Sourced fromblack's releases.

25.9.0

Highlights

• Remove support for pre-python 3.7await/async as soft keywords/variable names(#4676)

Stable style

• Fix crash while formatting a longdel statement containing tuples (#4628)
• Fix crash while formatting expressions using the walrus operator in complexwithstatements (#4630)
• Handle# fmt: skip followed by a comment at the end of file (#4635)
• Fix crash when a tuple appears in theas clause of awith statement (#4634)
• Fix crash when tuple is used as a context manager inside awith statement (#4646)
• Fix crash when formatting a\ followed by a\r followed by a comment (#4663)
• Fix crash on a\\r\n (#4673)
• Fix crash onawait ... (where... is a literalEllipsis) (#4676)
• Fix crash on parenthesized expression inside a type parameter bound (#4684)
• Fix crash when using line ranges excluding indented single line decorated items(#4670)

Preview style

• Fix a bug where one-liner functions/conditionals marked with# fmt: skip would stillbe formatted (#4552)
• Improvemultiline_string_handling with ternaries and dictionaries (#4657)
• Fix a bug wherestring_processing would not split f-strings directly afterexpressions (#4680)
• Wrap thein clause of comprehensions across lines if necessary (#4699)
• Remove parentheses around multiple exception types inexcept andexcept* withoutas. (#4720)
• Add\r style newlines to the potential newlines to normalize file newlines both fromand to (#4710)

Parser

• Rewrite tokenizer to improve performance and compliance (#4536)
• Fix bug where certain unusual expressions (e.g., lambdas) were not accepted in typeparameter bounds and defaults. (#4602)

Performance

• Avoid using an extra process when running with only one worker (#4734)

Integrations

• Fix the version check in the vim file to reject Python 3.8 (#4567)
• Enhance GitHub Actionpsf/black to read Black version from an additional section inpyproject.toml:[project.dependency-groups] (#4606)
• Build gallery docker image with python3-slim and reduce image size (#4686)

... (truncated)

Sourced fromblack's changelog.

25.9.0

Highlights

• Remove support for pre-python 3.7await/async as soft keywords/variable names(#4676)

Stable style

• Fix crash while formatting a longdel statement containing tuples (#4628)
• Fix crash while formatting expressions using the walrus operator in complexwithstatements (#4630)
• Handle# fmt: skip followed by a comment at the end of file (#4635)
• Fix crash when a tuple appears in theas clause of awith statement (#4634)
• Fix crash when tuple is used as a context manager inside awith statement (#4646)
• Fix crash when formatting a\ followed by a\r followed by a comment (#4663)
• Fix crash on a\\r\n (#4673)
• Fix crash onawait ... (where... is a literalEllipsis) (#4676)
• Fix crash on parenthesized expression inside a type parameter bound (#4684)
• Fix crash when using line ranges excluding indented single line decorated items(#4670)

Preview style

• Fix a bug where one-liner functions/conditionals marked with# fmt: skip would stillbe formatted (#4552)
• Improvemultiline_string_handling with ternaries and dictionaries (#4657)
• Fix a bug wherestring_processing would not split f-strings directly afterexpressions (#4680)
• Wrap thein clause of comprehensions across lines if necessary (#4699)
• Remove parentheses around multiple exception types inexcept andexcept* withoutas. (#4720)
• Add\r style newlines to the potential newlines to normalize file newlines both fromand to (#4710)

Parser

• Rewrite tokenizer to improve performance and compliance (#4536)
• Fix bug where certain unusual expressions (e.g., lambdas) were not accepted in typeparameter bounds and defaults. (#4602)

Performance

• Avoid using an extra process when running with only one worker (#4734)

Integrations

• Fix the version check in the vim file to reject Python 3.8 (#4567)
• Enhance GitHub Actionpsf/black to read Black version from an additional section inpyproject.toml:[project.dependency-groups] (#4606)

... (truncated)

