This release provides a preview of Black's 2023 stable style. Black's default formatting style includes the following changes:
Enforce empty lines before classes and functions with sticky leading comments
(#3302) (22.12.0)
Reformat empty and whitespace-only files as either an empty file (if no newline is
present) or as a single newline character (if a newline is present) (#3348)
(22.12.0)
Implicitly concatenated strings used as function args are now wrapped inside
parentheses (#3307) (22.12.0)
Correctly handle trailing commas that are inside a line's leading non-nested parens
(#3370) (22.12.0)
--skip-string-normalization / -S now prevents docstring prefixes from being
normalized as expected (#3168) (since 22.8.0)
When using --skip-magic-trailing-comma or -C, trailing commas are stripped from
subscript expressions with more than 1 element (#3209) (22.8.0)
Implicitly concatenated strings inside a list, set, or tuple are now wrapped inside
parentheses (#3162) (22.8.0)
Fix a string merging/split issue when a comment is present in the middle of
implicitly concatenated strings on its own line (#3227) (22.8.0)
Docstring quotes are no longer moved if it would violate the line length limit
(#3044, #3430) (22.6.0)
Parentheses around return annotations are now managed (#2990) (22.6.0)
Remove unnecessary parentheses around awaited objects (#2991) (22.6.0)
Remove unnecessary parentheses in with statements (#2926) (22.6.0)
Remove trailing newlines after code block open (#3035) (22.6.0)
Code cell separators #%% are now standardised to # %% (#2919) (22.3.0)
Remove unnecessary parentheses from except statements (#2939) (22.3.0)
Remove unnecessary parentheses from tuple unpacking in for loops (#2945) (22.3.0)
Avoid magic-trailing-comma in single-element subscripts (#2942) (22.3.0)
Please try it out and give feedback here: psf/black#3407
A stable 23.1.0 release will follow in January 2023.
22.12.0
Preview style
Enforce empty lines before classes and functions with sticky leading comments (#3302)
Reformat empty and whitespace-only files as either an empty file (if no newline is
present) or as a single newline character (if a newline is present) (#3348)
Implicitly concatenated strings used as function args are now wrapped inside
parentheses (#3307)
Correctly handle trailing commas that are inside a line's leading non-nested parens
(#3370)
Fix a crash when a colon line is marked between # fmt: off and # fmt: on (#3439)
Preview style
Fix a crash in preview style with assert + parenthesized string (#3415)
Fix crashes in preview style with walrus operators used in function return annotations
and except clauses (#3423)
Do not put the closing quotes in a docstring on a separate line, even if the line is
too long (#3430)
Long values in dict literals are now wrapped in parentheses; correspondingly
unnecessary parentheses around short values in dict literals are now removed; long
string lambda values are now wrapped in parentheses (#3440)
Configuration
Packaging
Upgrade mypyc from 0.971 to 0.991 so mypycified Black can be built on armv7
(#3380)
Drop specific support for the tomli requirement on 3.11 alpha releases, working
around a bug that would cause the requirement not to be installed on any non-final
Python releases (#3448)
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Bumps black from 21.6b0 to 23.1a1.
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