15 Pull requests merged by 10 people

• BUG: Fix Series.str.contains with compiled regex on Arrow string dtype

  #61946 merged Aug 14, 2025

• BUG: fix Series.str.fullmatch() and Series.str.match() with a compiled regex failing with arrow strings

  #61964 merged Aug 14, 2025

• DOC: Add to_julian_date to DatetimeIndex methods listing

  #62090 merged Aug 13, 2025

• ENH: Warn on unused arguments to resample

  #62101 merged Aug 13, 2025

• ENH: Implement PDEP-17

  #61468 merged Aug 12, 2025

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

  #62053 merged Aug 12, 2025

• DEPS: Bump adbc-driver-postgresql/sqlite to 1.2

  #62065 merged Aug 11, 2025

• DEPS: update python version in dockerfile

  #62088 merged Aug 11, 2025

• BUG: Preserve column names in DataFrame.from_records when nrows=0

  #62085 merged Aug 11, 2025

• REF: split big method in pyarrow csv wrapper

  #62087 merged Aug 11, 2025

• API: offsets.Day is always calendar-day

  #61985 merged Aug 11, 2025

• BUG: Fix tz_localize(None) with Arrow timestamp

  #62076 merged Aug 11, 2025

• DEPS: Drop Python 3.10

  #62066 merged Aug 8, 2025

• MNT: migrate from codecs.open to open

  #62073 merged Aug 8, 2025

• BUG(CoW): also raise for chained assignment for .at / .iat

  #62074 merged Aug 8, 2025

19 Pull requests opened by 18 people

• Update pytables.py to include a more thorough description of the min_itemsize variable

  #62068 opened Aug 8, 2025

• Test chained assignment detection for Python 3.14

  #62070 opened Aug 8, 2025

• DOC: Fix docstring validation errors for pandas.util.hash_pandas_object

  #62075 opened Aug 8, 2025

• BUG: Bug fix for implicit upcast to float64 for large series (more than 1000000 rows)

  #62077 opened Aug 8, 2025

• DOC: Validate docstrings for tseries.offsets.BusinessDay

  #62078 opened Aug 9, 2025

• DOC: Add docstring for asarray_tuplesafe in common.py

  #62079 opened Aug 9, 2025

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

  #62080 opened Aug 9, 2025

• BUG: Series.round with pd.NA no longer raises; coerce object+NA to nullable float and round; add test (#61712)

  #62081 opened Aug 9, 2025

• DOC: clarify Series alignment when assigning to DataFrame column (GH#39845)

  #62082 opened Aug 9, 2025

• BUG: Preserve full float precision when double_precision=15 in to_jso…

  #62083 opened Aug 9, 2025

• DEPS: Bump meson-python, lower pin Cython

  #62086 opened Aug 10, 2025

• DOC: Improve consistency in terminology and fix minor typos in documentation

  #62091 opened Aug 12, 2025

• BUG: Fix assert_frame_equal with check_dtype=False for pd.NA with different dtypes

  #62092 opened Aug 12, 2025

• BUG: Preserve day freq on DatetimeIndex subtraction

  #62096 opened Aug 12, 2025

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

  #62099 opened Aug 12, 2025

• DEPR: Deprecate passing positional arguments in {DataFrame,Series}.groupby (except `by` and `level`)

  #62102 opened Aug 13, 2025

• RFC: Introduce `pandas.col`

  #62103 opened Aug 13, 2025

• CLN: Enforce deprecation of arg in Series.map

  #62104 opened Aug 14, 2025

• WIP/ENH: EA._cast_pointwise_result

  #62105 opened Aug 14, 2025

20 Issues closed by 7 people

• BUG: Using `Series.str.contains()` with a compiled regex and arrow strings fails

  #61942 closed Aug 14, 2025

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

  #61952 closed Aug 14, 2025

• BUG: numpy.datetime64 unit counts ignored

  #39977 closed Aug 14, 2025

• BUG: `tz_localize(None)` incorrectly converts timestamps when using `pyarrow` dtypes

  #62100 closed Aug 14, 2025

• Suggestion: Pop row or multiple rows from a DataFrame

  #19501 closed Aug 14, 2025

• ENH: Add `pd.read_soql()` for Salesforce data retrieval

  #60966 closed Aug 14, 2025

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

  #61566 closed Aug 14, 2025

• Output formatting: the repr of the Categorical categories (quoted or unquoted strings?)