• af0ba72 Prepare docs for release 25.9.0 (#4751)
• ffc01a0 Fix schema generation error caused by new click version (#4750)
• 626b32f Add normalizing for\r style newlines (#4710)
• 57a4612 Fix mypy type issue (#4745)
• 4f6ad7c Wrap thein clause of comprehensions across lines if necessary (#4699)
• 24f5169 ci: Run diff-shades on unstable instead of preview (#4741)
• 4d55e60 Bump actions/setup-python from 5 to 6 (#4744)
• 0cf39ef Improve the performance of get_string_prefix (#4742)
• 1f779de Fix line ranges decorator edge case (#4670)
• 203fd6b Optimize Line string method (#4739)
• Additional commits viewable incompare view

Sourced frommypy's changelog.

Mypy 1.18.1

We’ve just uploaded mypy 1.18.1 to the Python Package Index (PyPI).Mypy is a static type checker for Python. This release includes new features, performanceimprovements and bug fixes. You can install it as follows:

python3 -m pip install -U mypy

You can read the full documentation for this release onRead the Docs.

Mypy Performance Improvements

Mypy 1.18.1 includes numerous performance improvements, resulting in about 40% speedupcompared to 1.17 when type checking mypy itself. In extreme cases, the improvementcan 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. Whenreporting issues with unexpected inferred types, please also check if--disable-expression-cache will work around the issue, as it turns off some ofthese optimizations.

• Improve self check performance by 1.8% (Jukka Lehtosalo, PR19768,19769,19770)
• Optimize fixed-format deserialization (Ivan Levkivskyi, PR19765)
• Use macros to optimize fixed-format deserialization (Ivan Levkivskyi, PR19757)
• Two additional micro‑optimizations (Ivan Levkivskyi, PR19627)
• Another set of micro‑optimizations (Ivan Levkivskyi, PR19633)
• Cache common types (Ivan Levkivskyi, PR19621)
• Skip more method bodies in third‑party libraries for speed (Ivan Levkivskyi, PR19586)
• Simplify the representation of callable types (Ivan Levkivskyi, PR19580)
• Add cache for types of some expressions (Ivan Levkivskyi, PR19505)
• Use cache for dictionary expressions (Ivan Levkivskyi, PR19536)
• Use cache for binary operations (Ivan Levkivskyi, PR19523)
• Cache types of type objects (Ivan Levkivskyi, PR19514)
• Avoid duplicate work when checking boolean operations (Ivan Levkivskyi, PR19515)
• Optimize generic inference passes (Ivan Levkivskyi, PR19501)
• Speed up the default plugin (Jukka Lehtosalo, PRs19385 and19462)
• Remove nested imports from the default plugin (Ivan Levkivskyi, PR19388)
• Micro‑optimize type expansion (Jukka Lehtosalo, PR19461)
• Micro‑optimize type indirection (Jukka Lehtosalo, PR19460)
• Micro‑optimize the plugin framework (Jukka Lehtosalo, PR19464)
• Avoid temporary set creation in subtype checking (Jukka Lehtosalo, PR19463)
• Subtype checking micro‑optimization (Jukka Lehtosalo, PR19384)
• Return early where possible in subtype check (Stanislav Terliakov, PR19400)
• Deduplicate some types before joining (Stanislav Terliakov, PR19409)
• Speed up type checking by caching argument inference context (Jukka Lehtosalo, PR19323)
• Optimize binding method self argument type and deprecation checks (Ivan Levkivskyi, PR19556)
• Keep trivial instance types/aliases during expansion (Ivan Levkivskyi, PR19543)

Fixed‑Format Cache (Experimental)

... (truncated)

• df05f05 remove +dev from version
• 01a7a12 Update changelog for 1.18.2 (#19873)
• ca5abf0 Typeshed cherry-pick: Make type ofunitest.mock.Any a subclass ofAny (#1...
• 9d794b5 [mypyc] fix: inappropriateNones in f-strings (#19846)
• 2c0510c stubtest: additional guidance on errors when runtime is object.init (#19733)
• 2f3f03c Bump version to 1.18.2+dev for point release
• 7669841 Fix crash on recursive alias in indirection.py (#19845)
• See full diff incompare view

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