14 Pull requests merged by 10 people

• BUG: Fix #46726; wrong result with varying window size min/max rolling calc.

  #61288 merged Apr 25, 2025

• DOC: Updated groupby.expanding arguments

  #61352 merged Apr 25, 2025

• BUG: pivot_table with overlapping values

  #61293 merged Apr 23, 2025

• DOC Update link to "The Grammar of Graphics" book

  #61341 merged Apr 23, 2025

• ENH: Add tzdata to hard dependencies

  #61308 merged Apr 22, 2025

• ENH: Update DataFrame.to_stata to handle pd.NA and None values in strL columns

  #61286 merged Apr 22, 2025

• DOC: Updated groupby.ewm arguments

  #61334 merged Apr 22, 2025

• TYP: Remove unused mypy ignores

  #61330 merged Apr 21, 2025

• DEPS: Bump optional dependencies

  #60655 merged Apr 21, 2025

• [minor edit] fix typo: psudocode -> pseudocode

  #61314 merged Apr 21, 2025

• DOC: Add missing punctuation to merging.rst

  #61315 merged Apr 21, 2025

• Remove WillAyd from CODEOWNERS

  #61329 merged Apr 21, 2025

• BUG(string dtype): groupby/resampler.min/max returns float on all NA strings

  #60985 merged Apr 19, 2025

• WEB: Update benchmarks page

  #61289 merged Apr 19, 2025

14 Pull requests opened by 11 people

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

  #61320 opened Apr 20, 2025

• Fix: AttributeError when using .iloc with pyarrow-backed Series in Pandas #61311

  #61321 opened Apr 20, 2025

• add test case for mixed string and int

  #61325 opened Apr 21, 2025

• DEPS: Clean unused dependencies

  #61331 opened Apr 21, 2025

• CLN: Use newer numpy random Generator methods in plotting colors

  #61332 opened Apr 21, 2025

• CI: Have dedicated Python 3.13 job instead of using Python dev

  #61333 opened Apr 21, 2025

• BUG: Fixed issue with bar plots not stacking correctly when 'stacked' and 'subplots' are used together

  #61340 opened Apr 23, 2025

• Fix #61072: inconsistent fullmatch results with regex alternation

  #61343 opened Apr 23, 2025

• Update groupby().first() documentation to clarify behavior with missing data (#27578)

  #61345 opened Apr 23, 2025

• Mixed int string

  #61348 opened Apr 24, 2025

• Issue tm

  #61349 opened Apr 24, 2025

• Add warning to `.groupby` when null keys would be dropped due to default `dropna`

  #61351 opened Apr 24, 2025

• Improve documentation for MonthEnd and YearBegin offsets

  #61358 opened Apr 26, 2025

• BUG: Raise ValueError for non-string columns in read_json orient='table' (GH19129)

  #61359 opened Apr 26, 2025

21 Issues closed by 6 people

• BUG: Partially incorrect results when using a custom indexer for a rolling window for max and min

  #46726 closed Apr 25, 2025

• BUG: datetime ExtensionDtype do not work with DataFrame

  #35767 closed Apr 24, 2025

• Missing Imports

  #28133 closed Apr 24, 2025

• ENH: value_counts to produce both count and normalized

  #60385 closed Apr 24, 2025

• ENH: "forward rolling" - where instead of looking back at previous values, you look ahead at future values

  #60472 closed Apr 24, 2025

• ENH: Unique key detection function

  #60298 closed Apr 24, 2025

• BUG: concat with datetime index returns Series instead of scalar if microsecond=0

  #57835 closed Apr 24, 2025

• BUG: Series of bools with length mismatch does not raise when used with `.iloc`

  #61344 closed Apr 24, 2025

• BUG: Concatenating data frames with `MultiIndex` with `datetime64[ms]` dtype introduces `NaT` values to the index

  #61342 closed Apr 24, 2025

• ENH: th elements from Styler need the row scope

  #61350 closed Apr 24, 2025

• BUG: `values` argument ignored when also supplied to `index`/`columns` in `pivot_table`

  #61292 closed Apr 23, 2025

• BUG: pandas pivot_table count over a dataframe with 2 columns results in empty dataset when using aggfunc="count"

  #57876 closed Apr 23, 2025

• ENH: IDEA Introduce axis→0/axis→1 arrow aliases to disambiguate direction vs. label operations

  #61336 closed Apr 23, 2025

• ENH: Add `tzdata` to the `_hard_dependencies`

  #61273 closed Apr 22, 2025

• BUG: Period datatype data gets mangled up in pivoting operation

  #61338 closed Apr 22, 2025

• ENH: inspect duplicate rows for columns that vary

  #61318 closed Apr 21, 2025

• ENH: grep-like select columns of a DataFrame by a part of their names

  #61319 closed Apr 21, 2025

• BUG: no last function in window rolling

  #61310 closed Apr 21, 2025

• BUG: duplicated() is reporting rows as duplicates when they aren't upon visual inspection.

