18 Pull requests merged by 11 people

• BUG: groupby.idxmin/idxmax with all NA values should raise

  #62026 merged Aug 5, 2025

• BUG: Add min/max methods to ArrowExtensionArray GH#61311

  #61924 merged Aug 5, 2025

• REF: simplify mask_missing

  #62049 merged Aug 5, 2025

• DOC: Add SSLCertVerificationError warning message for documentation b…

  #62015 merged Aug 5, 2025

• REF: Avoid/defer dtype=object containers in plotting

  #62042 merged Aug 5, 2025

• API: improve dtype in df.where with EA other

  #62038 merged Aug 5, 2025

• REF: make copy keyword in recode_for_categories keyword only

  #62019 merged Aug 4, 2025

• API: rank with nullable dtypes preserve NA

  #62043 merged Aug 4, 2025

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

  #62041 merged Aug 4, 2025

• TST: nan->NA in non-construction tests

  #62021 merged Aug 4, 2025

• EHN: return early when the result is None

  #62032 merged Aug 4, 2025

• Bump pypa/cibuildwheel from 3.1.1 to 3.1.3

  #62039 merged Aug 4, 2025

• TST: Speed up hypothesis and slow tests

  #62028 merged Aug 3, 2025

• BUG: Change default of observed in Series.groupby

  #62025 merged Aug 2, 2025

• BUG: Avoid copying categorical codes if copy=False

  #62000 merged Aug 1, 2025

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

  #61804 merged Aug 1, 2025

• DOC: rephrase CoW ChainedAssignmentError message now CoW is always enabled

  #61970 merged Jul 30, 2025

• TST: Raise on pytest.PytestWarning

  #61996 merged Jul 30, 2025

19 Pull requests opened by 16 people

• DOC: documenting pandas.MultIndex.argsort

  #62005 opened Jul 30, 2025

• DOC: Standardize noncompliant docstrings in pandas/io/html.py (flake8-docstrings) #61944

  #62007 opened Jul 31, 2025

• BUG FIX: pandas.arrays.IntervalArray.overlaps() incorrectly documents that it accepts IntervalArray.

  #62009 opened Jul 31, 2025

• BUG: Fix assert_series_equal for categoricals with nulls and check_category_order=False (#62008)

  #62011 opened Jul 31, 2025

• Fix cbusday calendar Typecheck v2

  #62014 opened Jul 31, 2025

• DOC: Add example for multi-column joins using `merge`

  #62016 opened Aug 1, 2025

• BUG: Fix assert_series_equal with check_category_order=False for categoricals with nulls

  #62017 opened Aug 1, 2025

• BUG: Fix is_signed_integer_dtype to handle abstract floating types (GH 62018)

  #62020 opened Aug 1, 2025

• continue from #61957 which closed with unmerged commit

  #62023 opened Aug 2, 2025

• DOC: fix mask/where docstring alignment note (#61781)

  #62029 opened Aug 2, 2025

• BUG: Catch TypeError in _is_dtype_type when converting abstract numpy types (#62018)

  #62030 opened Aug 3, 2025

• API: timestamp resolution inference: default to microseconds when possible

  #62031 opened Aug 3, 2025

• BUG: raise a proper exception when str.rsplit is passed a regex and clarify the docs

  #62035 opened Aug 3, 2025

• API: mode.nan_is_na to consistently distinguish NaN-vs-NA

  #62040 opened Aug 4, 2025

• DOC: updated BooleanDType docstring

  #62045 opened Aug 4, 2025

• BUG Updated border attribute to in-line CSS

  #62046 opened Aug 5, 2025

• BUG: read_csv with engine=pyarrow and numpy-nullable dtype

  #62053 opened Aug 6, 2025

• DOC: Inform users that incomplete reports will generally be closed

  #62054 opened Aug 6, 2025

• BUG: Fix all-NaT when ArrowEA.astype to categorical

  #62055 opened Aug 6, 2025

74 Issues closed by 8 people

• API: Series[Float64] == False

  #62048 closed Aug 6, 2025

• BUG: failing when groupby on data containing bytes

  #62047 closed Aug 6, 2025

• BUG: Pandas mean function fails on type pd.NA with axis=1 but not axis=0

  #62052 closed Aug 5, 2025

• BUG: groupby.idxmin/idxmax will all NA values

  #57745 closed Aug 5, 2025

• BUG: ``'ArrowExtensionArray' object has no attribute 'max'`` when passing pyarrow-backed series to `.iloc`

  #61311 closed Aug 5, 2025

• QST: How to convert large queryset into dataframes in optimized way?

