Sourced from pyarrow's releases.

Apache Arrow 25.0.0

Release Notes URL: https://arrow.apache.org/release/25.0.0.html

• 59bea6e MINOR: [Release] Update versions for 25.0.0
• 381fab6 MINOR: [Release] Update .deb/.rpm changelogs for 25.0.0
• 7f72d5b MINOR: [Release] Update CHANGELOG.md for 25.0.0
• fe2f85c GH-50336: [Release][Archery] Fix archery GitHub integration for release scrip...
• c658548 GH-50293: [CI] Run check-labels for all triggers to avoid cancelling further ...
• f83c8ca GH-50330: [C++][R][Parquet] Add missing typename in RleBitPackedDecoderGetRun...
• 35e0f63 GH-50318: [R][CI] Install missing libpng-dev for test-r-linux-as-cran (#50328)
• 61ca7a9 GH-50295: [C++][R] #include <ranges> in vector_select_k.cc breaks macOS CRAN ...
• 1b6edb8 GH-50291: [Python][Packaging] Stop using nightly build dependencies for build...
• e183ea9 MINOR: [Docs] Add Timestamp With Offset to canonical extension types status (...
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Sourced from pandas's releases.

pandas 3.0.5

We are pleased to announce the release of pandas 3.0.5. This is a patch release in the 3.0.x series and includes some regression fixes and bug fixes. We recommend that all users of the 3.0.x series upgrade to this version.

See the full whatsnew for a list of all the changes.

Pandas 3.0 supports Python 3.11 and higher. The release can be installed from PyPI:

python -m pip install --upgrade pandas==3.0.*

Or from conda-forge

conda install -c conda-forge pandas=3.0

Please report any issues with the release on the pandas issue tracker.

Thanks to all the contributors who made this release possible.

• e68db09 RLS: 3.0.5
• 0697623 Backport PR #66428: DOC: update whatsnew for 3.0.5 (#66430)
• 5d846d0 Backport PR #66090 on branch 3.0.x (BLD: exclude numpy 2.5.0 when building wh...
• bef7a2b Backport PR #66169 on branch 3.0.x (CI: Fix pyarrow-nightly job (stale nightl...
• 8188eb1 RLS: 3.0.4 (#66079)
• bd35f15 [3.0.x] BUG: fix CoW issue in eval() (#66072)
• 6195872 [backport 3.0.x] BUG: anchor whole alternation in Series.str.match for PyArro...
• 70313be Backport PR #66051 on branch 3.0.x (BUG: fix regression in DataFrame setitem ...
• 57ed3e2 [backport 3.0.x] Bump pypa/cibuildwheel from 3.4.1 to 4.1.0 (#65934) (#66026)
• f9693fc [backport 3.0.x] BUG(pandas 3.0 regression): drop(index=...) doesn't accept N...
• Additional commits viewable in compare view

• f4bc676 2026.07.22 (#428)
• 4c91f9c Bump actions/setup-python from 6.3.0 to 7.0.0 (#427)
• 01a66c5 Bump actions/checkout from 7.0.0 to 7.0.1 (#426)
• eb355f4 Bump pypa/gh-action-pypi-publish from 1.14.0 to 1.14.1 (#425)
• 474e6fc Include tests in the source distribution (#424)
• a31ef39 Bump actions/setup-python from 6.2.0 to 6.3.0 (#420)
• 98eb2c7 Bump actions/checkout from 6.0.3 to 7.0.0 (#419)
• d0ac52f 2026.06.17 (#418)
• d46de62 Bump actions/checkout from 6.0.2 to 6.0.3 (#417)
• 6c183ec fix: update Requests docs link to canonical URL (#415)
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Sourced from requests's releases.

v2.34.2

2.34.2 (2026-05-14)

• Moved headers input type back to Mapping to avoid invariance issues with MutableMapping and inferred dict types. Users calling Request.headers.update() may need to narrow typing in their code. (#7441)

Full Changelog: https://github.com/psf/requests/blob/main/HISTORY.md#2342-2026-05-14

Sourced from requests's changelog.

