[build-system]

requires = ["setuptools>=80", "setuptools-scm>=9"]

build-backend = "setuptools.build_meta"

[project]

name = "dask"

description = "Parallel PyData with Task Scheduling"

maintainers = [{name = "Matthew Rocklin", email = "mrocklin@gmail.com"}]

license = "BSD-3-Clause"

license-files = [

"LICENSE.txt",

"dask/array/NUMPY_LICENSE.txt",

]

keywords = ["task-scheduling parallel numpy pandas pydata"]

classifiers = [

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

"Intended Audience :: Developers",

"Intended Audience :: Science/Research",

"Operating System :: OS Independent",

"Programming Language :: Python",

"Programming Language :: Python :: 3",

"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",

"Programming Language :: Python :: Free Threading :: 1 - Unstable",

"Topic :: Scientific/Engineering",

"Topic :: System :: Distributed Computing",

]

readme = "README.rst"

urls = {Homepage = "https://github.com/dask/dask/"}

requires-python = ">=3.10"

dependencies = [

# NOTE: These are tested in `continuous_integration/test_imports.sh` If

# you modify these, make sure to change the corresponding line there.

"click >= 8.1",

"cloudpickle >= 3.0.0",

"fsspec >= 2021.09.0",

"packaging >= 20.0",

"partd >= 1.4.0",

"pyyaml >= 5.3.1",

"toolz >= 0.12.0",

# importlib.metadata has the following bugs fixed in 3.10.9 and 3.11.1

# https://github.com/python/cpython/issues/99130

# https://github.com/python/cpython/issues/98706

# Additionally, importlib.metadata.entry_points changed return type in 3.12

# https://docs.python.org/3/library/importlib.metadata.html#importlib.metadata.entry_points

"importlib_metadata >= 4.13.0; python_version < '3.12' ",

]

dynamic = ["version"]

[project.optional-dependencies]

# NOTE: These are tested in `continuous_integration/test_imports.sh` If

# you modify these, make sure to change the corresponding line there.

array = ["numpy >= 1.24"]

# keeping for backwards compatibility

bag = []

dataframe = [

"dask[array]",

"pandas >= 2.0",

"pyarrow >= 16.0",

]

distributed = ["distributed >= 2026.3.0,<2026.3.1"]

diagnostics = [

"bokeh >= 3.1.0",

"jinja2 >= 2.10.3",

]

# keeping for backwards compatibility

delayed = []

complete = [

"dask[array,dataframe,distributed,diagnostics]",

"pyarrow >= 16.0",

"lz4 >= 4.3.2",

]

test = [

"pandas[test]",

"pytest",

"pytest-cov",

"pytest-mock",

"pytest-rerunfailures",

"pytest-timeout",

"pytest-xdist",

"pre-commit",

]

[project.entry-points."dask.array.backends"]

cupy = "dask.array.cupy_entry_point:CupyBackendEntrypoint"

[project.scripts]

dask = "dask.__main__:main"

[tool.setuptools.packages]

find = {namespaces = false}

[tool.setuptools.package-data]

dask = ["py.typed"]

[tool.ruff]

line-length = 120

[tool.ruff.lint]

# By default, Ruff enables Flake8's F rules, along with a subset of the

# E rules, omitting any stylistic rules that overlap with the use of a

# formatter, like ruff format or Black.

# We specify additional rules with extend-select.

extend-select = [

"B",

"T10",

"ISC",

"TID",

"I",

"PGH",

"PLR",

"UP",

"FURB",

]

ignore = [

"B011", # Do not `assert False`, raise `AssertionError()`

"B018", # Found useless expression

"B028", # FIXME: No explicit `stacklevel` keyword argument found

"B904", # Within an `except` clause, raise exceptions with `raise ... from err` or `raise ... from None` to distinguish them from errors in exception handling

"B905", # `zip()` without an explicit `strict=` parameter

"E402", # Module level import not at top of file

"E714", # Test for object identity should be `is not`

"E721", # Use `is` and `is not` for type comparisons, or `isinstance()` for isinstance checks

"E731", # Do not assign a `lambda` expression, use a `def`

"E741", # Ambiguous variable name: `l`

"PLR0124", # Name compared with itself, consider replacing `... == ...`

"PLR0206", # Cannot have defined parameters for properties

"PLR09", # Too many statements, branches, arguments in function definition, statements, ...

