Change Log
Unreleased
Black
- reindent docstrings when reindenting code around it (#1053)
- show colored diffs (#1266)
- move to ‘py3’ tagged wheels (#1388)
- remove deprecated
--py36
option (#1236)
- add
--force-exclude
argument (#1032)
Vim plugin
- prefer virtualenv packages over global packages (#1383)
19.10b0
- added support for PEP 572 assignment expressions (#711)
- added support for PEP 570 positional-only arguments (#943)
- added support for async generators (#593)
- added support for pre-splitting collections by putting an explicit trailing comma
inside (#826)
- added
black -c
as a way to format code passed from the command line (#761)
- –safe now works with Python 2 code (#840)
- fixed grammar selection for Python 2-specific code (#765)
- fixed feature detection for trailing commas in function definitions and call sites
(#763)
# fmt: off
/# fmt: on
comment pairs placed multiple times within the same block of
code now behave correctly (#1005)
- Black no longer crashes on Windows machines with more than 61 cores (#838)
- Black no longer crashes on standalone comments prepended with a backslash (#767)
- Black no longer crashes on
from
… import
blocks with comments (#829)
- Black no longer crashes on Python 3.7 on some platform configurations (#494)
- Black no longer fails on comments in from-imports (#671)
- Black no longer fails when the file starts with a backslash (#922)
- Black no longer merges regular comments with type comments (#1027)
- Black no longer splits long lines that contain type comments (#997)
- removed unnecessary parentheses around
yield
expressions (#834)
- added parentheses around long tuples in unpacking assignments (#832)
- added parentheses around complex powers when they are prefixed by a unary operator
(#646)
- fixed bug that led Black format some code with a line length target of 1 (#762)
- Black no longer introduces quotes in f-string subexpressions on string boundaries
(#863)
- if Black puts parenthesis around a single expression, it moves comments to the
wrapped expression instead of after the brackets (#872)
blackd
now returns the version of Black in the response headers (#1013)
blackd
can now output the diff of formats on source code when the X-Diff
header is
provided (#969)
19.3b0
- new option
--target-version
to control which Python versions Black-formatted code
should target (#618)
- deprecated
--py36
(use --target-version=py36
instead) (#724)
- Black no longer normalizes numeric literals to include
_
separators (#696)
- long
del
statements are now split into multiple lines (#698)
- type comments are no longer mangled in function signatures
- improved performance of formatting deeply nested data structures (#509)
- Black now properly formats multiple files in parallel on Windows (#632)
- Black now creates cache files atomically which allows it to be used in parallel
pipelines (like
xargs -P8
) (#673)
- Black now correctly indents comments in files that were previously formatted with
tabs (#262)
blackd
now supports CORS (#622)
18.9b0
- numeric literals are now formatted by Black (#452, #461, #464, #469):
- numeric literals are normalized to include
_
separators on Python 3.6+ code
- added
--skip-numeric-underscore-normalization
to disable the above behavior and
leave numeric underscores as they were in the input
- code with
_
in numeric literals is recognized as Python 3.6+
- most letters in numeric literals are lowercased (e.g., in
1e10
, 0x01
)
- hexadecimal digits are always uppercased (e.g.