2.34.2 (2026-05-14)

• Moved headers input type back to Mapping to avoid invariance issues with MutableMapping and inferred dict types. Users calling Request.headers.update() may need to narrow typing in their code. (#7441)

2.34.1 (2026-05-13)

Bugfixes

• Widened json input type from dict and list to Mapping and Sequence. (#7436)
• Changed headers input type to MutableMapping and removed None from Request.headers typing to improve handling for users. (#7431)
• Response.reason moved from str | None to str to improve handling for users. (#7437)
• Fixed a bug where some bodies with custom __getattr__ implementations weren't being properly detected as Iterables. (#7433)

2.34.0 (2026-05-11)

Announcements

• Requests 2.34.0 introduces inline types, replacing those provided by typeshed. Public API types should be fully compatible with mypy, pyright, and ty. We believe types are comprehensive but if you find issues, please report them to the pinned tracking issue.

  Special thanks to @​bastimeyer, @​cthoyt, @​edgarrmondragon, and @​srittau for helping review and test the types ahead of the release. (#7272)

Improvements

• Digest Auth hashing algorithms have added usedforsecurity=False to clarify security considerations. (#7310)
• Requests added support for Python 3.15 based on beta1. Downstream projects should be able to start testing prior to its release in October. (#7422)
• Requests added support for Python 3.14t. (#7419)

Bugfixes

• Response.history no longer contains a reference to itself, preventing accidental looping when traversing the history list. (#7328)
• Requests no longer performs greedy matching on no_proxy domains. The proxy_bypass implementation has been updated with CPython's fix from bpo-39057. (#7427)
• Requests no longer incorrectly strips duplicate leading slashes in URI paths. This should address user issues with specific presigned URLs. Note the full fix requires urllib3 2.7.0+. (#7315)

... (truncated)

• 6e83187 v2.34.2
• 84d10f0 Move Request.headers back to Mapping (#7441)
• b7b549b v2.34.1
• e511bc7 Fix mutability issues with headers input types (#7431)
• 5691f59 Update JsonType containers to read-based collections (#7436)
• 2144213 Constrain Response.reason to str (#7437)
• 6404f34 Fix prepare_body stream detection for __getattr__-based file wrappers (#7...
• See full diff in compare view

• 8a39635 Bump pylint to 4.0.6, update changelog (#11105)
• 150f23c [Backport maintenance/4.0.x] Allow digits in ParamSpec and TypeVarTuple names...
• 8b6251e [Backport maintenance/4.0.x] Fix crash when enum member inference fails (#11093)
• d57aadb [Backport maintenance/4.0.x] Fix implicit-str-concat false positive for mix...
• d9ea8d9 [Backport maintenance/4.0.x] Fix unnecessary-comprehension suggestion when ...
• cb1792a [Backport maintenance/4.0.x] Allow digits in TypeVar names for invalid-name c...
• ee2ab9a Handle InferenceError in decorator return analysis
• 5bb5498 [Backport maintenance/4.0.x] Fix crash in typecheck checker when metaclass ar...
• a940533 [Backport maintenance/4.0.x] Fix a crash in consider-using-enumerate for no...
• b7a873a [Backport maintenance/4.0.x] Fix crash in deprecated checker for non-string `...
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Sourced from ruff's releases.

0.16.0

Release Notes

Released on 2026-07-23.

Check out the blog post for a migration guide and overview of the changes!

Breaking changes

• Ruff now enables a much larger set of rules by default (413, up from 59). See the blog post for more details and the new Default Rules page for a full listing of the enabled rules. Note that this is primarily an expansion, but 18 of the more opinionated pycodestyle (E) and pyflakes (F) rules have been removed from the default set: E401, E402, E701, E702, E703, E711, E712, E713, E714, E721, E731, E741, E742, E743, F403, F405, F406, and F722.

• Ruff can now format Python code blocks in Markdown files and will do this by default. See the documentation for more details.