  #55371 closed Aug 5, 2025

• BUG: replace value failed

  #61643 closed Aug 5, 2025

• DOC: Issue with the general expressiveness of the docs

  #61392 closed Aug 5, 2025

• ENH: fillna enhancement with method='nearest'

  #61124 closed Aug 5, 2025

• PERF: why nlargest is so slower?

  #61076 closed Aug 5, 2025

• DOC: Pivot() example call incorrectly used and would give "error: duplicate index"

  #61058 closed Aug 5, 2025

• BUILD: Trouble installing pandas on Windows

  #60947 closed Aug 5, 2025

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

  #61218 closed Aug 5, 2025

• PERF: Setting an item of incompatible dtype

  #61456 closed Aug 5, 2025

• BUG: Unknown Error - Getting from Databricks SQL Python - From PyArrow module (pyarrow.lib.ArrowException)

  #60838 closed Aug 5, 2025

• BUG: "python make.py html" for documentation is giving error

  #60039 closed Aug 5, 2025

• BUG: DataFrame Dict not callabe

  #60086 closed Aug 5, 2025

• ENH: Restore the functionality of `.fillna`

  #59831 closed Aug 5, 2025

• ENH: Add a clear option to interpret strings as Pandas dtypes specifically.

  #59777 closed Aug 5, 2025

• BUG: QST: `pd.read_html` gives tables with duplicated columns

  #56337 closed Aug 5, 2025

• BUG: memory leak when using read_csv with python engine

  #59694 closed Aug 5, 2025

• Bug in Chunk Processing: Non-NULL IDs Become NULL During IterationBUG:

  #59477 closed Aug 5, 2025

• BUG: ArrowNotImplementedError: Unsupported cast from int64 to null using function cast_null

  #59497 closed Aug 5, 2025

• BUG: import has error

  #59527 closed Aug 5, 2025

• Title: Feature Request: Improve diff Function to Support Forward and Backward CompletionENH:

  #59465 closed Aug 5, 2025

• BUG: diff method incorrect on datetime64[s]

  #59650 closed Aug 5, 2025

• ENH: Make merge_asof preserve the index

  #60919 closed Aug 5, 2025

• BUG: Memory leak when creating a df inside a loop

  #60897 closed Aug 5, 2025

• BUG: NameError: name 'pa' is not defined despite `pyarrow` is installed

  #60573 closed Aug 5, 2025

• PERF: index.unique much slower than get_level_values.drop_duplicates

  #60213 closed Aug 5, 2025

• BUG: reading long csv with high numeric values displays a "mixed types" message

  #60082 closed Aug 5, 2025

• BUG: Warning when compiling pandas/_libs/algos.c

  #58829 closed Aug 5, 2025

• ENH: In pandas.testing.assert_frame_equal, support per-column configuration

  #59548 closed Aug 5, 2025

• 'base' argument when resampling has no effect

  #22855 closed Aug 5, 2025

• ENH: PyPy Support

  #42509 closed Aug 5, 2025

• ENH: Allow storing timezone-aware datetimes in a series with a datetime64 dtype

  #46998 closed Aug 5, 2025

• Decrypting file in read_csv

  #44097 closed Aug 5, 2025

• BUG: StringArray is a subclass of PandasArray

  #48638 closed Aug 5, 2025

• DOC: Enhance '10 minute to pandas' by providing video walkthrough to help auditory learners and improve accessibility.

  #59359 closed Aug 5, 2025

• BUG: 2.2.2 pep517 build fails

  #58274 closed Aug 5, 2025

• ENH: Exp function for Series and DataFrame

  #56748 closed Aug 5, 2025

• ENH: Add first_inverted and last_inverted options to keep in DataFrame.duplicated

  #60394 closed Aug 5, 2025

• BUG: Timestamp.tz and DatetimeIndex.tz are inconsistent when pytz 2024.2 is installed

  #59833 closed Aug 5, 2025

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

  #60023 closed Aug 5, 2025

• ENH: A .chi2() method on the DataFrame and Series class that will resemble the .corr() methods

