

  #25353 commented on Jun 2, 2025 • 0 new comments

• DISC: Remove DTA/TDA/PA `freq`

  #24566 commented on Jun 2, 2025 • 0 new comments

• BUG: Can only compare identically-labeled Series objects (string vs. object)

  #61099 commented on Jun 2, 2025 • 0 new comments

• BUILD: installation using wheels fails when using nix + uv2nix

  #61079 commented on Jun 2, 2025 • 0 new comments

• BUG: `.str.contains()` regex lookbehind and lookahead fail for data type `string[pyarrow]`

  #60833 commented on Jun 2, 2025 • 0 new comments

• BUG: assignment fails with copy_on_write = True

  #60309 commented on Jun 2, 2025 • 0 new comments

• API: return value of `.values` for Series with the future string dtype (numpy array vs extension array)

  #60301 commented on Jun 2, 2025 • 0 new comments

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

  #60234 commented on Jun 2, 2025 • 0 new comments

• BUG (string dtype): comparison of string column to mixed object column fails

  #60228 commented on Jun 2, 2025 • 0 new comments

• String dtype: overview of breaking behaviour changes

  #59328 commented on Jun 2, 2025 • 0 new comments

• ENH: Need API support and __repr__ to discover the storage used for strings

  #59342 commented on Jun 2, 2025 • 0 new comments

• BUG: `Index.difference` is returning too many values

  #58971 commented on Jun 2, 2025 • 0 new comments

• Potential regression induced by "BUG: Use large_string in string array consistently"

  #58651 commented on Jun 2, 2025 • 0 new comments

• BUG: Pandas 2.2 breaks SQLAlchemy 1.4 compatibility

  #57049 commented on Jun 2, 2025 • 0 new comments

• Potential regression induced by commit 9cd5e55

  #58287 commented on Jun 2, 2025 • 0 new comments

• ENH: No longer always show hour, minute and second components for pd.Interval

  #57748 commented on Jun 2, 2025 • 0 new comments

• BUG: melt no longer supports id_vars and value_vars collapsing levels accross MultiIndex

  #57663 commented on Jun 2, 2025 • 0 new comments

• BUG: Cannot use numpy FLS as indicies since pandas 2.2.1

  #57645 commented on Jun 2, 2025 • 0 new comments

• API: with CoW, should every new Series/DataFrame object also have its own new Index objects?

  #53721 commented on Jun 2, 2025 • 0 new comments

• BUG: rounding dates to 30mins does not work

  #57002 commented on Jun 2, 2025 • 0 new comments

• BUG: `testing.assert_frame_equal` unhelpful error message for `string[pyarrow]`

  #54190 commented on Jun 2, 2025 • 0 new comments

• BUG: setting 1.02 into float32 Series upcasts to float64

  #55679 commented on Jun 2, 2025 • 0 new comments

• BUG: pd.cut raises error when input is a series that includes NaN and bins is a single number of bins

  #55684 commented on Jun 2, 2025 • 0 new comments

• BUG: Index.get_indexer will change behaviour for nulls with arrow strings

  #55833 commented on Jun 2, 2025 • 0 new comments

• BUG: Resampling with non nano returns an error

  #57427 commented on Jun 2, 2025 • 0 new comments

• BUG: FutureWarning about 'isin' where it is not used

  #57028 commented on Jun 2, 2025 • 0 new comments