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Releases: psf/black
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Releases ยท psf/black
Release list
* 26.5.1
* 26.5.0
* 26.3.1
* 26.3.0
* 26.1.0
* 26.1a1
* 25.12.0
* 25.11.0
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26.5.1
26.5.1 Latest
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cobaltt7 released this 18 May 16:52
26.5.1
87928e6
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Learn about vigilant mode.
Stable style
* Fix unstable formatting of annotated assignments whose subscript annotation contains
an inline comment (e.g. x: list[ # pyright: ignore[...]) (#5130)
* Preserve inline comments (including # type: ignore) immediately before a
# fmt: skip line, avoiding AST equivalence failures (#5139)
Packaging
* Correct the version in the published executables (#5137)
Documentation
* Add Neovim integration guide covering conform.nvim, ALE, and simple command approaches
(#5124)
Assets 7
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cobaltt7 released this 16 May 17:56
26.5.0
d2490e2
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Learn about vigilant mode.
Highlights
* Add support for unpacking in comprehensions (PEP 798) and for lazy imports (PEP 810),
both new syntactic features in Python 3.15 (#5048)
* Python 3.15 is now supported. Compiled wheels are not yet provided for Python 3.15, so
performance may be slower than on existing Python versions. Wheels will be provided
once Python 3.15 is later in its release cycle. (#5127)
Stable style
* Fix # fmt: skip being ignored in nested if expressions with parenthesized in
clauses (#4903)
* Add syntactic support for Python 3.15 (#5048)
* Fix crash when an f-string follows a # fmt: off comment inside brackets (#5097)
* Preserve multiline compound statement headers when # fmt: skip is placed on the
colon line (#5117)
Preview style
* Improve heuristics around whether blank lines should appear before, within and after
groups of same-name decorated functions (such as @overload groups) in .pyi stub
files (#5021)
* Fix blank lines being removed between a function and a decorated class in .pyi stub
files (#5092)
* Prevent string merger from creating unsplittable long lines when a pragma comment
(e.g. # type: ignore) follows the closing bracket (#5096)
Packaging
* Run CI on 3.15 (#5127)
Output
* Improve parse error readability by showing multi-line output with an error pointer.
(#5068)
* Add SourceASTParseError to distinguish source parse failures from internal safety
errors, improving error reporting when Black's lenient parser accepts input that
ast.parse() rejects (#5080)
Blackd
* Return HTTP 400 (Bad Request) for source parse failures instead of HTTP 500, keeping
HTTP 500 only for genuine internal safety errors (#5080)
Integrations
* Added documentation for doctest formatting tools and updated the integrations index to
match (#4916)
Documentation
* Use "Version X.Y.Z" headings in changelog for stable permalink anchors on ReadTheDocs
(#5063)
* Note in the editor integrations that the SublimeText sublack plugin is archived and
unmaintained (#5082)
Assets 7
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26.3.1
26.3.1
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JelleZijlstra released this 12 Mar 03:35
26.3.1
c6755bb
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Learn about vigilant mode.
Stable style
* Prevent Jupyter notebook magic masking collisions from corrupting cells by using
exact-length placeholders for short magics and aborting if a placeholder can no longer
be unmasked safely (#5038)
Configuration
* Always hash cache filename components derived from --python-cell-magics so custom
magic names cannot affect cache paths (#5038)
Blackd
* Disable browser-originated requests by default, add configurable origin allowlisting
and request body limits, and bound executor submissions to improve backpressure
(#5039)
Assets 7
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26.3.0
26.3.0
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JelleZijlstra released this 06 Mar 17:41
26.3.0
35ea679
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Learn about vigilant mode.
