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@dependabot dependabot bot commented on behalf of github Sep 15, 2025

Bumps mypy from 1.17.1 to 1.18.1.

Changelog

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)

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📚 Documentation preview 📚: https://torchmetrics--3264.org.readthedocs.build/en/3264/

@dependabot dependabot bot added the test / CI testing or CI label Sep 15, 2025
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codecov bot commented Sep 17, 2025

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 31%. Comparing base (cb4bd13) to head (de760ac).
⚠️ Report is 1 commits behind head on master.

❌ Your project check has failed because the head coverage (31%) is below the target coverage (95%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files
@@           Coverage Diff            @@
##           master   #3264     +/-   ##
========================================
- Coverage      37%     31%     -6%     
========================================
  Files         349     349             
  Lines       19900   19901      +1     
========================================
- Hits         7326    6196   -1130     
- Misses      12574   13705   +1131     
🚀 New features to boost your workflow:
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dependabot bot and others added 6 commits September 21, 2025 03:54
Bumps [mypy](https://github.com/python/mypy) from 1.17.1 to 1.18.1.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.17.1...v1.18.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.18.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
@rittik9 rittik9 force-pushed the dependabot-pip-requirements-mypy-1.18.1 branch from 294ba8b to 9ea9bb2 Compare September 20, 2025 22:24
@rittik9 rittik9 enabled auto-merge (squash) September 20, 2025 22:34
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dependabot bot commented on behalf of github Sep 22, 2025

A newer version of mypy exists, but since this PR has been edited by someone other than Dependabot I haven't updated it. You'll get a PR for the updated version as normal once this PR is merged.

@rittik9 rittik9 changed the title build(deps): bump mypy from 1.17.1 to 1.18.1 in /requirements build(deps): bump mypy from 1.17.1 to 1.18.2 in /requirements Sep 30, 2025
@mergify mergify bot added the ready label Sep 30, 2025
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