  #60111 closed Aug 5, 2025

• ENH: Decimal year

  #60391 closed Aug 5, 2025

• PERF: Extreme regression in 2.2 when aggregating a DataFrame with .attrs data

  #60070 closed Aug 5, 2025

• ENH: Make pd.Timestamp.astimezone() default to local timezone

  #60692 closed Aug 5, 2025

• ENH: Automate reading of data in chunks

  #61110 closed Aug 5, 2025

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

  #61232 closed Aug 5, 2025

• ENH: read_csv tz option

  #61535 closed Aug 5, 2025

• ENH: New method "ends" as a combination of “head” and "tail"

  #61860 closed Aug 5, 2025

• ENH: Images embedded in cells. The DISPIMG function of WPS

  #61888 closed Aug 5, 2025

• ENH: Add a safe Option to hash_pandas_object with Default Value Set to True

  #60428 closed Aug 5, 2025

• BUG: alpine 3.21 install issue

  #60554 closed Aug 5, 2025

• ENH: Add an iterdicts() function

  #60901 closed Aug 5, 2025

• BUG: Pandas resets counter when using filterwarning "once"

  #60664 closed Aug 5, 2025

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

  #60786 closed Aug 5, 2025

• ENH: Add a function like PYQT signal

  #61829 closed Aug 5, 2025

• BUG: 'Sphinx parallel build error' when building docs locally prevents index.html creation

  #61975 closed Aug 5, 2025

• DOC: Series and DataFrame.reindex accepts Timedelta as tolerance, which is not documented

  #62010 closed Aug 5, 2025

• QST: best way to extend/subclass pandas.DataFrame

  #61362 closed Aug 5, 2025

• ENH: Add a name parameter to value_counts()

  #55121 closed Aug 5, 2025

• BUG: Can't convert `int64[pyarrow]` series with missing values to legacy numpy `float` series

  #57093 closed Aug 5, 2025

• issubdtype(<categorical>, np.bool_) raises error

  #9581 closed Aug 2, 2025

• API: Expand read_csv dtype for categoricals

  #14503 closed Aug 2, 2025

• Dask shuffle performance help

  #43155 closed Aug 2, 2025

• ENH: to_offset "year"/"quarter"/"month"/"day"/...?

  #34586 closed Aug 2, 2025

• inf comparison doesn't emulate NaN with use_inf_as_null

  #16756 closed Aug 1, 2025

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

  #61662 closed Aug 1, 2025

• BUG: Inconsistent `datetime` dtype based on how the dataframe gets initialized

  #61993 closed Jul 31, 2025

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

  #61627 closed Jul 31, 2025

• BUG: Writing UUIDs fail

  #61602 closed Jul 31, 2025

• DOC:

  #55125 closed Jul 30, 2025

12 Issues opened by 9 people

• ENH: pd.DataFrame.describe(): rename top to mode

  #62056 opened Aug 6, 2025

• BUG: ArrowEA.astype to categorical returning all-NaT

  #62051 opened Aug 5, 2025

• ENH: String functions for df.aggregate()

  #62050 opened Aug 5, 2025

• BUG: rank with object dtype and small values

  #62036 opened Aug 3, 2025

• BUG: Wrong inferred type in case of a mixture of boolean, float and integers

  #62033 opened Aug 3, 2025

• BUG: NaN vs NA in mixed reduction

  #62024 opened Aug 2, 2025

• DEPR: convert_dtypes keywords

  #62022 opened Aug 2, 2025

• BUG: pd.api.types.is_signed_integer_dtype(np.floating) throws TypeError

  #62018 opened Aug 1, 2025

• BUG: Sql select from database type cast issue

  #62013 opened Jul 31, 2025

• BUG: `assert_series_equal` broken with `check_category_order=False` for arrays with null values

  #62008 opened Jul 31, 2025

• BUG: `IntervalArray.overlaps()` documents that it accepts another `IntervalArray`, but it is not implemented

  #62004 opened Jul 30, 2025

• ENH: error messages for missing performance dependencies should point out the options

  #62001 opened Jul 30, 2025

75 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.