Stable style
* Don't double-decode input, causing non-UTF-8 files to be corrupted (#4964)
* Fix crash on standalone comment in lambda default arguments (#4993)
* Preserve parentheses when # type: ignore comments would be merged with other
comments on the same line, preventing AST equivalence failures (#4888)
Preview style
* Fix bug where if guards in case blocks were incorrectly split when the pattern had
a trailing comma (#4884)
* Fix string_processing crashing on unassigned long string literals with trailing
commas (one-item tuples) (#4929)
* Simplify implementation of the power operator "hugging" logic (#4918)
Packaging
* Fix shutdown errors in PyInstaller builds on macOS by disabling multiprocessing in
frozen environments (#4930)
Performance
* Introduce winloop for windows as an alternative to uvloop (#4996)
* Remove deprecated function uvloop.install() in favor of uvloop.new_event_loop()
(#4996)
* Rename maybe_install_uvloop function to maybe_use_uvloop to simplify loop
installation and creation of either a uvloop/winloop evenloop or default eventloop
(#4996)
Output
* Emit a clear warning when the target Python version is newer than the running Python
version, since AST safety checks cannot parse newer syntax. Also replace the
misleading "INTERNAL ERROR" message with an actionable error explaining the version
mismatch (#4983)
Blackd
* Introduce winloop to be used when windows in use which enables blackd to run faster on
windows when winloop is installed. (#4996)
Integrations
* Remove unused gallery script (#5030)
* Harden parsing of black requirements in the GitHub Action when use_pyproject is
enabled so that only version specifiers are accepted and direct references such as
black @ https://... are rejected. Users should upgrade to the latest version of the
action as soon as possible. This update is received automatically when using
psf/black@stable, and is independent of the version of Black installed by the
action. (#5031)
Documentation
* Expand preview style documentation with detailed examples for wrap_comprehension_in,
simplify_power_operator_hugging, and wrap_long_dict_values_in_parens features
(#4987)
* Add detailed documentation for formatting Jupyter Notebooks (#5009)
Assets 7
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26.1.0
26.1.0
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cobaltt7 released this 18 Jan 04:49
26.1.0
6305bf1
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Learn about vigilant mode.
Highlights
Introduces the 2026 stable style (#4892), stabilizing the following changes:
* always_one_newline_after_import: Always force one blank line after import
statements, except when the line after the import is a comment or an import statement
(#4489)
* fix_fmt_skip_in_one_liners: Fix # fmt: skip behavior on one-liner declarations,
such as def foo(): return "mock" # fmt: skip, where previously the declaration would
have been incorrectly collapsed (#4800)
* fix_module_docstring_detection: Fix module docstrings being treated as normal
strings if preceded by comments (#4764)
* fix_type_expansion_split: Fix type expansions split in generic functions (#4777)
* multiline_string_handling: Make expressions involving multiline strings more compact
(#1879)
* normalize_cr_newlines: Add \r style newlines to the potential newlines to
normalize file newlines both from and to (#4710)
* remove_parens_around_except_types: Remove parentheses around multiple exception
types in except and except* without as (#4720)
* remove_parens_from_assignment_lhs: Remove unnecessary parentheses from the left-hand
side of assignments while preserving magic trailing commas and intentional multiline
formatting (#4865)
* standardize_type_comments: Format type comments which have zero or more spaces
between # and type: or between type: and value to # type: (value) (#4645)
The following change was not in any previous stable release:
* Regenerated the _width_table.py and added tests for the Khmer language (#4253)
This release alo bumps pathspec to v1 and fixes inconsistencies with Git's
.gitignore logic (#4958). Now, files will be ignored if a pattern matches them, even
if the parent directory is directly unignored. For example, Black would previously
format exclude/not_this/foo.py with this .gitignore:
exclude/ !exclude/not_this/
Now, exclude/not_this/foo.py will remain ignored. To ensure exclude/not_this/ and
all of it's children are included in formatting (and in Git), use this .gitignore:
*/exclude/* !*/exclude/not_this/
This new behavior matches Git. The leading */ are only necessary if you wish to ignore
matching subdirectories (like the previous behavior did), and not just matching root
directories.
Output
* Explicitly shutdown the multiprocessing manager when run in diff mode too (#4952)
Integrations
* Upgraded PyPI upload workflow to use Trusted Publishing (#4611)
Assets 7
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26.1a1
26.1a1 Pre-release
Pre-release
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cobaltt7 released this 08 Dec 01:46
26.1a1
dfd5408
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cobaltt7 cobalt
GPG key ID: CC6329B482F305A1
Verified
Learn about vigilant mode.
This is a preview of the Black stable style for 2026 (#4892). Please test it and
share your feedback!
