Bump mypy from 2.1.0 to 2.3.0

[dependabot]

Bumps mypy from 2.1.0 to 2.3.0.

Changelog

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)

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

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 8c2f5dca-2d07-45ad-ac53-c3759cdc129c

📥 Commits

Reviewing files that changed from the base of the PR and between c83eed6 and 8735902.

📒 Files selected for processing (2)

• .pre-commit-config.yaml
• requirements-dev.txt

🚧 Files skipped from review as they are similar to previous changes (1)

• requirements-dev.txt

📜 Recent review details

⏰ Context from checks skipped due to timeout. (2)

• GitHub Check: Analyze (actions)
• GitHub Check: Analyze (python)

🔇 Additional comments (1)

.pre-commit-config.yaml (1)

18-18: LGTM!

---

📝 Walkthrough

Summary by CodeRabbit

• Chores
  • Updated the development type-checking tool to version 2.3.0.

Walkthrough

The mypy version is updated from 2.1.0 to 2.3.0 in the development dependency file and the pre-commit configuration.

Changes

Development dependency update

Layer / File(s)	Summary
Update mypy development tooling requirements-dev.txt, .pre-commit-config.yaml	Updates the mypy dependency pin and pre-commit revision from 2.1.0 to 2.3.0.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: finallyjay

Poem

A rabbit updates mypy today,
The old version hops away.
Requirements and hooks align,
Both now use version two-three-nine?
No—two-three, and checks are fine.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the dependency update but omits the required Summary, Changes, Test plan, and Related issues sections.	Add the required template sections and include the changes, validation steps, and related issue information.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the mypy dependency update from version 2.1.0 to 2.3.0.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch dependabot/pip/mypy-2.3.0

---

_{Comment @coderabbitai help to get the list of available commands.}

[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@requirements-dev.txt`:
- Line 6: Update the mypy revision in the pre-commit configuration to match the
requirements-dev.txt pin at version 2.3.0, ensuring both development dependency
management and pre-commit checks use the same version.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 0a444f43-fbee-452f-b753-c9da8ff5f5a4

📥 Commits

Reviewing files that changed from the base of the PR and between f0f6a92 and c83eed6.

📒 Files selected for processing (1)

• requirements-dev.txt