"PLR1704", # Redefining argument with local name

"PLR1714", # Consider merging multiple comparisons

"PLR1730", # Replace `if` statement with `min()` or `max()`

"PLR1733", # Unnecessary lookup of dictionary value by key

"PLR2004", # Magic value used in comparison, consider replacing with a constant variable

"PLR2044", # Line with empty comment

"FURB157", # Verbose expression in `Decimal` constructor

]

[tool.ruff.lint.extend-per-file-ignores]

"__init__.py" = ["F401", "F403", "F811"]

"dask/tokenize.py" = ["F811"]

"*_test.py" = ["B011"]

"**/tests/*" = ["B011", "F811"]

"dask/array/svg.py" = ["UP032"]

[tool.setuptools_scm]

version_file = "dask/_version.py"

version_scheme = "post-release"

[tool.pytest.ini_options]

markers = [

"network: Test requires an internet connection",

"slow: Skipped unless --runslow passed",

"gpu: marks tests we want to run on GPUs",

"skip_with_pyarrow_strings: Tests that should be skipped when pyarrow string conversion is turned on",

"xfail_with_pyarrow_strings: Tests that should be xfailed when pyarrow string conversion is turned on",

"array_expr: Tests that are array-expr specific",

"normal_and_array_expr: Tests that should run with and without array-expr",

]

addopts = [

"-v",

"-ra",

"--strict-config",

"--strict-markers",

"--durations=10",

"--color=yes",

"--cov-config=pyproject.toml",

]

filterwarnings = [

"error",

# With no network access, distributed raises a warning when detecting local IP address

"ignore:Couldn't detect a suitable IP address:RuntimeWarning:distributed",

# FIXME spurious shutdown of distributed workers and/or sqlite3

"module:Exception ignored:pytest.PytestUnraisableExceptionWarning::",

"module:unclosed database in <sqlite3.Connection:ResourceWarning::",

# Additional ignores only needed in the mindeps environments

"ignore:distutils Version classes are deprecated. Use packaging.version instead.:DeprecationWarning:",

"ignore:_SixMetaPathImporter.find_spec:ImportWarning:",

"ignore:`product` is deprecated as of NumPy 1.25.0:DeprecationWarning:",

"ignore:Starting with ImageIO v3:DeprecationWarning:skimage",

"ignore:TileDB is a multithreading library and deadlocks are likely if fork\\(\\) is called after a TileDB context has been created:UserWarning:",

]

log_cli_level = "INFO"

xfail_strict = true

# pytest-timeout settings

# 'thread' kills off the whole test suite. 'signal' only kills the offending test.

# However, 'signal' doesn't work on Windows (due to lack of SIGALRM).

# The CI script modifies this config file on the fly on Linux and MacOS.

timeout_method = "thread"

# This should not be reduced; Windows CI has been observed to be occasionally

# exceptionally slow.

timeout = 300

[tool.mypy]

# Silence errors about Python 3.9-style delayed type annotations on Python 3.8

python_version = "3.10"

# See https://github.com/python/mypy/issues/12286 for automatic multi-platform support

platform = "linux"

# platform = win32

# platform = darwin

disallow_untyped_decorators = true

ignore_missing_imports = true

no_implicit_optional = true

warn_redundant_casts = true

warn_unused_ignores = true

warn_unreachable = true

exclude = "dask/dataframe/dask_expr/"

[[tool.mypy.overrides]]

# Recent or recently overhauled modules featuring stricter validation

module = [

"dask.order",

]

disallow_untyped_defs = true

[tool.codespell]

ignore-words-list = "coo,dout,excpt,fo,medias,nd,nin,notin,ser"

skip = "docs/source/changelog.rst"

[tool.coverage.run]

omit = [

"*/test_*.py",

"dask/_version.py",

]

source = ["dask"]

[tool.coverage.report]

# Regexes for lines to exclude from consideration

exclude_lines = [

"if TYPE_CHECKING:",

"pragma: no cover",

"raise AssertionError",

"raise NotImplementedError",

]

ignore_errors = true