12 Pull requests merged by 10 people

• DOC: User Guide Page on user-defined functions

  #61195 merged May 18, 2025

• DOC: fix typo in merging.rst

  #61449 merged May 17, 2025

• DOC: Skip parallel_coordinaes, andrews_curves doctests

  #61448 merged May 16, 2025

• CI: clean up wheel build workarounds now that Cython 3.1.0 is out

  #61446 merged May 16, 2025

• BLD: Try using shared memory utilities in Cython to reduce wheel sizes

  #61384 merged May 16, 2025

• CI: Upgrade to ubuntu-24.04, install Python free threading from conda-forge

  #61410 merged May 15, 2025

• BUG: Impossible creation of array with dtype=string

  #61263 merged May 15, 2025

• ENH: Implement pandas.read_iceberg

  #61383 merged May 14, 2025

• Backport PR #61423: CI: Fix test failures in 32-bit environment

  #61437 merged May 13, 2025

• CI: Fix test failures in 32-bit environment

  #61423 merged May 13, 2025

• BLD: Decrease size of docker image

  #61430 merged May 12, 2025

• DOC: Updates to documentation - io.rst

  #61429 merged May 12, 2025

6 Pull requests opened by 5 people

• ENH: Implemented MultiIndex.searchsorted method ( GH14833)

  #61435 opened May 12, 2025

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

  #61441 opened May 14, 2025

• BUG: Fix Dataframe handling of scalar Timestamp #61444

  #61450 opened May 17, 2025

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

  #61451 opened May 17, 2025

• TYP: Update typing for 3.10

  #61453 opened May 18, 2025

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

  #61454 opened May 18, 2025

8 Issues closed by 2 people

• DOC: Write user guide page on apply/map/transform methods

  #61126 closed May 18, 2025

• BUG: Compiler Flag Drift May Affect Pandas ABI Stability via Memory Assumptions

  #61452 closed May 18, 2025

• BUG: DataFrame column assignment with pd.Timestamp leads to unexpected dtype and incorrect JSON output

  #61444 closed May 17, 2025

• BUG: read_csv silently ignores out of bounds errors when parsing date columns

  #61447 closed May 17, 2025

• BUG: Impossible creation of array with dtype=string

  #61155 closed May 15, 2025

• ENH: Add smart_groupby() method for automatic grouping by categorical columns and aggregating numerics

  #61420 closed May 14, 2025

• BUG: ImportError: cannot import name 'NaN' from 'numpy' in squeeze_pro.py

  #61438 closed May 14, 2025

• DOC: Broken Link in IO Tools - HDF5 Data Description

  #61428 closed May 12, 2025

9 Issues opened by 9 people

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

  #61445 opened May 16, 2025

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

  #61443 opened May 14, 2025

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

  #61442 opened May 14, 2025

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

  #61440 opened May 14, 2025

• BUG: Confusing Behavior When Assigning DataFrame Columns Using `omegaconf.ListConfig`

  #61439 opened May 14, 2025

• BUG: Joining Pandas with Polars dataframe produces fuzzy errormessage

  #61434 opened May 12, 2025

• BUG: Some `ExtensionArray`s can return 0-d Elements

  #61433 opened May 12, 2025

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

  #61432 opened May 12, 2025

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

  #61431 opened May 12, 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.

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

  #61138 commented on May 18, 2025 • 4 new comments

• TST: Testing for mixed int/str Index

  #61349 commented on May 18, 2025 • 4 new comments

• Bug cov nat

  #60898 commented on May 17, 2025 • 2 new comments

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

  #60772 commented on May 18, 2025 • 2 new comments

• CLN: Expose arguments in DataFrame.query

  #61413 commented on May 19, 2025 • 2 new comments

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

  #61422 commented on May 19, 2025 • 2 new comments

• ENH: Implement translations infrastructure

  #61380 commented on May 14, 2025 • 1 new comment

• Fix #61072: inconsistent fullmatch results with regex alternation

  #61343 commented on May 19, 2025 • 1 new comment

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

  #61399 commented on May 19, 2025 • 1 new comment

• ENH: Reimplement DataFrame.lookup

  #61185 commented on May 18, 2025 • 1 new comment

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

  #61381 commented on May 18, 2025 • 0 new comments

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

  #61320 commented on May 19, 2025 • 0 new comments

• BUG: Raise error if not busdaycalendar

  #61250 commented on May 17, 2025 • 0 new comments

• BUG: Pyarrow timestamp support for map() function

  #61236 commented on May 19, 2025 • 0 new comments

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

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

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

  #61225 commented on May 17, 2025 • 0 new comments

• BUG: fix to_json on period

  #61203 commented on May 15, 2025 • 0 new comments

• DataFrame.dtypes.to_json OverflowError: Maximum recursion level reached

  #61171 commented on May 17, 2025 • 0 new comments

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

  #61143 commented on May 17, 2025 • 0 new comments

• BUG: Collision between equivalent frequencies 'QS-…

  #61142 commented on May 17, 2025 • 0 new comments

• Pivot_table drop rows whose entries are all NaN

  #21969 commented on May 14, 2025 • 0 new comments

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

  #50371 commented on May 14, 2025 • 0 new comments

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

  #61402 commented on May 15, 2025 • 0 new comments

• ENH: Support for Python 3.13.2 free-threading version

  #60972 commented on May 16, 2025 • 0 new comments

• Updating value of a single row of a column using loc or at fails

  #22040 commented on May 16, 2025 • 0 new comments

• BUG: CustomBusinessDay not respecting calendar

  #60647 commented on May 17, 2025 • 0 new comments

• BUG: df.rolling.{std, skew, kurt} gives unexpected value

  #61416 commented on May 17, 2025 • 0 new comments

• RLS: 2.3

  #59664 commented on May 17, 2025 • 0 new comments

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

  #55231 commented on May 18, 2025 • 0 new comments

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

  #61418 commented on May 18, 2025 • 0 new comments

• ENH: Enable nsmallest/nlargest on object dtype

  #61166 commented on May 18, 2025 • 0 new comments

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

  #61353 commented on May 19, 2025 • 0 new comments

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

  #60098 commented on May 19, 2025 • 0 new comments

• DEPS: Revert SQLAlchemy minimum version back to 1.4.36

  #60977 commented on May 19, 2025 • 0 new comments

• BUG: Fix return type of loc/iloc

  #61054 commented on May 13, 2025 • 0 new comments

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

  #61061 commented on May 18, 2025 • 0 new comments

• Bug: Fix for overflow at edge cases in `normalize()` by raising exception

  #61083 commented on May 17, 2025 • 0 new comments

• BUG: Passing original properties of `DataFrame` and `Series` subclasses to their constructors

  #61101 commented on May 17, 2025 • 0 new comments