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Build(deps-dev): Bump mypy from 1.20.0 to 2.1.0 in /python - #5989

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Build(deps-dev): Bump mypy from 1.20.0 to 2.1.0 in /python#5989
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@dependabot dependabot Bot commented on behalf of github May 20, 2026

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Bumps mypy from 1.20.0 to 2.1.0.

Changelog

Sourced from mypy's changelog.

Mypy Release Notes

Next Release

Mypy 2.1

We’ve just uploaded mypy 2.1.0 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.

librt.vecs: Fast Growable Array Type for Mypyc

The new librt.vecs module provides an efficient growable array type vec that is optimized for mypyc use. It provides fast, packed arrays with integer and floating point value types, which can be several times faster than list, and tens of times faster than array.array in code compiled using mypyc. It also supports nested vec objects and non-value-type items, such as vec[vec[str]].

Refer to the documentation for the details.

Contributed by Jukka Lehtosalo.

librt.random: Fast Pseudo-Random Number Generation

The new librt.random module provides fast pseudo-random number generation that is optimized for code compiled using mypyc. It can be 3x to 10x faster than the stdlib random module in compiled code.

Refer to the documentation for the details.

Contributed by Jukka Lehtosalo (PR 21433).

Mypyc Improvements

  • Make compilation order with multiple files consistent (Piotr Sawicki, PR 21419)
  • Fix crash on accessing StopAsyncIteration (Piotr Sawicki, PR 21406)
  • Fix incremental compilation with separate flag (Vaggelis Danias, PR 21299)

Fixes to Crashes

  • Fix crash on partial type with --allow-redefinition and global declaration (Jukka Lehtosalo, PR 21428)
  • Fix broken awaitable generator patching (Ivan Levkivskyi, PR 21435)

Changes to Messages

... (truncated)

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@dependabot dependabot Bot added dependencies python Usage: [Issues, PRs], Target: Python labels May 20, 2026
Copilot AI review requested due to automatic review settings May 20, 2026 22:33
@dependabot dependabot Bot added python Usage: [Issues, PRs], Target: Python dependencies labels May 20, 2026

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@github-actions github-actions Bot changed the title build(deps-dev): bump mypy from 1.20.0 to 2.1.0 in /python Python: build(deps-dev): bump mypy from 1.20.0 to 2.1.0 in /python May 20, 2026
@dependabot dependabot Bot changed the title Python: build(deps-dev): bump mypy from 1.20.0 to 2.1.0 in /python Bump mypy from 1.20.0 to 2.1.0 in /python May 22, 2026
@dependabot
dependabot Bot force-pushed the dependabot/pip/python/mypy-2.1.0 branch 2 times, most recently from 157d0ac to ff0c1b8 Compare May 22, 2026 02:14
@dependabot dependabot Bot changed the title Bump mypy from 1.20.0 to 2.1.0 in /python Build(deps-dev): Bump mypy from 1.20.0 to 2.1.0 in /python May 28, 2026
@dependabot
dependabot Bot force-pushed the dependabot/pip/python/mypy-2.1.0 branch from ff0c1b8 to 78a63fd Compare May 28, 2026 10:48
Bumps [mypy](https://github.com/python/mypy) from 1.20.0 to 2.1.0.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.20.0...v2.1.0)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 2.1.0
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
@eavanvalkenburg

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Closing in favor of #6238. The mypy 1.20.0 → 2.1.0 major bump introduces new type-checking errors (e.g. redundant-cast in azure-contentunderstanding) and pairs with new pyright diagnostics; it needs a dedicated PR to address the fallout. #6238 keeps mypy at 1.20.0 and explains this.

@dependabot @github

dependabot Bot commented on behalf of github Jun 1, 2026

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OK, I won't notify you again about this release, but will get in touch when a new version is available. If you'd rather skip all updates until the next major or minor version, let me know by commenting @dependabot ignore this major version or @dependabot ignore this minor version. You can also ignore all major, minor, or patch releases for a dependency by adding an ignore condition with the desired update_types to your config file.

If you change your mind, just re-open this PR and I'll resolve any conflicts on it.

@dependabot
dependabot Bot deleted the dependabot/pip/python/mypy-2.1.0 branch June 1, 2026 13:33
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