• Ruff now supports ruff: ignore comments at the ends of lines, like noqa comments, or on the line preceding a diagnostic. For example, these both suppress an unused-import (F401) diagnostic:

  import math  # ruff: ignore[F401]
  ruff: ignore[F401]
  import os

• Fixes are now shown in check and format --check output:

  ❯ ruff format --check .
  unformatted: File would be reformatted
   --> try.md:1:1
    |
  1 | ```python
    - import   math
  2 + import math
  3 | ```
    |
  1 file would be reformatted

  This example also shows off the Markdown formatting.

• format --check now supports the same output formats as the linter, including the github and gitlab outputs for rendering annotations in CI:

  ❯ ruff format --check --output-format github .
  ::error title=ruff (unformatted),file=try.md,line=2,col=8,endLine=2,endColumn=10::try.md:2:8: unformatted: File would be reformatted

  See the CLI help or documentation for the full list of supported formats.

• The filename, location, end_location, fix.edits[].location, and fix.edits[].end_location fields in the JSON output format may now be null rather than defaulting to the empty string and row 1, column 1, respectively.

... (truncated)

Sourced from ruff's changelog.

0.16.0

Released on 2026-07-23.

Check out the blog post for a migration guide and overview of the changes!

Breaking changes

• Ruff now enables a much larger set of rules by default (413, up from 59). See the blog post for more details and the new Default Rules page for a full listing of the enabled rules. Note that this is primarily an expansion, but 18 of the more opinionated pycodestyle (E) and pyflakes (F) rules have been removed from the default set: E401, E402, E701, E702, E703, E711, E712, E713, E714, E721, E731, E741, E742, E743, F403, F405, F406, and F722.

• Ruff can now format Python code blocks in Markdown files and will do this by default. See the documentation for more details.

• Ruff now supports ruff: ignore comments at the ends of lines, like noqa comments, or on the line preceding a diagnostic. For example, these both suppress an unused-import (F401) diagnostic:

  import math  # ruff: ignore[F401]
  ruff: ignore[F401]
  import os

• Fixes are now shown in check and format --check output:

  ❯ ruff format --check .
  unformatted: File would be reformatted
   --> try.md:1:1
    |
  1 | ```python
    - import   math
  2 + import math
  3 | ```
    |
  1 file would be reformatted

  This example also shows off the Markdown formatting.

• format --check now supports the same output formats as the linter, including the github and gitlab outputs for rendering annotations in CI:

... (truncated)

• a2635fd Bump 0.16.0 (#27136)
• 3433449 [ty] Reuse full call diagnostics for implicit setter calls (#27115)
• 2240070 Reflect ruff: ignore and --add-ignore stabilization in documentation (#27...
• 17ef711 Stabilize --add-ignore (#27125)
• ef912bb Add newly stabilized rules to defaults (#27055)
• b30f040 Stabilize new default rules (#27035)
• bcd70c5 Exclude Markdown files from format-dev runs (#27052)
• 87e51e2 Fix format --check spans for syntax errors (#27045)
• afe2723 [flake8-gettext] Stabilize qualified-name and built-in binding resolution (...
• a9702d8 [flake8-bandit] Stabilize string literal binding resolution (S310) (#26944)
• Additional commits viewable in compare view

Sourced from mypy's changelog.

Mypy Release Notes

Next Release

Packaging changes

• No longer provide mypyc-accelerated wheels for macOS x86_64 [mypyc-wheels #119](mypyc/mypy_mypyc-wheels#119)

Mypy 2.3

We've just uploaded mypy 2.3.0 to the Python Package Index (PyPI). Mypy is a static type checker for Python. This release includes new features, performance improvements and bug fixes. You can install it as follows:

python3 -m pip install -U mypy

You can read the full documentation for this release on Read the Docs.

The Upcoming Switch to the New Native Parser

We are planning to enable the new native parser (--native-parser) by default soon. We recommend that you test the native parser in your projects and report any issues in the mypy issue tracker.

Mypyc Free-threading Memory Safety

Free-threaded Python builds that don't have the GIL require additional synchronization primitives or lock-free algorithms to ensure memory safety when there are race conditions (for example, when a thread reads a list item while another thread writes the same list item concurrently). This release greatly improves memory safety of free threading.