  #61890 closed Aug 13, 2025

• CI Failures due to new scipy and new numpydoc

  #61740 closed Aug 13, 2025

• DEPR: behavior of `copy` argument in `df.reindex` is confusing

  #34663 closed Aug 13, 2025

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

  #56136 closed Aug 12, 2025

• BUG: `DataFrame.from_records()` ignores `columns` with iterator and `nrows=0`

  #61140 closed Aug 11, 2025

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

  #41943 closed Aug 11, 2025

• BUG: pd.date_range with DST-crossing has incorrect freq attribute

  #35388 closed Aug 11, 2025

• BUG: Incorrect freqstr "D" after timezone conversion

  #51716 closed Aug 11, 2025

• API: Breaking Changes in 3.0 (without deprecations)

  #44823 closed Aug 11, 2025

• BUG: tz_localize(None) with Arrow timestamp

  #61780 closed Aug 11, 2025

• BUG: Pandas to_datetime parsing error with "May" month

  #62084 closed Aug 11, 2025

• BLD: Drop Python 3.10 support

  #60059 closed Aug 9, 2025

• ENH: Persistent and Interoperable Accessors for NDFrame and Index (sliding window POC)

  #62064 closed Aug 8, 2025

9 Issues opened by 8 people

• `Documentation Improvement: Clarify setup steps and troubleshooting in CONTRIBUTING.md`

  #62107 opened Aug 14, 2025

• Documentation Improvement: Clarify steps for setting up local development environment in CONTRIBUTING.md

  #62106 opened Aug 14, 2025

• ENH: Remove the DataFrame.attrs saving to parquet metadata on Pandas' side

  #62098 opened Aug 12, 2025

• DEPR: rename 'unit' keyword in to_datetime etc

  #62097 opened Aug 12, 2025

• BUG: In main, TimedeltaIndex.shift() requires freq in the index, but it may not be available because it was computed

  #62094 opened Aug 12, 2025

• BUILD: Nightly wheel building failed for some platforms

  #62093 opened Aug 12, 2025

• ENH: More compact printing of a DataFrame with MultiIndex columns

  #62089 opened Aug 11, 2025

• BUG: DataFrame.to_json() does not accurately serialize floats such that they can be deserialized without lost information

  #62072 opened Aug 8, 2025

• BUG:Pandas: Custom Metadata in DataFrame Subclass Not Deep-Copied

  #62071 opened Aug 8, 2025

70 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.

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

  #61925 commented on Aug 13, 2025 • 1 new comment

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

  #57124 commented on Aug 14, 2025 • 0 new comments

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

  #62001 commented on Aug 14, 2025 • 0 new comments

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

  #60108 commented on Aug 14, 2025 • 0 new comments

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

  #58989 commented on Aug 14, 2025 • 0 new comments

• BUG: 1.5.0rc0 extract_links modifies type first item in tuple

  #48355 commented on Aug 14, 2025 • 0 new comments

• BUG: Behaviour of sum/mean on sparse boolean arrays changed between 1.5.3 and pandas 2.2

  #58015 commented on Aug 14, 2025 • 0 new comments

• ENH: Add argument "multiprocessing" to DataFrame.apply() method (any axis)

  #37956 commented on Aug 14, 2025 • 0 new comments

• read_excel provides uninformative error message when reading from sheet with duplicate multiindex columns

  #19395 commented on Aug 14, 2025 • 0 new comments

• DEPR: List of deprecations to be removed in 3.0

  #50578 commented on Aug 14, 2025 • 0 new comments

• Release GIL for Merge

  #13745 commented on Aug 14, 2025 • 0 new comments

• Categorical data not supported in plots of parallel coordinates

  #12341 commented on Aug 14, 2025 • 0 new comments

• ENH: cumcount() for DataFrames and Series

  #12648 commented on Aug 14, 2025 • 0 new comments

• ENH/API: Timeseries Arithmetic frequency Alignment

  #12426 commented on Aug 14, 2025 • 0 new comments

• API: handling of missing values in Index.__contains__

  #59765 commented on Aug 14, 2025 • 0 new comments

• API: `astype` method fails to raise errors for `category` data type

  #59899 commented on Aug 14, 2025 • 0 new comments

• Change default string storage from "python" to "pyarrow" (if installed) for for NA-variant of StringDtype

  #60287 commented on Aug 14, 2025 • 0 new comments

• ENH: preview_csv(***.csv) for Fast First-N-Line Preview on Large Plus Size (>100GB)

  #61281 commented on Aug 14, 2025 • 0 new comments

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

  #62055 commented on Aug 12, 2025 • 0 new comments

• BUG Updated border attribute to in-line CSS

  #62046 commented on Aug 8, 2025 • 0 new comments

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

  #62040 commented on Aug 13, 2025 • 0 new comments

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

  #62031 commented on Aug 13, 2025 • 0 new comments

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

  #62007 commented on Aug 8, 2025 • 0 new comments

• BUG: Fix ExtensionArray binary op protocol

  #61990 commented on Aug 13, 2025 • 0 new comments

• BUG: fix .str.isdigit to honor unicode superscript for older pyarrow

  #61962 commented on Aug 13, 2025 • 0 new comments

• Updating error message to include more details about dataframe

  #61929 commented on Aug 7, 2025 • 0 new comments

• DOC: Clarify broadcasting behavior when using lists in DataFrame arithmetic (GH18857)

