Bump mypy from 2.1.0 to 2.3.1

[dependabot]

Bumps mypy from 2.1.0 to 2.3.1.

Changelog

Sourced from mypy's changelog.

Mypy 2.3.1

• Fix mypyc crash on double yielding Iterators (Daniël van Noord, PR 21826)
• Fix mypyc default_factory for inherited dataclass (Daniël van Noord, PR 21785)
• Clear mypyc coroutine env on coroutine completion (Piotr Sawicki, PR 21734)
• Fix crash when unpacking return value from overload (Shantanu, PR 21830)

Acknowledgements

Thanks to all mypy contributors who contributed to this release:

• Agriya Khetarpal
• Ethan Sarp
• Ivan Levkivskyi
• Jingchen Ye
• Jukka Lehtosalo
• Piotr Sawicki
• Shantanu
• Tom Bannink
• Viktor Szépe
• ygale

I'd also like to thank my employer, Dropbox, for supporting mypy development.

Mypy 2.2

We've just uploaded mypy 2.2.0 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.

Support for Closed TypedDicts (PEP 728)

Mypy now supports closed TypedDicts as specified in PEP 728. A closed TypedDict cannot have extra keys beyond those explicitly defined. This allows the type checker to determine that certain operations are safe when they otherwise wouldn't be due to the potential presence of unknown keys.

You can use the closed keyword argument with TypedDict:

HasName = TypedDict("HasName", {"name": str})
HasOnlyName = TypedDict("HasOnlyName", {"name": str}, closed=True)
Movie = TypedDict("Movie", {"name": str, "year": int})
movie: Movie = {"name": "Nimona", "year": 2023}
has_name: HasName = movie  # OK: HasName is open (default)
has_only_name: HasOnlyName = movie  # Error: HasOnlyName is closed and Movie has extra "year" key
</tr></table>

... (truncated)

Commits

• d642c44 Bump version to 2.3.1
• a392429 [mypyc] Fix crash on double yielding Iterators (#21826)
• 4843e77 [mypyc] Fix default_factory for inherited dataclass (#21785)
• 14f5df9 [mypyc] Clear coroutine env on coroutine completion (#21734)
• 6dfa06d Fix crash when unpacking return value from overload (#21830)
• a385746 Bump version to 2.3.1+dev
• 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)
• Additional commits viewable in compare view

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Note

Low Risk
Dev-only type checker upgrade; runtime behavior is unchanged, though CI or pre-commit may report new or stricter mypy diagnostics after 2.2/2.3.

Overview
Raises the optional dev dependency on mypy in pyproject.toml from >=1.11.1 to >=2.3.1 and refreshes poetry.lock so installs resolve mypy 2.3.1.

The lockfile also picks up mypy’s updated pins: ast-serialize (0.5.0 → 0.8.0) and librt (0.11.0 → 0.15.0). There are no application code changes—only tooling used by pre-commit/CI type-checking (./activated.py mypy).

^{Reviewed by Cursor Bugbot for commit d86795e. Bugbot is set up for automated code reviews on this repo. Configure here.}

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	pypi/​mypy@​2.1.0 ⏵ 2.3.1	+1

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[socket-security]

Caution

Review the following alerts detected in dependencies.

According to your organization's Security Policy, you must resolve all "Block" alerts before proceeding. Learn more about Socket for GitHub.

Action	Severity	Alert  (click "▶" to expand/collapse)
Block		Install-time scripts: pypi ast-serialize Install script: Package overview Source: undefined From: poetry.lock → pypi/mypy@2.3.1 → pypi/ast-serialize@0.8.0 ℹ Read more on: This package | This alert | What is an install script? Next steps: Take a moment to review the security alert above. Review the linked package source code to understand the potential risk. Ensure the package is not malicious before proceeding. If you're unsure how to proceed, reach out to your security team or ask the Socket team for help at support@socket.dev. Suggestion: Packages should not be running non-essential scripts during install and there are often solutions to problems people solve with install scripts that can be run at publish time instead. Mark the package as acceptable risk. To ignore this alert only in this pull request, reply with the comment @SocketSecurity ignore pypi/ast-serialize@0.8.0. You can also ignore all packages with @SocketSecurity ignore-all. To ignore an alert for all future pull requests, use Socket's Dashboard to change the triage state of this alert.

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