List operations are now memory-safe on free threaded Python builds, even in the presence of race conditions. This has some performance cost. For list-heavy workloads, using librt.vecs.vec instead of list is often significantly faster, but note that vec is not (and likely won't be) fully memory safe, and the user is expected to avoid race conditions. The newly introduced librt.threading.Lock helps with this. Using variable-length tuples can also be more efficient than lists, since tuples are immutable and don't require expensive synchronization to ensure memory safety.

Instance attribute access is also (mostly) memory safe now on free-threaded builds in the presence of race conditions. We are planning to fix the remaining unsafe cases in a future release.

Full list of changes:

• Make attribute access memory safe on free-threaded builds (Jukka Lehtosalo, PR 21705)
• Fix unsafe borrowing of instance attributes with free-threading (Jukka Lehtosalo, PR 21688)
• Make list get/set item more memory safe on free-threaded builds (Jukka Lehtosalo, PR 21683)
• Don't borrow list items on free-threaded builds (Jukka Lehtosalo, PR 21679)
• Make multiple assignment from list memory-safe on free-threaded builds (Jukka Lehtosalo, PR 21684)

... (truncated)

• 8aabf84 Drop +dev from version
• 4d8ad2a Update changelog for 2.3 release (#21728)
• 2c21546 [mypyc] Update documentation of race conditions under free threading (#21726)
• a9f62a3 [mypyc] Make attribute access memory safe on free-threaded builds (#21705)
• 0faa413 Use PYODIDE environment variable for Emscripten cross-compilation detection...
• 3d75cdb [mypyc] Borrow final attributes more aggressively (#21702)
• 24c237d [mypyc] Improve documentation of Final (#21713)
• b5be217 [mypyc] Update free threading Python compatibility docs (#21711)
• cbcb51a Narrow for frozendict membership check (#21709)
• af2bc0f Sync typeshed (#21707)
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Sourced from pytest's releases.

9.1.1

pytest 9.1.1 (2026-06-19)

Bug fixes

• #14220: Fixed a logic bug in pytest.RaisesGroup which would might cause it to display incorrect "It matches FooError() which was paired with BarError" messages.
• #14591: Fixed a regression in pytest 9.1.0 which caused overriding a parametrized fixture with an indirect @​pytest.mark.parametrize to fail with "duplicate parametrization of '<fixture name>'".
• #14606: Fixed list-item typing errors from mypy in @pytest.mark.parametrize <pytest.mark.parametrize ref> argvalues parameter.
• #14608: Fixed a regression in pytest 9.1.0 where conftest.py files located in <invocation dir>/test* were no longer loaded as initial conftests when invoked without arguments. This could cause certain hooks (like pytest_addoption) in these files to not fire.

• cf470ec Prepare release version 9.1.1
• e0c8ce6 Merge pull request #14625 from pytest-dev/patchback/backports/9.1.x/a07c31a97...
• 1b82d16 Merge pull request #14624 from pytest-dev/patchback/backports/9.1.x/b375b79ec...
• 501c4bc Merge pull request #14596 from bluetech/doc-classmethod
• b61f588 Merge pull request #14622 from chrisburr/fix-14608-initial-conftest-test-subdir
• 9a567e0 [automated] Update plugin list (#14617) (#14618)
• ef8b299 Merge pull request #14620 from pytest-dev/patchback/backports/9.1.x/680f9f3ed...
• 66abd07 Merge pull request #14220 from bysiber/fix-stale-iexp-raisesgroup
• 79fbf93 Merge pull request #14612 from pytest-dev/patchback/backports/9.1.x/974ed48b6...
• 0d312eb Merge pull request #14611 from bluetech/parametrize-argvalues-typing
• Additional commits viewable in compare view