0xBADC0DE
)
- added
blackd
, see its documentation for more info (#349)
- adjacent string literals are now correctly split into multiple lines (#463)
- trailing comma is now added to single imports that don’t fit on a line (#250)
- cache is now populated when
--check
is successful for a file which speeds up
consecutive checks of properly formatted unmodified files (#448)
- whitespace at the beginning of the file is now removed (#399)
- fixed mangling pweave and
Spyder IDE special comments (#532)
- fixed unstable formatting when unpacking big tuples (#267)
- fixed parsing of
__future__
imports with renames (#389)
- fixed scope of
# fmt: off
when directly preceding yield
and other nodes (#385)
- fixed formatting of lambda expressions with default arguments (#468)
- fixed
async for
statements: Black no longer breaks them into separate lines (#372)
- note: the Vim plugin stopped registering
,=
as a default chord as it turned out to
be a bad idea (#415)
18.6b4
- hotfix: don’t freeze when multiple comments directly precede
# fmt: off
(#371)
18.6b3
- typing stub files (
.pyi
) now have blank lines added after constants (#340)
# fmt: off
and # fmt: on
are now much more dependable:
- they now work also within bracket pairs (#329)
- they now correctly work across function/class boundaries (#335)
- they now work when an indentation block starts with empty lines or misaligned
comments (#334)
- made Click not fail on invalid environments; note that Click is right but the
likelihood we’ll need to access non-ASCII file paths when dealing with Python source
code is low (#277)
- fixed improper formatting of f-strings with quotes inside interpolated expressions
(#322)
- fixed unnecessary slowdown when long list literals where found in a file
- fixed unnecessary slowdown on AST nodes with very many siblings
- fixed cannibalizing backslashes during string normalization
- fixed a crash due to symbolic links pointing outside of the project directory (#338)
18.6b2
- added
--config
(#65)
- added
-h
equivalent to --help
(#316)
- fixed improper unmodified file caching when
-S
was used
- fixed extra space in string unpacking (#305)
- fixed formatting of empty triple quoted strings (#313)
- fixed unnecessary slowdown in comment placement calculation on lines without comments
18.6b1
- hotfix: don’t output human-facing information on stdout (#299)
- hotfix: don’t output cake emoji on non-zero return code (#300)
18.6b0
- added
--include
and --exclude
(#270)
- added
--skip-string-normalization
(#118)
- added
--verbose
(#283)
- the header output in
--diff
now actually conforms to the unified diff spec
- fixed long trivial assignments being wrapped in unnecessary parentheses (#273)
- fixed unnecessary parentheses when a line contained multiline strings (#232)
- fixed stdin handling not working correctly if an old version of Click was used (#276)
- Black now preserves line endings when formatting a file in place (#258)
18.5b1
- added
--pyi
(#249)
- added
--py36
(#249)
- Python grammar pickle caches are stored with the formatting caches, making Black
work in environments where site-packages is not user-writable (#192)
- Black now enforces a PEP 257 empty line after a class-level docstring (and/or
fields) and the first method
- fixed invalid code produced when standalone comments were present in a trailer that
was omitted from line splitting on a large expression (#237)
- fixed optional parentheses being removed within
# fmt: off
sections (#224)
- fixed invalid code produced when stars in very long imports were incorrectly wrapped
in optional parentheses (#234)
- fixed unstable formatting when inline comments were moved around in a trailer that was
omitted from line splitting on a large expression (#238)
- fixed extra empty line between a class declaration and the first method if no class
docstring or fields are present (#219)
- fixed extra empty line between a function signature and an inner function or inner
class (#196)
18.5b0
- call chains are now formatted according to the
fluent interfaces style (#67)
- data structure literals (tuples, lists, dictionaries, and sets) are now also always
exploded like imports when they don’t fit in a single line (#152)
- slices are now formatted according to PEP 8 (#178)
- parentheses are now also managed automatically on the right-hand side of assignments
and return statements (#140)
- math operators now use their respective priorities for delimiting multiline
expressions (#148)
- optional parentheses are now omitted on expressions that start or end with a bracket
and only contain a single operator (#177)
- empty parentheses in a class definition are now removed (#145, #180)
- string prefixes are now standardized to lowercase and
u
is removed on Python 3.6+
only code and Python 2.7+ code with the unicode_literals
future import (#188, #198,
#199)
- typing stub files (
.pyi
) are now formatted in a style that is consistent with PEP
484 (#207, #210)
- progress when reformatting many files is now reported incrementally
- fixed trailers (content with brackets) being unnecessarily exploded into their own
lines after a dedented closing bracket (#119)
- fixed an invalid trailing comma sometimes left in imports (#185)
- fixed non-deterministic formatting when multiple pairs of removable parentheses were
used (#183)
- fixed multiline strings being unnecessarily wrapped in optional parentheses in long
assignments (#215)
- fixed not splitting long from-imports with only a single name
- fixed Python 3.6+ file discovery by also looking at function calls with unpacking.
This fixed non-deterministic formatting if trailing commas where used both in function
signatures with stars and function calls with stars but the former would be
reformatted to a single line.