• API: offsets.Day is always calendar-day

  #61985 commented on Aug 6, 2025 • 23 new comments

• BUG: Fix ExtensionArray binary op protocol

  #61990 commented on Aug 6, 2025 • 8 new comments

• BUG: IntervalIndex.unique() only contains the first interval if all interval borders are negative

  #61920 commented on Aug 1, 2025 • 4 new comments

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

  #60772 commented on Jul 30, 2025 • 3 new comments

• BUG: Fix Series.str.contains with compiled regex on Arrow string dtype (#61942)

  #61946 commented on Jul 30, 2025 • 3 new comments

• ENH: usecols takes input order for read_csv implementation review

  #61967 commented on Aug 5, 2025 • 3 new comments

• ENH: Implement PDEP-17

  #61468 commented on Aug 4, 2025 • 2 new comments

• BUG: Fix Series.reindex losing values when reindexing to MultiIndex

  #61969 commented on Aug 1, 2025 • 1 new comment

• ENH: Function‑scoped bad‑line callback for read_csv that provides line_number (immediate per‑row handling without global side‑effects)

  #61978 commented on Aug 6, 2025 • 0 new comments

• BUG: many dataframe operations broken when a column contains numpy structured array

  #60108 commented on Aug 6, 2025 • 0 new comments

• BUG: read_csv loses precision when `engine='pyarrow'` and dtype Int64

  #56136 commented on Aug 5, 2025 • 0 new comments

• REF: dtype_backend argument in sql module mixes lib.no_default and numpy

  #60326 commented on Aug 5, 2025 • 0 new comments

• DOC: use shared_docs for isna/notna & isnull/notnull

  #17096 commented on Aug 5, 2025 • 0 new comments

• ENH: unset_index method

  #60869 commented on Aug 5, 2025 • 0 new comments

• ENH: Support for list of intervals / IntervalArray in to_parquet

  #34644 commented on Aug 5, 2025 • 0 new comments

• Should IntegerArray provide data / mask through an API?

  #34873 commented on Aug 5, 2025 • 0 new comments

• Follow-up on basic FloatingArray implementation

  #38110 commented on Aug 5, 2025 • 0 new comments

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

  #60813 commented on Aug 5, 2025 • 0 new comments

• Understanding string interning in pd.read_csv vs. other methods of creating large object columns

  #52639 commented on Aug 5, 2025 • 0 new comments

• DOC: Sort the pandas API reference navbar in alphabetical order

  #59164 commented on Aug 4, 2025 • 0 new comments

• DOC: Fix docstring validation errors for pandas.core.groupby

  #60365 commented on Aug 4, 2025 • 0 new comments

• Dtype inconsistency when appending to empty dataframe

  #22621 commented on Aug 4, 2025 • 0 new comments

• ENH: Include df.attrs in to_csv output

  #53577 commented on Aug 2, 2025 • 0 new comments

• BUG: .round causes TypeError / NaN-

  #61712 commented on Aug 6, 2025 • 0 new comments

• DOC: Add link to the "try pandas online" in the regular documentation

  #61060 commented on Aug 6, 2025 • 0 new comments

• Add `strict_na` keyword to the assert_.._equal methods for object dtype to help with deprecation

  #58072 commented on Aug 5, 2025 • 0 new comments

• ENH: support reading directory in read_csv

  #61275 commented on Aug 2, 2025 • 0 new comments

• Implemented NumbaExecutionEngine

  #61487 commented on Jul 31, 2025 • 0 new comments

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

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

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

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

• API: consistent NaN treatment for pyarrow dtypes

  #61732 commented on Aug 2, 2025 • 0 new comments

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

  #61742 commented on Jul 31, 2025 • 0 new comments

• DOC: mention .attrs are preserved in Parquet IO for pyarrow engine

  #61912 commented on Jul 31, 2025 • 0 new comments

• CoW: add readonly flag to ExtensionArrays, return read-only EA/ndarray in .array/EA.to_numpy()

  #61925 commented on Aug 3, 2025 • 0 new comments

• Updating error message to include more details about dataframe

  #61929 commented on Jul 30, 2025 • 0 new comments

• BUG FIX: Using Series.str.fullmatch() and Series.str.match() with a compiled regex fails with arrow strings