• See full diff in compare view

• 1a40eec Version 3.0.3.260530
• 0f063ec Make mypy reject float(Series) calls (#1753)
• a073669 GH1415 Enhance typing of Series[Categorical] (#1748)
• 9df3c52 TYP: GH1727 Narrow Series.to_numpy return types based on the dtype argument (...
• 2da5f78 GH1742 fix nightly CI (#1747)
• 84e7d1a BUG: allow kwargs in Styler apply_index and map_index (#1725)
• 82c9851 GH1654 Pandas 3.0 support (#1741)
• 4f6f533 MNT: Fix missing check/assert_type harness where missing (#1749)
• 3bbd508 chore(ci): declare contents: read on test (#1751)
• ee82af5 Modernize project settings in pyproject.toml (#1746)
• Additional commits viewable in compare view

Sourced from black's releases.

26.5.1

Stable style

• Fix unstable formatting of annotated assignments whose subscript annotation contains an inline comment (e.g. x: list[ # pyright: ignore[...]) (#5130)
• Preserve inline comments (including # type: ignore) immediately before a # fmt: skip line, avoiding AST equivalence failures (#5139)

Packaging

• Correct the version in the published executables (#5137)

Documentation

• Add Neovim integration guide covering conform.nvim, ALE, and simple command approaches (#5124)

Sourced from black's changelog.

Version 26.5.1

Stable style

• Fix unstable formatting of annotated assignments whose subscript annotation contains an inline comment (e.g. x: list[ # pyright: ignore[...]) (#5130)
• Preserve inline comments (including # type: ignore) immediately before a # fmt: skip line, avoiding AST equivalence failures (#5139)

Packaging

• Correct the version in the published executables (#5137)

Documentation

• Add Neovim integration guide covering conform.nvim, ALE, and simple command approaches (#5124)

Version 26.5.0

Highlights

• Add support for unpacking in comprehensions (PEP 798) and for lazy imports (PEP 810), both new syntactic features in Python 3.15 (#5048)
• Python 3.15 is now supported. Compiled wheels are not yet provided for Python 3.15, so performance may be slower than on existing Python versions. Wheels will be provided once Python 3.15 is later in its release cycle. (#5127)

Stable style

• Fix # fmt: skip being ignored in nested if expressions with parenthesized in clauses (#4903)
• Add syntactic support for Python 3.15 (#5048)
• Fix crash when an f-string follows a # fmt: off comment inside brackets (#5097)
• Preserve multiline compound statement headers when # fmt: skip is placed on the colon line (#5117)

Preview style

• Improve heuristics around whether blank lines should appear before, within and after groups of same-name decorated functions (such as @overload groups) in .pyi stub files (#5021)
• Fix blank lines being removed between a function and a decorated class in .pyi stub files (#5092)
• Prevent string merger from creating unsplittable long lines when a pragma comment (e.g. # type: ignore) follows the closing bracket (#5096)

Packaging

• Run CI on 3.15 (#5127)

... (truncated)

• 87928e6 Prepare release 26.5.1 (#5140)
• c970a49 Preserve comments before fmt: skip lines (#5139)
• 5809338 Preserve inline comments inside annotation subscripts (#5130)
• 61361b7 docs: add Neovim integration guide and fix http link (#5124)
• ebe6018 CI Hotfixes (#5136)
• 9cbd95f Fix publish binaries again on Windows (#5134)
• 3dc8e6c Add new changelog (#5132)
• 6d0fff0 Fix publish binaries workflow (#5133)
• d2490e2 Prepare release 26.5.0 (#5131)
• 2b13ea7 Preserve multiline headers with fmt skip (#5117)
• Additional commits viewable in compare view

Sourced from polars's releases.