The following formatting changes are included:
* always_one_newline_after_import: Always force one blank line after import
statements, except when the line after the import is a comment or an import statement
(#4489)
* fix_fmt_skip_in_one_liners: Fix # fmt: skip behavior on one-liner declarations,
such as def foo(): return "mock" # fmt: skip, where previously the declaration would
have been incorrectly collapsed (#4800)
* fix_module_docstring_detection: Fix module docstrings being treated as normal
strings if preceded by comments (#4764)
* fix_type_expansion_split: Fix type expansions split in generic functions (#4777)
* multiline_string_handling: Make expressions involving multiline strings more compact
(#1879)
* normalize_cr_newlines: Add \r style newlines to the potential newlines to
normalize file newlines both from and to (#4710)
* remove_parens_around_except_types: Remove parentheses around multiple exception
types in except and except* without as. See PEP 758 for details (#4720)
* remove_parens_from_assignment_lhs: Remove unnecessary parentheses from the left-hand
side of assignments while preserving magic trailing commas and intentional multiline
formatting (#4865)
* standardize_type_comments: Format type comments which have zero or more spaces
between # and type: or between type: and value to # type: (value) (#4645)
* Regenerated the _width_table.py and added tests for the Khmer language (#4253)
Assets 7
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25.12.0
25.12.0
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cobaltt7 released this 08 Dec 01:40
25.12.0
782e560
This commit was created on GitHub.com and signed with GitHubโs verified signature.
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Verified
Learn about vigilant mode.
Please test out the draft 2026 style in version 26.1a1! This style will be finalized in
the January release (26.1.0). Most of the changes in --preview will be in the 2026
stable style, but not all.
Please share your feedback!
This release (25.12.0) will still produce the 2025 style.
Highlights
* Black no longer supports running with Python 3.9 (#4842)
Stable style
* Fix bug where comments preceding # fmt: off/# fmt: on blocks were incorrectly
removed, particularly affecting Jupytext's # %% [markdown] comments (#4845)
* Fix crash when multiple # fmt: skip comments are used in a multi-part if-clause, on
string literals, or on dictionary entries with long lines (#4872)
* Fix possible crash when fmt: directives aren't on the top level (#4856)
Preview style
* Fix fmt: skip skipping the line after instead of the line it's on (#4855)
* Remove unnecessary parentheses from the left-hand side of assignments while preserving
magic trailing commas and intentional multiline formatting (#4865)
* Fix fix_fmt_skip_in_one_liners crashing on with statements (#4853)
* Fix fix_fmt_skip_in_one_liners crashing on annotated parameters (#4854)
* Fix new lines being added after imports with # fmt: skip on them (#4894)
Packaging
* Releases now include arm64 Windows binaries and wheels (#4814)
Integrations
* Add output-file input to GitHub Action psf/black to write formatter output to a
file for artifact capture and log cleanliness (#4824)
Assets 7
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25.11.0
25.11.0
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cooperlees released this 10 Nov 01:53
25.11.0
05f0a8c
This commit was created on GitHub.com and signed with GitHubโs verified signature.
GPG key ID: B5690EEEBB952194
Verified
Learn about vigilant mode.
Highlights
* Enable base 3.14 support (#4804)
* Add support for the new Python 3.14 t-string syntax introduced by PEP 750 (#4805)
Stable style
* Fix bug where comments between # fmt: off and # fmt: on were reformatted (#4811)
* Comments containing fmt directives now preserve their exact formatting instead of
being normalized (#4811)
Preview style
* Move multiline_string_handling from --unstable to --preview (#4760)
* Fix bug where module docstrings would be treated as normal strings if preceded by
comments (#4764)
* Fix bug where python 3.12 generics syntax split line happens weirdly (#4777)
* Standardize type comments to form # type: <value> (#4645)
* Fix fix_fmt_skip_in_one_liners preview feature to respect # fmt: skip for compound
statements with semicolon-separated bodies (#4800)
Configuration
* Add no_cache option to control caching behavior. (#4803)
Packaging
* Releases now include arm64 Linux binaries (#4773)
Output
* Write unchanged content to stdout when excluding formatting from stdin using pipes
(#4610)
Blackd
* Implemented BlackDClient. This simple python client allows to easily send formatting
requests to blackd (#4774)
Integrations
* Enable 3.14 base CI (#4804)
* Enhance GitHub Action psf/black to support the required-version major-version-only
"stability" format when using pyproject.toml (#4770)
* Improve error message for vim plugin users. It now handles independently vim version
* Vim: Warn on unsupported Vim and Python versions independently (#4772)
* Vim: Print the import paths when importing black fails (#4675)
* Vim: Fix handling of virtualenvs that have a different Python version (#4675)
Assets 6
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25.9.0
25.9.0
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MeGaGiGaGon released this 19 Sep 00:27
25.9.0
af0ba72
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GPG key ID: B5690EEEBB952194
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Learn about vigilant mode.