- fixed crash on dealing with optional parentheses (#193)
- fixed “is”, “is not”, “in”, and “not in” not considered operators for splitting
purposes
- fixed crash when dead symlinks where encountered
18.4a4
- don’t populate the cache on
--check
(#175)
18.4a3
- added a “cache”; files already reformatted that haven’t changed on disk won’t be
reformatted again (#109)
--check
and --diff
are no longer mutually exclusive (#149)
- generalized star expression handling, including double stars; this fixes
multiplication making expressions “unsafe” for trailing commas (#132)
- Black no longer enforces putting empty lines behind control flow statements (#90)
- Black now splits imports like “Mode 3 + trailing comma” of isort (#127)
- fixed comment indentation when a standalone comment closes a block (#16, #32)
- fixed standalone comments receiving extra empty lines if immediately preceding a
class, def, or decorator (#56, #154)
- fixed
--diff
not showing entire path (#130)
- fixed parsing of complex expressions after star and double stars in function calls
(#2)
- fixed invalid splitting on comma in lambda arguments (#133)
- fixed missing splits of ternary expressions (#141)
18.4a2
- fixed parsing of unaligned standalone comments (#99, #112)
- fixed placement of dictionary unpacking inside dictionary literals (#111)
- Vim plugin now works on Windows, too
- fixed unstable formatting when encountering unnecessarily escaped quotes in a string
(#120)
18.4a1
- added
--quiet
(#78)
- added automatic parentheses management (#4)
- added pre-commit integration (#103, #104)
- fixed reporting on
--check
with multiple files (#101, #102)
- fixed removing backslash escapes from raw strings (#100, #105)
18.4a0
- added
--diff
(#87)
- add line breaks before all delimiters, except in cases like commas, to better comply
with PEP 8 (#73)
- standardize string literals to use double quotes (almost) everywhere (#75)
- fixed handling of standalone comments within nested bracketed expressions; Black
will no longer produce super long lines or put all standalone comments at the end of
the expression (#22)
- fixed 18.3a4 regression: don’t crash and burn on empty lines with trailing whitespace
(#80)
- fixed 18.3a4 regression:
# yapf: disable
usage as trailing comment would cause
Black to not emit the rest of the file (#95)
- when CTRL+C is pressed while formatting many files, Black no longer freaks out with
a flurry of asyncio-related exceptions
- only allow up to two empty lines on module level and only single empty lines within
functions (#74)
18.3a4
# fmt: off
and # fmt: on
are implemented (#5)
- automatic detection of deprecated Python 2 forms of print statements and exec
statements in the formatted file (#49)
- use proper spaces for complex expressions in default values of typed function
arguments (#60)
- only return exit code 1 when –check is used (#50)
- don’t remove single trailing commas from square bracket indexing (#59)
- don’t omit whitespace if the previous factor leaf wasn’t a math operator (#55)
- omit extra space in kwarg unpacking if it’s the first argument (#46)
- omit extra space in
Sphinx auto-attribute comments
(#68)
18.3a3
- don’t remove single empty lines outside of bracketed expressions (#19)
- added ability to pipe formatting from stdin to stdin (#25)
- restored ability to format code with legacy usage of
async
as a name (#20, #42)
- even better handling of numpy-style array indexing (#33, again)
18.3a2
- changed positioning of binary operators to occur at beginning of lines instead of at
the end, following
a recent change to PEP 8
(#21)
- ignore empty bracket pairs while splitting. This avoids very weirdly looking
formattings (#34, #35)
- remove a trailing comma if there is a single argument to a call
- if top level functions were separated by a comment, don’t put four empty lines after
the upper function
- fixed unstable formatting of newlines with imports
- fixed unintentional folding of post scriptum standalone comments into last statement
if it was a simple statement (#18, #28)
- fixed missing space in numpy-style array indexing (#33)
- fixed spurious space after star-based unary expressions (#31)
18.3a1
- added
--check
- only put trailing commas in function signatures and calls if it’s safe to do so. If
the file is Python 3.6+ it’s always safe, otherwise only safe if there are no
*args
or **kwargs
used in the signature or call. (#8)
- fixed invalid spacing of dots in relative imports (#6, #13)
- fixed invalid splitting after comma on unpacked variables in for-loops (#23)
- fixed spurious space in parenthesized set expressions (#7)
- fixed spurious space after opening parentheses and in default arguments (#14, #17)
- fixed spurious space after unary operators when the operand was a complex expression
(#15)
18.3a0
- first published version, Happy 🍰 Day 2018!
- alpha quality
- date-versioned (see: https://calver.org/)