Sourced from mypy's changelog.

Mypy Release Notes

Next Release

Mypy 1.18

We’ve just uploaded mypy 1.18 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.

Mypy Performance Improvements

Mypy 1.18 includes numerous performance improvements, resulting in about 40% speedup compared to 1.17 when type checking mypy itself. In extreme cases, the improvement can be 10x or higher. The list below is an overview of the various mypy optimizations. Many mypyc improvements (discussed in a separate section below) also improve performance.

Type caching optimizations have a small risk of causing regressions. When reporting issues with unexpected inferred types, please also check if --disable-expression-cache will work around the issue, as it turns off some of these optimizations.

• Improve self check performance by 1.8% (Jukka Lehtosalo, PR 19768, 19769, 19770)
• Optimize fixed-format deserialization (Ivan Levkivskyi, PR 19765)
• Use macros to optimize fixed-format deserialization (Ivan Levkivskyi, PR 19757)
• Two additional micro‑optimizations (Ivan Levkivskyi, PR 19627)
• Another set of micro‑optimizations (Ivan Levkivskyi, PR 19633)
• Cache common types (Ivan Levkivskyi, PR 19621)
• Skip more method bodies in third‑party libraries for speed (Ivan Levkivskyi, PR 19586)
• Simplify the representation of callable types (Ivan Levkivskyi, PR 19580)
• Add cache for types of some expressions (Ivan Levkivskyi, PR 19505)
• Use cache for dictionary expressions (Ivan Levkivskyi, PR 19536)
• Use cache for binary operations (Ivan Levkivskyi, PR 19523)
• Cache types of type objects (Ivan Levkivskyi, PR 19514)
• Avoid duplicate work when checking boolean operations (Ivan Levkivskyi, PR 19515)
• Optimize generic inference passes (Ivan Levkivskyi, PR 19501)
• Speed up the default plugin (Jukka Lehtosalo, PRs 19385 and 19462)
• Remove nested imports from the default plugin (Ivan Levkivskyi, PR 19388)
• Micro‑optimize type expansion (Jukka Lehtosalo, PR 19461)
• Micro‑optimize type indirection (Jukka Lehtosalo, PR 19460)
• Micro‑optimize the plugin framework (Jukka Lehtosalo, PR 19464)
• Avoid temporary set creation in subtype checking (Jukka Lehtosalo, PR 19463)
• Subtype checking micro‑optimization (Jukka Lehtosalo, PR 19384)
• Return early where possible in subtype check (Stanislav Terliakov, PR 19400)
• Deduplicate some types before joining (Stanislav Terliakov, PR 19409)
• Speed up type checking by caching argument inference context (Jukka Lehtosalo, PR 19323)

... (truncated)

• 03fbaa9 bump version to 1.18.1 due to wheels failure
• b44a1fb removed +dev from version
• 7197a99 Removed Unreleased in the Changelog for Release 1.18 (#19827)
• ee61cec Updates to 1.18 changelog (#19826)
• 24eed0b Initial changelog for release 1.18 (#19818)
• 0ca1f2a Expose --fixed-format-cache if compiled (#19815)
• 2ce1bb2 [mypyc] Fix subclass processing in detect_undefined_bitmap (#19787)
• a6b55f0 feat: new mypyc primitives for weakref.proxy (#19217)
• 5a323dd Make --allow-redefinition-new argument public (#19796)
• 8638eb4 [stubtest] temporary --ignore-disjoint-bases flag (#19740)
• Additional commits viewable in compare view

Sourced from pytest-asyncio's releases.

pytest-asyncio 1.2.0

1.2.0 - 2025-09-12

Added

• --asyncio-debug CLI option and asyncio_debug configuration option to enable asyncio debug mode for the default event loop. (#980)
• A pytest.UsageError for invalid configuration values of asyncio_default_fixture_loop_scope and asyncio_default_test_loop_scope. (#1189)
• Compatibility with the Pyright type checker (#731)

Fixed

• RuntimeError: There is no current event loop in thread 'MainThread' when any test unsets the event loop (such as when using asyncio.run and asyncio.Runner). (#1177)
• Deprecation warning when decorating an asynchronous fixture with @pytest.fixture in [strict]{.title-ref} mode. The warning message now refers to the correct package. (#1198)

Notes for Downstream Packagers

• Bump the minimum required version of tox to v4.28. This change is only relevant if you use the tox.ini file provided by pytest-asyncio to run tests.
• Extend dependency on typing-extensions>=4.12 from Python<3.10 to Python<3.13.

pytest-asyncio 1.1.1

v1.1.1 - 2025-09-12

Notes for Downstream Packagers

- Addresses a build problem with setuptoos-scm >= 9 caused by invalid setuptools-scm configuration in pytest-asyncio. (#1192)

• 0d3988f ci: Create GitHub release before publishing to PyPI.
• 07c5a0b docs: Include orphaned news fragment in changelog.
• be24582 chore: Prepare release of v1.2.0.
• 7aeb296 docs: Streamline news fragments
• 7b8311c ci: Fixes a bug that prevented SSH signature from being stripped from release...
• 9d4c2bd docs: Add changelog entry for Pyright compatibility.
• 94f6106 test: Added tests which assert that the event loop is reinstated if unset by ...
• df61991 [pre-commit.ci] pre-commit autoupdate
• f1f7941 Build(deps): Bump pytest from 8.4.1 to 8.4.2
• c77d3d3 Build(deps): Bump twine from 6.1.0 to 6.2.0
• Additional commits viewable in compare view

• b01d02d Merge branch 'release-1.40.30'
• 065a46d Bumping version to 1.40.30
• f78c83b Add changelog entries from botocore
• 97fd5d9 Merge pull request #4613 from adev-code/documentation-only
• 2a0d0ad Merge branch 'release-1.40.29'
• 12750f6 Merge branch 'release-1.40.29' into develop
• 62ea501 Bumping version to 1.40.29
• 32f7dea Add changelog entries from botocore
• c1d11ea Fix ExtraArgs documentation in S3 copy methods to reference ALLOWED_COPY_ARGS
• 14fc68d Fix ExtraArgs documentation in S3 copy methods to reference ALLOWED_COPY_ARGS
• Additional commits viewable in compare view

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