Python Polars 1.43.1

🚀 Performance improvements

• Optimize not(bool_f) to not_bool_f (#28474)

✨ Enhancements

• Allow callback sinks on cloud (#28458)

🐞 Bug fixes

• Fix panic on self join of scan_delta / scan_iceberg (#28468)
• Fix UB on first/last_non_null with empty chunk (#28495)
• Do not CSE non-column height expr on streaming engine (#28480)
• Propagate adjusted sortedness through Gather (#28493)
• Deduplicate the expression equality checks (#28483)
• Address 3VL issue with SQL NOT IN interaction with NULL values and joins (#28484)
• Use total comparison in Expr literal values (#28482)
• Ensure SQL SUM and CORR aggregates return NULL for all-null inputs, add TOTAL (#28475)
• Share null_count_dtype helper between Delta and Iceberg, fixing SchemaError (#28479)
• Remove non-output columns from the equi-join and semi/anti-join operators (#28446)
• Fix dropped slice on multiple unions (#28477)
• Fix in-memory engine incorrect slice on maintain order join (#28478)
• Check join schema by position (#28455)
• Block predicate pushdown past overwritten window keys (#28429)

📖 Documentation

• Update and restructure README (#28490)
• Minor fixes to Spark migration guide (#27730)
• Relocate Polars Cloud & On-Prem User Guide (#28462)
• Add notes on k8s operator (#28445)

🛠️ Other improvements

• Make hive_part extraction a function and public (#28507)
• Deduplicate the expression equality checks (#28483)
• Bump ruff and mypy package versions (#28456)
• Fix flaky test (#28454)

Thank you to all our contributors for making this release possible! @​AnirudhRahul, @​EndPositive, @​Jesse-Bakker, @​alexander-beedie, @​carnarez, @​dancsi, @​mdroogh, @​mroeschke, @​nameexhaustion, @​nchammas, @​orlp, @​r-brink and @​ritchie46

• 8d438be Python Polars 1.43.1 (#28523)
• a3e282a refactor: Make hive_part extraction a function and public (#28507)
• f6d2bec docs: Update and restructure README (#28490)
• b78761c feat(rust): Support reading IEEE 754 total order Parquet column order (#27896)
• b1268f1 fix: Fix panic on self join of scan_delta / scan_iceberg (#28468)
• 0d4a49a fix(rust): Decrement ParkGroup worker count when worker exits (#28492)
• a3982dd fix(rust): Add missing Send bounds in Connector (#28497)
• 49ceb73 fix: Fix UB on first/last_non_null with empty chunk (#28495)
• 1f63626 fix: Do not CSE non-column height expr on streaming engine (#28480)
• f75402e fix: Propagate adjusted sortedness through Gather (#28493)
• Additional commits viewable in compare view

Sourced from setuptools's changelog.

v83.0.0

Features

• Require Python 3.10 or later.

Bugfixes

• MANIFEST.in matching (via FileList) is now insensitive to Unicode normalization form. A pattern authored in one form (e.g. NFC, as typically saved by editors) now matches a file whose name is stored on disk in another (e.g. NFD, as produced by macOS APFS/HFS+). Previously an exclude, global-exclude, recursive-exclude, or prune rule could silently fail to drop a non-ASCII-named file from the source distribution, publishing it despite the exclusion -- see GHSA-h35f-9h28-mq5c.

Deprecations and Removals

• pypa/distutils#334

v82.0.1

Bugfixes

• Fix the loading of launcher manifest.xml file. (#5047)
• Replaced deprecated json.__version__ with fixture in tests. (#5186)

Improved Documentation

• Add advice about how to improve predictability when installing sdists. (#5168)

Misc

• #4941, #5157, #5169, #5175

v82.0.0

... (truncated)

• 6519f72 Bump version: 82.0.1 → 83.0.0
• d1151b1 Merge pull request #5250 from pypa/feature/distutils-d7633fbed
• a2df31e Capture removal of dry_run parameter in changelog.
• 00144dc Moved newsfragment to the release where it occurred.
• a4a5a2b Add news fragment.
• 77470c2 Merge https://github.com/pypa/distutils into feature/distutils-d7633fbed
• 3c43897 Merge pull request #5247 from pypa/copilot/fix-pypy-version-issue
• bb6ea66 Bump PyPy from 3.10 to 3.11 in CI workflow
• a2bc3ac Fix broken intersphinx reference to build's installation docs
• 2d6a739 Use stacked parametrize decorators instead of itertools.product
• Additional commits viewable in compare view

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