11 Pull requests merged by 10 people

• 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

• DOC: update pandas cheat sheet with a third page (fixes #40680)

  #61378 merged May 11, 2025

• String dtype: more informative repr (keeping brief __str__)

  #61148 merged May 10, 2025

• DOC: Updated titanic.rst survived description

  #61421 merged May 9, 2025

6 Pull requests opened by 6 people

• GH61405 Expose arguments in DataFrame.query

  #61413 opened May 9, 2025

• Bug fix slow plot with datetimeindex

  #61414 opened May 9, 2025

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

  #61422 opened May 9, 2025

• BUG: Fix memory leak when slicing Series and assigning to self

  #61426 opened May 10, 2025

• Searchsorted branch

  #61435 opened May 12, 2025

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

  #61441 opened May 14, 2025

26 Issues closed by 5 people

• 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

• DOC: Additional items for the cheat sheet

  #40680 closed May 11, 2025

• REGR: comparison op with dask data structure fails

  #38946 closed May 10, 2025

• REF: use common utilities when implementing EA._get_common_dtype

  #43454 closed May 10, 2025

• ENH: Default negative location in pandas insert

  #49496 closed May 10, 2025

• BUG: comparing multicolumn dataframe with datetime64 values to series gives TypeError

  #9006 closed May 10, 2025

• REGR: Comparing timestamp to empty Series raises TypeError starting in 0.25.0

  #35548 closed May 10, 2025

• ENH: improve the resulting dtype for groupby operations on nullable dtypes

  #37494 closed May 10, 2025

• REGR: setting column with setitem should not modify existing array inplace

  #33457 closed May 10, 2025

• Type hint of DataFrame(...dtype...) excludes numpy scalar types such as np.int8

  #31872 closed May 10, 2025

• DEPR/API: tuples in labels

  #24688 closed May 10, 2025

• BUG: `DataFrame.convert_dtypes()` converting `object` to `pd.ArrowDtype` instead of `pd.StringDtype`

  #50971 closed May 10, 2025

• DOC: Remove internally used/private parameters from method signatures

  #52028 closed May 10, 2025

• ENH: na_rep='=na()' as default value

  #52258 closed May 10, 2025

• API: inconsistencies between grouped and grouped[['col']] in groupby

  #21790 closed May 10, 2025

• Direct delegation of Series methods to ExtensionArrays

  #21305 closed May 10, 2025

• DataFrame.groupby().sum() treating Nan as 0.0

  #20824 closed May 10, 2025

• DOC: to quote or not to quote

  #19750 closed May 10, 2025

• BUG: race condition in Index.is_unique

  #21150 closed May 10, 2025

• BUILD: Missing Windows free-threading wheel

  #61419 closed May 10, 2025

• i want to develop one feature in pandas

  #61424 closed May 10, 2025

• DOC: Error in Getting started tutorials > How do I read and write tabular data?

  #61412 closed May 9, 2025

• BUG: ImportError: cannot import name 'NaN' from 'numpy'

  #61415 closed May 9, 2025

15 Issues opened by 15 people

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

  #61445 opened May 16, 2025

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

  #61444 opened May 15, 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

• ENH: access arrow-backed map as a python dictionary

  #61427 opened May 10, 2025

• BUG(string dtype): Arithmetic operations between Series with string dtype index

  #61425 opened May 10, 2025

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

  #61418 opened May 9, 2025

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

  #61417 opened May 9, 2025

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

  #61416 opened May 9, 2025

25 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.

• TST: Testing for mixed int/str Index

  #61349 commented on May 15, 2025 • 4 new comments

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

  #61138 commented on May 14, 2025 • 3 new comments

• ENH: Implement translations infrastructure

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

• BLD: allow to build with non-MSVC compilers on Windows

  #61404 commented on May 9, 2025 • 0 new comments

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

  #61399 commented on May 14, 2025 • 0 new comments

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

  #61381 commented on May 11, 2025 • 0 new comments

• [WIP] ENH: support reading directory in read_csv

  #61275 commented on May 11, 2025 • 0 new comments

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

  #61226 commented on May 15, 2025 • 0 new comments

• BUG: fix to_json on period

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

• BUG: Fix return type of loc/iloc

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

• Bug cov nat

  #60898 commented on May 15, 2025 • 0 new comments

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

  #60772 commented on May 13, 2025 • 0 new comments

• RLS: 2.3

  #59664 commented on May 15, 2025 • 0 new comments

• BUG: CustomBusinessDay not respecting calendar

  #60647 commented on May 15, 2025 • 0 new comments

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

  #61402 commented on May 15, 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

• Pivot_table drop rows whose entries are all NaN

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

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

  #22040 commented on May 13, 2025 • 0 new comments

• About the internationalization of documentation

  #56301 commented on May 12, 2025 • 0 new comments

• Multiarray searchsorted fails

  #14833 commented on May 11, 2025 • 0 new comments

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

  #61194 commented on May 11, 2025 • 0 new comments

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

  #60640 commented on May 10, 2025 • 0 new comments

• Metadata generation failed when installing PyQt5

  #61037 commented on May 10, 2025 • 0 new comments

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

  #60039 commented on May 10, 2025 • 0 new comments

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

  #61398 commented on May 9, 2025 • 0 new comments