  #61964 commented on Jul 30, 2025 • 0 new comments

• TST: run python-dev CI on 3.14-dev

  #61950 commented on Aug 3, 2025 • 0 new comments

• DOC: added button to edit on GitHub

  #61956 commented on Aug 4, 2025 • 0 new comments

• ENH: Disallow duplicate column names everywhere by default

  #53217 commented on Aug 2, 2025 • 0 new comments

• ENH: Include `df.attrs` in `to_json` output

  #51012 commented on Aug 2, 2025 • 0 new comments

• BUG: Read hdfs:/// is broken since 2.1.0

  #58078 commented on Aug 1, 2025 • 0 new comments

• ENH: convert masked arrays for Series

  #20427 commented on Aug 1, 2025 • 0 new comments

• Read_csv leaks memory when used in multiple threads

  #19941 commented on Aug 1, 2025 • 0 new comments

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

  #61473 commented on Aug 1, 2025 • 0 new comments

• DOC: Docstring for BooleanDType inconsistent with the rest of repo

  #61939 commented on Aug 1, 2025 • 0 new comments

• BUG: read_sql no longer works simply with SqlAlchemy selectables and a quick fix

  #35484 commented on Jul 31, 2025 • 0 new comments

• BUG: Merge fails on pyarrow datetime columns

  #61926 commented on Jul 31, 2025 • 0 new comments

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

  #61632 commented on Jul 31, 2025 • 0 new comments

• BUG: series.groupby(level=0) and series.groupby(pd.Grouper(level=0)) produce different orders

  #61943 commented on Jul 30, 2025 • 0 new comments

• BUG: The lines skipped by pd.read_csv(path, chunksize=n, on_bad_lines='skip') depends on `n`.

  #61973 commented on Jul 30, 2025 • 0 new comments

• DOC: add button to edit on GitHub

  #39859 commented on Jul 30, 2025 • 0 new comments

• ENH: error message context.

  #61834 commented on Jul 30, 2025 • 0 new comments

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

  #54466 commented on Jul 30, 2025 • 0 new comments

• BUG: Inconsistent .values NA/NaN

  #61856 commented on Jul 30, 2025 • 0 new comments

• BUG: CustomBusinessDay not respecting calendar

  #60647 commented on Jul 30, 2025 • 0 new comments

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

  #61466 commented on Jul 30, 2025 • 0 new comments

• BUG: Different initialization methods lead to different dtypes (DataFrame)

  #42971 commented on Aug 4, 2025 • 0 new comments

• BUG: Empty list passed to `Series` returns `object` dtype, but via `DataFrame` returns `float64`

  #56679 commented on Aug 4, 2025 • 0 new comments

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

  #60159 commented on Aug 4, 2025 • 0 new comments

• dtype-unaware (empty) objects ("any" dtype)

  #19647 commented on Aug 4, 2025 • 0 new comments

• BUG: Instantiating pandas._libs.parsers.TextReader segfaults

  #53131 commented on Aug 4, 2025 • 0 new comments

• BUG: Python 3.14 may not increment refcount

  #61368 commented on Aug 3, 2025 • 0 new comments

• API: resolution for date_range, to_datetime, timedelta_range, to_timedelta

  #49060 commented on Aug 3, 2025 • 0 new comments

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

  #52653 commented on Aug 3, 2025 • 0 new comments

• BUG/API: round-tripping non-nano datetime64s with to_json/read_json

  #55827 commented on Aug 3, 2025 • 0 new comments

• API: timestamp resolution inference - default to one unit (if possible) instead of being data-dependent?

  #58989 commented on Aug 3, 2025 • 0 new comments

• BUG: ValueError: Buffer dtype mismatch, expected 'intp_t' but got 'long long' on ARMv7 32 bit

  #55305 commented on Aug 2, 2025 • 0 new comments

• BUG: Implicit upcast to float64 for large series (more than 1000000 rows)

  #61951 commented on Aug 2, 2025 • 0 new comments

• Add axis argument to DataFrame.corr

  #35002 commented on Aug 2, 2025 • 0 new comments

• ENH: .interval accessor

  #16401 commented on Aug 2, 2025 • 0 new comments

• Groupby.mode() - feature request

  #19254 commented on Aug 2, 2025 • 0 new comments

• ENH: Add Support for GroupBy Numeric Operations

  #20060 commented on Aug 2, 2025 • 0 new comments

• ENH: Implementing NEP 18's __array_function__

  #26380 commented on Aug 2, 2025 • 0 new comments

• Idea: Make pd.Index.values not writable

  #33001 commented on Aug 2, 2025 • 0 new comments

• QST: "Dummy" is rooted in ableist language

  #35724 commented on Aug 2, 2025 • 0 new comments