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Bump mypy from 1.20.0 to 1.20.1#87

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dependabot/uv/mypy-1.20.1
Apr 14, 2026
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Bump mypy from 1.20.0 to 1.20.1#87
dchud merged 1 commit intomainfrom
dependabot/uv/mypy-1.20.1

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@dependabot dependabot bot commented on behalf of github Apr 14, 2026

Bumps mypy from 1.20.0 to 1.20.1.

Changelog

Sourced from mypy's changelog.

Mypy 1.20.1

  • Always disable sync in SQLite cache (Ivan Levkivskyi, PR 21184)
  • Temporarily skip few base64 tests (Ivan Levkivskyi, PR 21193)
  • Revert dict.__or__ typeshed change (Ivan Levkivskyi, PR 21186)
  • Fix narrowing for match case with variadic tuples (Shantanu, PR 21192)
  • Avoid narrowing type[T] in type calls (Shantanu, PR 21174)
  • Fix regression for catching empty tuple in except (Shantanu, PR 21153)
  • Fix reachability for frozenset and dict view narrowing (Shantanu, PR 21151)
  • Fix narrowing with chained comparison (Shantanu, PR 21150)
  • Avoid narrowing to unreachable at module level (Shantanu, PR 21144)
  • Allow dangerous identity comparisons to Any typed variables (Shantanu, PR 21142)
  • --warn-unused-config should not be a strict flag (Ivan Levkivskyi, PR 21139)

Acknowledgements

Thanks to all mypy contributors who contributed to this release:

  • A5rocks
  • Aaron Wieczorek
  • Adam Turner
  • Ali Hamdan
  • asce
  • BobTheBuidler
  • Brent Westbrook
  • Brian Schubert
  • bzoracler
  • Chris Burroughs
  • Christoph Tyralla
  • Colin Watson
  • Donghoon Nam
  • E. M. Bray
  • Emma Smith
  • Ethan Sarp
  • George Ogden
  • getzze
  • grayjk
  • Gregor Riepl
  • Ivan Levkivskyi
  • James Hilliard
  • James Le Cuirot
  • Jeremy Nimmer
  • Joren Hammudoglu
  • Kai (Kazuya Ito)
  • kaushal trivedi
  • Kevin Kannammalil
  • Lukas Geiger
  • Łukasz Langa
  • Marc Mueller
  • Michael R. Crusoe
  • michaelm-openai

... (truncated)

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Bumps [mypy](https://github.com/python/mypy) from 1.20.0 to 1.20.1.
- [Changelog](https://github.com/python/mypy/blob/master/CHANGELOG.md)
- [Commits](python/mypy@v1.20.0...v1.20.1)

---
updated-dependencies:
- dependency-name: mypy
  dependency-version: 1.20.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
@dependabot dependabot bot added dependencies Pull requests that update a dependency file python:uv Pull requests that update python:uv code labels Apr 14, 2026
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codspeed-hq bot commented Apr 14, 2026

Merging this PR will degrade performance by 18.39%

⚠️ Unknown Walltime execution environment detected

Using the Walltime instrument on standard Hosted Runners will lead to inconsistent data.

For the most accurate results, we recommend using CodSpeed Macro Runners: bare-metal machines fine-tuned for performance measurement consistency.

⚡ 7 improved benchmarks
❌ 4 (👁 4) regressed benchmarks
✅ 49 untouched benchmarks
⏩ 16 skipped benchmarks1

Performance Changes

Mode Benchmark BASE HEAD Efficiency
👁 WallTime test_pipeline_parallel_4x_10k_threaded 92.3 ms 103.4 ms -10.7%
👁 WallTime test_pipeline_parallel_2x_10k_threaded 41.5 ms 50.8 ms -18.23%
WallTime test_threaded_reading_4x_10k 991.8 ms 865.5 ms +14.59%
WallTime test_parallel_read_4x_10k 983.8 ms 875.9 ms +12.32%
👁 WallTime test_pipeline_sequential_1x_10k 18.7 ms 21 ms -10.63%
WallTime test_file_parallel_4x_10k 1,037.4 ms 900.7 ms +15.17%
WallTime test_threaded_with_title_extraction_4x_10k 1,008 ms 891.8 ms +13.04%
WallTime test_parallel_read_with_extract_4x_1k 100.7 ms 91.5 ms +10.07%
WallTime test_file_parallel_4x_10k_with_extraction 1,085.2 ms 917.5 ms +18.28%
WallTime test_parallel_read_with_extract_4x_10k 1,072.6 ms 932 ms +15.08%
👁 WallTime test_pipeline_sequential_4x_10k 78.2 ms 95.8 ms -18.39%

Comparing dependabot/uv/mypy-1.20.1 (46af7b7) with main (ae3a684)

Open in CodSpeed

Footnotes

  1. 16 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports.

@dchud dchud merged commit 4845825 into main Apr 14, 2026
47 checks passed
@dchud dchud deleted the dependabot/uv/mypy-1.20.1 branch April 14, 2026 23:50
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