Bump the python-packages group with 4 updates

[dependabot]

Bumps the python-packages group with 4 updates: ruff, pytest, mypy and types-requests.

Updates ruff from 0.15.17 to 0.15.21

Release notes

Sourced from ruff's releases.

0.15.21

Release Notes

Released on 2026-07-09.

Preview features

• Add --add-ignore for adding ruff:ignore comments (#26346)
• [flake8-comprehensions] Drop C409 tuple comprehension preview behavior (#25707)
• Avoid whitespace normalization when formatting comments (#26455)
• [pyupgrade] Lint and fix use of deprecated abc decorators (UP051) (#26417)

Bug fixes

• Refine non-empty f-string detection (#26526)
• Detect syntax errors in individual notebook cells (#26419)
• [flake8-implicit-str-concat] Fix ISC003 autofix incorrectly stripping + from comments (#26554)

Rule changes

• [flake8-executable] Mark EXE004 fix as unsafe (#26033)
• [flake8-pyi] Mark PYI061 fixes as unsafe in Python files (#26533)
• [pydocstyle] Skip overload-with-docstring in stub files (D418) (#26318)

Performance

• Avoid per-token source index visitor calls (#26506)
• Cache parenthesized expression boundaries in the formatter (#26344)
• Improve performance of rendering edits in preview mode (#26565)
• Inline fits_element in formatter (#26429)
• Inline formatter printing hot paths (#26504)
• Lazily create builtin bindings (#26510)
• Skip empty trivia scans in the source indexer (#26507)
• Use ICF for macOS release builds (#25780)

Formatter

• Add --extend-exclude to ruff format (#26372)

Documentation

• Add "How does Ruff's import sorting compare to isort?" link to README (#26530)
• Fix Mozilla Firefox repository link in README (#26537)
• [flake8-bandit] Fix misleading docstring for mako-templates (S702) (#26432)
• [ruff] Fix non-triggering example for if-key-in-dict-del (RUF051) (#26433)

Contributors

• @​EkriirkE
• @​tingerrr

... (truncated)

Changelog

Sourced from ruff's changelog.

0.15.21

Released on 2026-07-09.

Preview features

• Add --add-ignore for adding ruff:ignore comments (#26346)
• [flake8-comprehensions] Drop C409 tuple comprehension preview behavior (#25707)
• Avoid whitespace normalization when formatting comments (#26455)
• [pyupgrade] Lint and fix use of deprecated abc decorators (UP051) (#26417)

Bug fixes

• Refine non-empty f-string detection (#26526)
• Detect syntax errors in individual notebook cells (#26419)
• [flake8-implicit-str-concat] Fix ISC003 autofix incorrectly stripping + from comments (#26554)

Rule changes

• [flake8-executable] Mark EXE004 fix as unsafe (#26033)
• [flake8-pyi] Mark PYI061 fixes as unsafe in Python files (#26533)
• [pydocstyle] Skip overload-with-docstring in stub files (D418) (#26318)

Performance

• Avoid per-token source index visitor calls (#26506)
• Cache parenthesized expression boundaries in the formatter (#26344)
• Improve performance of rendering edits in preview mode (#26565)
• Inline fits_element in formatter (#26429)
• Inline formatter printing hot paths (#26504)
• Lazily create builtin bindings (#26510)
• Skip empty trivia scans in the source indexer (#26507)
• Use ICF for macOS release builds (#25780)

Formatter

• Add --extend-exclude to ruff format (#26372)

Documentation

• Add "How does Ruff's import sorting compare to isort?" link to README (#26530)
• Fix Mozilla Firefox repository link in README (#26537)
• [flake8-bandit] Fix misleading docstring for mako-templates (S702) (#26432)
• [ruff] Fix non-triggering example for if-key-in-dict-del (RUF051) (#26433)

Contributors

• @​EkriirkE
• @​tingerrr
• @​s-rigaud

... (truncated)

Commits

• 3e1f636 Bump 0.15.21 (#26676)
• 4059807 [ty] Infer metaclass-declared attributes on class instances (#26512)
• 013e5d0 [ty] Use a dedicated project name type (#26665)
• 7ad39ad [ty] Avoid allocating decorated parameter names (#26666)
• c36f662 Improve performance of rendering edits in preview mode (#26565)
• ad26408 [ty] Gate membership narrowing on __contains__ semantics (#25964)
• 4594ca7 [ty] Add variant discriminators for CodeGeneratorKind (#26659)
• 1af03da [ty] Pydantic: Fix float conversion in unions (#26655)
• a004a36 [ty] Handle callable classes in solver (#26090)
• d8ef3b0 [ty] Parse all supported Google docstring sections. (#26653)
• Additional commits viewable in compare view

Updates pytest from 9.1.0 to 9.1.1

Release notes

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.

Commits

• 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

Updates mypy from 2.1.0 to 2.3.0

Changelog

Sourced from mypy's changelog.

Mypy Release Notes

Next Release

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)
• Make for loop over list memory-safe on free-threaded builds (Jukka Lehtosalo, PR 21686)
• Fix memory safety of list.count on free-threaded builds (Jukka Lehtosalo, PR 21680)
• Make vec creation from list memory safe on free-threaded builds (Jukka Lehtosalo, PR 21681)

... (truncated)

Commits

• 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)
• Additional commits viewable in compare view

Updates types-requests from 2.33.0.20260518 to 2.33.0.20260712

Commits

• See full diff in compare view

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