  #61312 closed Apr 19, 2025

• BUG: Inconsistent dtype with GroupBy for StrDtype and all missing values

  #60810 closed Apr 19, 2025

• BUG: to_latex, when escaped=True, doesn't escape columns name

  #61309 closed Apr 19, 2025

14 Issues opened by 11 people

• ENH: magic_case()

  #61360 opened Apr 26, 2025

• DOC: change `tuples` param for MultiIndex.from_tuples from sequence to iterable

  #61357 opened Apr 25, 2025

• BUG: `DataFrameGroupBy.groups` fails when Categorical indexer contains NaNs and `dropna=False`

  #61356 opened Apr 25, 2025

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

  #61353 opened Apr 25, 2025

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

  #61347 opened Apr 24, 2025

• BUG: assignment via loc silently fails with differing dtypes

  #61346 opened Apr 23, 2025

• ENH: Add warning when `DataFrame.groupby` drops NA keys

  #61339 opened Apr 22, 2025

• BUG: DataFrame.to_markdown exception when a cell has numpy.array type

  #61337 opened Apr 22, 2025

• BUG: pre-commit version 4.0.0 is required

  #61328 opened Apr 21, 2025

• BUG: to_dict(orient='dict') does not convert np.nan to None in Pandas 2.2.3

  #61323 opened Apr 21, 2025

• BUG: memory issues with `string[pyarrow]` after sorted `pd.merge`

  #61322 opened Apr 20, 2025

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

  #61317 opened Apr 20, 2025

• BUG: `.to_parquet` fails with `schema` for `string[pyarrow]` but not `string[python]`

  #61316 opened Apr 20, 2025

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

  #61311 opened Apr 19, 2025

38 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: User Guide Page on user-defined functions

  #61195 commented on Apr 26, 2025 • 14 new comments

• BUG: Fix scatter plot colors in groupby context to match line plot behavior (#59846)

  #61233 commented on Apr 25, 2025 • 10 new comments

• EHN: `df.to_latex(escape=True)` also escape index names

  #61307 commented on Apr 26, 2025 • 7 new comments

• PDEP-8: Inplace methods in pandas

  #51466 commented on Apr 23, 2025 • 3 new comments

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

  #60772 commented on Apr 20, 2025 • 1 new comment

• ENH: Added dict support for `pd.set_option`

  #61151 commented on Apr 26, 2025 • 1 new comment

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

  #61234 commented on Apr 25, 2025 • 1 new comment

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

  #61226 commented on Apr 22, 2025 • 0 new comments

• BUG: Fix return type of loc/iloc

  #61054 commented on Apr 19, 2025 • 0 new comments

• BUG: Impossible creation of array with dtype=string

  #61263 commented on Apr 25, 2025 • 0 new comments

• ENH: Allow `s.map(d, na_action='raise')`

  #60482 commented on Apr 20, 2025 • 0 new comments

• PDEP-11: Change default of dropna to False

  #53094 commented on Apr 23, 2025 • 0 new comments

• [WIP] ENH: support reading directory in read_csv

  #61275 commented on Apr 22, 2025 • 0 new comments

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

  #61093 commented on Apr 26, 2025 • 0 new comments

• BUG: DataFrame.min with skipna=True raises TypeError when column contains np.nan and datetime.date

  #61204 commented on Apr 26, 2025 • 0 new comments

• ENH: Add read_dbf method

  #61306 commented on Apr 26, 2025 • 0 new comments

• BUG: df.plot() "Subplots" changes behavior of how values are stacked using the "Stacked" property

  #61018 commented on Apr 25, 2025 • 0 new comments

• DOC: Series.update throws a `FutureWarning` about `def[col] = df[col].method` but `.update` returns `None` and works `inplace`

  #59788 commented on Apr 25, 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 Apr 25, 2025 • 0 new comments

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

  #61294 commented on Apr 19, 2025 • 0 new comments

• BUG: NA are coerced in to NaN by concat

  #61303 commented on Apr 19, 2025 • 0 new comments

• method `df.merge` is resetting the index

  #51796 commented on Apr 20, 2025 • 0 new comments

• BUG: datetime64 can't be compared with pyarrow-backed variant

  #60937 commented on Apr 20, 2025 • 0 new comments

• ENH: Enable nsmallest/nlargest on object dtype

  #61166 commented on Apr 21, 2025 • 0 new comments

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

  #61232 commented on Apr 21, 2025 • 0 new comments

• TST: mixed_int_string Index

  #54072 commented on Apr 22, 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 Apr 22, 2025 • 0 new comments

• ENH: adding a filter (and bold) to header when writing to excel

  #61194 commented on Apr 22, 2025 • 0 new comments

• ENH: Export (a subset of?) pandas._typing for type checking

  #55231 commented on Apr 22, 2025 • 0 new comments

• DOC: Reindexing behaviour of dataframe column-assignment missing

  #39845 commented on Apr 23, 2025 • 0 new comments

• BUG: `.map` & `.apply` would convert element type for extension array.

  #60766 commented on Apr 23, 2025 • 0 new comments

• DEPR: Some dropna behaviors in DataFrame.pivot_table

  #53521 commented on Apr 23, 2025 • 0 new comments

• Improve plotting Timedelta on y-axis (Timedelta string representation)

  #17553 commented on Apr 23, 2025 • 0 new comments

• TRACKER: Getting Started with Meson/Bug Reports

  #49683 commented on Apr 24, 2025 • 0 new comments

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

  #58829 commented on Apr 24, 2025 • 0 new comments

• DOC: min_itemsize for HDFStore append for encoded strings

  #14601 commented on Apr 24, 2025 • 0 new comments

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

  #19082 commented on Apr 24, 2025 • 0 new comments

• config.register_option allows registering invalid options

  #29242 commented on Apr 25, 2025 • 0 new comments