# Example configuration for Black.

# NOTE: you have to use single-quoted strings in TOML for regular expressions.

# It's the equivalent of r-strings in Python.

# Multiline strings are treated as verbose regular expressions by Black.

# Use [ ] to denote a significant space character.

[tool.black]

line-length = 88

target-version = ["py310"]

include = '\.pyi?$'

extend-exclude = '''

/(

# The following are specific to Black, you probably don't want those.

tests/data/

| profiling/

)

'''

# We use the unstable style for formatting Black itself. If you

# want bug-free formatting, you should keep this off. If you want

# stable formatting across releases, you should also keep `preview = true`

# (which is implied by this flag) off.

unstable = true

# Build system information and other project-specific configuration below.

# NOTE: You don't need this in your own Black configuration.

[build-system]

requires = ["hatch-fancy-pypi-readme", "hatch-vcs>=0.3.0", "hatchling>=1.27.0"]

build-backend = "hatchling.build"

[project]

name = "black"

description = "The uncompromising code formatter."

license = "MIT"

license-files = ["LICENSE"]

requires-python = ">=3.10"

authors = [{ name = "Łukasz Langa", email = "[email protected]" }]

keywords = ["automation", "autopep8", "formatter", "gofmt", "pyfmt", "rustfmt", "yapf"]

classifiers = [

"Development Status :: 5 - Production/Stable",

"Environment :: Console",

"Intended Audience :: Developers",

"Operating System :: OS Independent",

"Programming Language :: Python",

"Programming Language :: Python :: 3 :: Only",

"Programming Language :: Python :: 3.10",

"Programming Language :: Python :: 3.11",

"Programming Language :: Python :: 3.12",

"Programming Language :: Python :: 3.13",

"Programming Language :: Python :: 3.14",

"Topic :: Software Development :: Libraries :: Python Modules",

"Topic :: Software Development :: Quality Assurance",

]

dependencies = [

"click>=8.0.0",

"mypy-extensions>=0.4.3",

"packaging>=22.0",

"pathspec>=1.0.0",

"platformdirs>=2",

"pytokens~=0.4.0",

"tomli>=1.1.0; python_version<'3.11'",

"typing-extensions>=4.0.1; python_version<'3.11'",

]

dynamic = ["readme", "version"]

[project.optional-dependencies]

colorama = ["colorama>=0.4.3"]

uvloop = [

"uvloop>=0.15.2; sys_platform != 'win32'",

"winloop>=0.5.0; sys_platform == 'win32'"

]

d = ["aiohttp>=3.10"]

jupyter = ["ipython>=7.8.0", "tokenize-rt>=3.2.0"]

[dependency-groups]

build = ["hatch==1.15.1", "hatch-fancy-pypi-readme", "hatch-vcs>=0.3.0", "virtualenv<21.0.0"]

wheels = ["cibuildwheel==3.3.1", "pypyp"]

binary = ["pyinstaller", "wheel>=0.45.1"]

dev = [{ include-group = "cov-tests" }, { include-group = "tox" }, "pre-commit"]

cov-tests = [

{ include-group = "coverage" },

{ include-group = "tests" },

"pytest-cov>=4.1.0",

]

docs = [

"docutils==0.21.2",

"furo==2025.12.19",

"myst-parser==4.0.1",

"sphinx-copybutton==0.5.2",

"sphinx==8.2.3",

"sphinxcontrib-programoutput==0.19",

]

tox = ["tox>=4.22"]

tests = ["pytest>=7", "pytest-xdist>=3.0.2"]

coverage = ["coverage>=5.3"]

fuzz = [{ include-group = "coverage" }, "hypothesis", "hypothesmith"]

diff-shades = [

"diff-shades @ https://github.com/ichard26/diff-shades/archive/stable.zip",

]

diff-shades-comment = ["click>=8.1.7", "packaging>=22.0", "urllib3"]

width-table = ["wcwidth==0.2.14"]

[project.scripts]

black = "black:patched_main"

blackd = "blackd:patched_main [d]"

[project.entry-points."validate_pyproject.tool_schema"]

black = "black.schema:get_schema"

[project.urls]

Documentation = "https://black.readthedocs.io/"

Changelog = "https://github.com/psf/black/blob/main/CHANGES.md"

Repository = "https://github.com/psf/black"