Highlights
* Remove support for pre-python 3.7 await/async as soft keywords/variable names
(#4676)
Stable style
* Fix crash while formatting a long del statement containing tuples (#4628)
* Fix crash while formatting expressions using the walrus operator in complex with
statements (#4630)
* Handle # fmt: skip followed by a comment at the end of file (#4635)
* Fix crash when a tuple appears in the as clause of a with statement (#4634)
* Fix crash when tuple is used as a context manager inside a with 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 on await ... (where ... is a literal Ellipsis) (#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 still
be formatted (#4552)
* Improve multiline_string_handling with ternaries and dictionaries (#4657)
* Fix a bug where string_processing would not split f-strings directly after
expressions (#4680)
* Wrap the in clause of comprehensions across lines if necessary (#4699)
* Remove parentheses around multiple exception types in except and except* without
as. (#4720)
* Add \r style newlines to the potential newlines to normalize file newlines both from
and to (#4710)
Parser
* Rewrite tokenizer to improve performance and compliance (#4536)
* Fix bug where certain unusual expressions (e.g., lambdas) were not accepted in type
parameter 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 Action psf/black to read Black version from an additional section in
pyproject.toml: [project.dependency-groups] (#4606)
* Build gallery docker image with python3-slim and reduce image size (#4686)
Documentation
* Add FAQ entry for windows emoji not displaying (#4714)
Assets 5
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25.1.0
25.1.0
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JelleZijlstra released this 29 Jan 04:15
25.1.0
8a737e7
This commit was created on GitHub.com and signed with GitHubโs verified signature.
GPG key ID: B5690EEEBB952194
Verified
Learn about vigilant mode.
Highlights
This release introduces the new 2025 stable style (#4558), stabilizing
the following changes:
* Normalize casing of Unicode escape characters in strings to lowercase (#2916)
* Fix inconsistencies in whether certain strings are detected as docstrings (#4095)
* Consistently add trailing commas to typed function parameters (#4164)
* Remove redundant parentheses in if guards for case blocks (#4214)
* Add parentheses to if clauses in case blocks when the line is too long (#4269)
* Whitespace before # fmt: skip comments is no longer normalized (#4146)
* Fix line length computation for certain expressions that involve the power operator (#4154)
* Check if there is a newline before the terminating quotes of a docstring (#4185)
* Fix type annotation spacing between * and more complex type variable tuple (#4440)
The following changes were not in any previous release:
* Remove parentheses around sole list items (#4312)
* Generic function definitions are now formatted more elegantly: parameters are
split over multiple lines first instead of type parameter definitions (#4553)
Stable style
* Fix formatting cells in IPython notebooks with magic methods and starting or trailing
empty lines (#4484)
* Fix crash when formatting with statements containing tuple generators/unpacking
(#4538)
Preview style
* Fix/remove string merging changing f-string quotes on f-strings with internal quotes
(#4498)
* Collapse multiple empty lines after an import into one (#4489)
* Prevent string_processing and wrap_long_dict_values_in_parens from removing
parentheses around long dictionary values (#4377)
* Move wrap_long_dict_values_in_parens from the unstable to preview style (#4561)
Packaging
* Store license identifier inside the License-Expression metadata field, see
PEP 639. (#4479)
Performance
* Speed up the is_fstring_start function in Black's tokenizer (#4541)
Integrations
* If using stdin with --stdin-filename set to a force excluded path, stdin won't be
formatted. (#4539)
Assets 5
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๐ 18 alexted, per1234, stevleibelt, danilo-css, JutasiR, gakugaku, firengate, bronsen, MorganKryze, pithecantrope, and 8 more reacted with thumbs up emoji ๐ 4 alexted, firengate, devavijitsingh, and Saraeutsza reacted with laugh emoji ๐ 10 gh640, hugovk, alexted, noelleleigh, firengate, EDM115, thinh9e, devavijitsingh, AleksMat, and Firas2515 reacted with hooray emoji โค๏ธ 9 alexted, jccamargo94, Julie-Fabre, firengate, barbashovtd, filmkorn, RanaUniverse, devavijitsingh, and Saraeutsza reacted with heart emoji ๐ 7 alexted, mr-c, aaravind100, ricardocanelas, firengate, devavijitsingh, and 13inccc reacted with rocket emoji ๐ 3 alexted, firengate, and devavijitsingh reacted with eyes emoji
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