  #61820 commented on Aug 11, 2025 • 0 new comments

• TST: assert reading of legacy pickles against current data

  #61792 commented on Aug 10, 2025 • 0 new comments

• API: consistent NaN treatment for pyarrow dtypes

  #61732 commented on Aug 11, 2025 • 0 new comments

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

  #61717 commented on Aug 14, 2025 • 0 new comments

• Parallelize test_sql.py - Issue #60378

  #61551 commented on Aug 10, 2025 • 0 new comments

• ENH: Support Plugin Accessors Via Entry Points

  #61499 commented on Aug 14, 2025 • 0 new comments

• ENH: support reading directory in read_csv

  #61275 commented on Aug 14, 2025 • 0 new comments

• DOC: Simplify pandas theme footer

  #51536 commented on Aug 14, 2025 • 0 new comments

• DEPR: pd.concat special cases DatetimeIndex to sort even when sort=False

  #57335 commented on Aug 14, 2025 • 0 new comments

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

  #61491 commented on Aug 14, 2025 • 0 new comments

• BUG: Boolean Column Indexing Issue in Pandas

  #61980 commented on Aug 12, 2025 • 0 new comments

• ENH: add `atol` to pd.DataFrame.compare()

  #54677 commented on Aug 12, 2025 • 0 new comments

• ENH adding metadata argument to DataFrame.to_parquet

  #20521 commented on Aug 12, 2025 • 0 new comments

• [Feature Request] Add `replace` method to `Index` objects

  #19495 commented on Aug 12, 2025 • 0 new comments

• DOC: `.str.cat` output in case of `Index` object

  #35556 commented on Aug 11, 2025 • 0 new comments

• DOC: Website should copy code only

  #56388 commented on Aug 11, 2025 • 0 new comments

• issue when shifting with Timedelta in a groupby

  #20492 commented on Aug 11, 2025 • 0 new comments

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

  #35484 commented on Aug 11, 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 11, 2025 • 0 new comments

• BUG: incorrect assumption of full-name month format when "May" is initial month

  #58328 commented on Aug 11, 2025 • 0 new comments

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

  #61632 commented on Aug 9, 2025 • 0 new comments

• DOC: Enforce Numpy Docstring Validation (Parent Issue)

  #58063 commented on Aug 9, 2025 • 0 new comments

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

  #59164 commented on Aug 8, 2025 • 0 new comments

• DEPR: List of deprecations to be removed in 4.0

  #56596 commented on Aug 8, 2025 • 0 new comments

• BUG: Python 3.14 may not increment refcount

  #61368 commented on Aug 8, 2025 • 0 new comments

• BUG: read_parquet converts pyarrow list type to numpy dtype

  #53011 commented on Aug 8, 2025 • 0 new comments

• BUG: .round causes TypeError / NaN-

  #61712 commented on Aug 8, 2025 • 0 new comments

• BUG: Inconsistent behavior of `MultiIndex.union` depending on duplicates and names

  #62059 commented on Aug 14, 2025 • 0 new comments

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

  #61675 commented on Aug 13, 2025 • 0 new comments

• ENH: pandas mutate, add R's mutate functionality to enable users to easily create new columns in data frames

  #56499 commented on Aug 13, 2025 • 0 new comments

• BUG: Using `/` operator with a `Path` and `Series` of string dtype fails

  #61940 commented on Aug 13, 2025 • 0 new comments

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

  #60301 commented on Aug 13, 2025 • 0 new comments

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

  #61466 commented on Aug 13, 2025 • 0 new comments

• BUG: Resampling a Series with a DST to 24 hours gives a different result depending on whether timedelta(hours=24) or "24H" was used.

  #35248 commented on Aug 13, 2025 • 0 new comments

• ENH: pd.to_sql(upsert=True, upsert_on_columns=['game_id'])

  #60434 commented on Aug 13, 2025 • 0 new comments

• BUG: inconsistent behavior and crash in `DataFrame.__setitem__` when >=3d ndarray is used

  #53366 commented on Aug 13, 2025 • 0 new comments

• BUG: is_scalar(Enum) gives False

  #62063 commented on Aug 12, 2025 • 0 new comments

• ENH: Functionality to aid with Database Imports

  #61247 commented on Aug 12, 2025 • 0 new comments

• ENH: Support attrs in feather files

  #60675 commented on Aug 12, 2025 • 0 new comments

• ENH: devcontainer & docker: use cases and improvements

  #54862 commented on Aug 12, 2025 • 0 new comments

• ENH: add errors='coerce' to DataFrame.astype

  #48781 commented on Aug 12, 2025 • 0 new comments

• ENH: Shall we let pd.NA * 0 equals to zero?

  #47117 commented on Aug 12, 2025 • 0 new comments

• ENH: Generalized head and tail method.

  #44384 commented on Aug 12, 2025 • 0 new comments

• Timestamp.strftime(): missing support for nanoseconds

  #29461 commented on Aug 12, 2025 • 0 new comments