Issues = "https://github.com/psf/black/issues"

[tool.hatch.metadata.hooks.fancy-pypi-readme]

content-type = "text/markdown"

fragments = [{ path = "README.md" }, { path = "CHANGES.md" }]

[tool.hatch.version]

source = "vcs"

[tool.hatch.build.hooks.vcs]

version-file = "src/_black_version.py"

template = """

version = "{version}"

"""

[tool.hatch.build.targets.sdist]

exclude = ["/profiling"]

[tool.hatch.build.targets.wheel]

only-include = ["src"]

sources = ["src"]

# Note that we change the behaviour of this flag below

macos-max-compat = true

[tool.hatch.build.targets.wheel.hooks.mypyc]

enable-by-default = false

dependencies = ["hatch-mypyc>=0.16.0", "mypy==1.19.1"]

require-runtime-dependencies = true

exclude = [

# There's no good reason for blackd to be compiled.

"/src/blackd",

# Not performance sensitive, so save bytes + compilation time:

"/src/blib2to3/__init__.py",

"/src/blib2to3/pgen2/__init__.py",

"/src/black/output.py",

"/src/black/concurrency.py",

"/src/black/files.py",

"/src/black/report.py",

# Breaks the test suite when compiled (and is also useless):

"/src/black/debug.py",

# Compiled modules can't be run directly and that's a problem here:

"/src/black/__main__.py",

]

mypy-args = ["--ignore-missing-imports"]

options = { debug_level = "0" }

[tool.cibuildwheel]

build-verbosity = 1

# So these are the environments we target:

# - Python: CPython 3.10+ only

# - Architecture (64-bit only): amd64 / x86_64, universal2, and arm64

# - OS: Linux (no musl), Windows, and macOS

build = "cp31*"

skip = [

"*-manylinux_i686",

"*-musllinux_*",

"*-win32",

"pp*",

"cp31?t-*", # mypyc doesn't have great support for free threaded builds

]

test-groups = ["tests"]

test-command = 'pytest {project} -k "not incompatible_with_mypyc" -n auto'

test-extras = ["d", " jupyter"]

# Skip trying to test arm64 builds on Intel Macs. (so cross-compilation doesn't

# straight up crash)

test-skip = ["*-macosx_arm64", "*-macosx_universal2:arm64"]

[tool.cibuildwheel.environment]

HATCH_BUILD_HOOKS_ENABLE = "1"

MYPYC_OPT_LEVEL = "3"

MYPYC_DEBUG_LEVEL = "0"

CC = "clang"

[tool.cibuildwheel.linux]

manylinux-x86_64-image = "manylinux_2_28"

before-build = ["yum install -y clang"]

[tool.isort]

atomic = true

profile = "black"

line_length = 88

skip_gitignore = true

skip_glob = ["tests/data", "profiling"]

known_first_party = ["black", "blib2to3", "blackd", "_black_version"]

[tool.pytest.ini_options]

# Option below requires `tests/optional.py`

addopts = "--strict-config --strict-markers"

optional-tests = [

"no_blackd: run when `d` extra NOT installed",

"no_jupyter: run when `jupyter` extra NOT installed",

]

markers = ["incompatible_with_mypyc: run when testing mypyc compiled black"]

xfail_strict = true

filterwarnings = ["error"]

[tool.coverage.report]

omit = ["src/blib2to3/*", "tests/data/*", "*/site-packages/*", ".tox/*"]

[tool.coverage.run]

relative_files = true

branch = true

[tool.mypy]

# Specify the target platform details in config, so your developers are

# free to run mypy on Windows, Linux, or macOS and get consistent

# results.

python_version = "3.10"

mypy_path = "src"

strict = true

strict_bytes = true

local_partial_types = true

# Unreachable blocks have been an issue when compiling mypyc, let's try to avoid 'em in the first place.

warn_unreachable = true

implicit_reexport = true

show_error_codes = true

show_column_numbers = true

[[tool.mypy.overrides]]

module = ["pathspec.*", "IPython.*", "colorama.*", "tokenize_rt.*", "uvloop.*"]

ignore_missing_imports = true

# CI only checks src/, but in case users are running LSP or similar we explicitly ignore

# errors in test data files.

[[tool.mypy.overrides]]

module = ["tests.data.*"]

ignore_errors = true