pyproject.toml

# this file contains:
# 1 build system configuration
# 2 project configuration
# 3 tool configuration, for:
# - hatch
# - ruff
# - pytest
# - mypy

[build-system]
requires = ["hatchling"]
build-backend = "hatchling.build"

[project]
name = "altair"
authors = [{ name = "Vega-Altair Contributors" }]
dependencies = [
    "typing_extensions>=4.10.0; python_version<\"3.14\"",
    "jinja2",
    # If you update the minimum required jsonschema version, also update it in build.yml
    "jsonschema>=3.0",
    "packaging",
    "narwhals>=1.14.2"
]
description = "Vega-Altair: A declarative statistical visualization library for Python."
readme = "README.md"
keywords = [
    "declarative",
    "statistics",
    "visualization",
    "interactive",
    "json",
    "vega-lite",
]
requires-python = ">=3.9"
dynamic = ["version"]
license = {file = "LICENSE"}
classifiers = [
    "Development Status :: 5 - Production/Stable",
    "Environment :: Console",
    "Intended Audience :: Science/Research",
    "License :: OSI Approved :: BSD License",
    "Natural Language :: English",
    "Programming Language :: Python :: 3.9",
    "Programming Language :: Python :: 3.10",
    "Programming Language :: Python :: 3.11",
    "Programming Language :: Python :: 3.12",
    "Programming Language :: Python :: 3.13",
    "Typing :: Typed",
]

[project.urls]
Documentation = "https://altair-viz.github.io"
Source = "https://github.com/vega/altair"

[project.optional-dependencies]
save = [
    "vl-convert-python>=1.7.0",
]
all = [
    "altair[save]",
    "vega_datasets>=0.9.0",
    "pandas>=1.1.3",
    "numpy",
    "pyarrow>=11",
    "vegafusion[embed]>=1.6.6",
    "anywidget>=0.9.0",
    "altair_tiles>=0.3.0"
]
dev = [
    "hatch>=1.13.0",
    "ruff>=0.6.0",
    "duckdb>=1.0",
    "ipython[kernel]",
    "pandas>=1.1.3",
    "pyarrow-stubs",
    "pytest",
    "pytest-cov",
    "pytest-xdist[psutil]~=3.5",
    "mistune",
    "mypy",
    "pandas-stubs",
    "types-jsonschema",
    "types-setuptools",
    "geopandas",
    "polars>=0.20.3",
]
doc = [
    "sphinx",
    "docutils",
    "sphinxext_altair",
    "jinja2",
    "numpydoc",
    "pillow>=9,<10",
    "pydata-sphinx-theme>=0.14.1",
    "myst-parser",
    "sphinx_copybutton",
    "sphinx-design",
    "scipy",
]

[tool.hatch.version]
path = "altair/__init__.py"

[tool.hatch.metadata]
allow-direct-references = true

[tool.hatch.build]
include = ["/altair"]
artifacts = ["altair/jupyter/js/index.js"]

[tool.hatch.envs.default]
features = ["all", "dev"]
# https://hatch.pypa.io/latest/how-to/environment/select-installer/#enabling-uv
installer = "uv"

[tool.hatch.envs.default.scripts]
generate-schema-wrapper = [
    "mypy tools",
    "python tools/generate_schema_wrapper.py",
    "test"
]
test = [
    "ruff check .",
    "ruff format --diff --check .",
    "mypy altair tests",
    "python -m pytest --pyargs --numprocesses=logical --doctest-modules tests altair tools",
]
test-coverage = "python -m pytest --pyargs --doctest-modules --cov=altair --cov-report term altair"
test-coverage-html = "python -m pytest --pyargs --doctest-modules --cov=altair --cov-report html altair"
update-init-file = [
    "python tools/update_init_file.py",
    "ruff check .",
    "ruff format .",
]
test-fast = [
    "ruff check .", "ruff format .",
    "pytest -p no:randomly -n logical --numprocesses=logical --doctest-modules tests altair tools -m \"not slow\" {args}"
]
test-slow = [
    "ruff check .", "ruff format .",
    "pytest -p no:randomly -n logical --numprocesses=logical --doctest-modules tests altair tools -m \"slow\" {args}"
]

[tool.hatch.envs.hatch-test]
# https://hatch.pypa.io/latest/tutorials/testing/overview/
features = ["all", "dev", "doc"]
# https://pytest-xdist.readthedocs.io/en/latest/distribution.html#running-tests-across-multiple-cpus
default-args = ["--numprocesses=logical","--doctest-modules", "tests", "altair", "tools"]
parallel = true
[[tool.hatch.envs.hatch-test.matrix]]
python = ["3.9", "3.10", "3.11", "3.12", "3.13"]
[tool.hatch.envs.hatch-test.scripts]
run = [
    "ruff check .", 
    "ruff format --diff --check .",
    "mypy altair tests",
    "pytest{env:HATCH_TEST_ARGS:} {args}"
]
run-cov = "coverage run -m pytest{env:HATCH_TEST_ARGS:} {args}"
cov-combine = "coverage combine"
cov-report = "coverage report"

[tool.hatch.envs.doc]
features = ["all", "dev", "doc"]

[tool.hatch.envs.doc.scripts]
clean = "rm -rf doc/_build"
clean-generated = ["rm -rf doc/user_guide/generated", "rm -rf doc/gallery"]
clean-all = ["clean", "clean-generated", "rm -rf doc/_images"]
clean-win = "if exist doc\\_build rd /s /q doc\\_build"
clean-generated-win = [
    "if exist doc\\user_guide\\generated rd /s /q doc\\user_guide\\generated",
    "if exist doc\\gallery rd /s /q doc\\gallery",
]
clean-all-win = [
    "clean-win",
    "clean-generated-win",
    "if exist doc\\_images rd /s /q doc\\_images",
]
build-html = [
    "mkdir -p doc/_images",
    "sphinx-build -b html -d doc/_build/doctrees doc doc/_build/html",
]
build-html-win = [
    "if not exist doc\\_images md doc\\_images",
    "sphinx-build -b html -d doc\\_build\\doctrees doc doc\\_build\\html",
]
doctest = "sphinx-build -b doctest -d doc/_build/doctrees doc doc/_build/doctest"
coverage = "sphinx-build -b coverage -d doc/_build/doctrees doc doc/_build/coverage"
serve = "(cd doc/_build/html && python -m http.server)"
publish-clean-build = [
    "clean-all",
    "build-html",
    "(cd doc && bash sync_website.sh)",
]

[tool.ruff]
target-version = "py39"
line-length = 88
indent-width = 4
exclude = [
    ".git",
    "build",
    "__pycache__",
    "tests/examples_arguments_syntax",
    "tests/examples_methods_syntax",
]

[tool.ruff.lint]
# https://docs.astral.sh/ruff/preview/
preview = true

# https://docs.astral.sh/ruff/settings/#lint_extend-safe-fixes
extend-safe-fixes=[
    # unnecessary-comprehension-in-call
    "C419",
    # literal-membership
    "PLR6201",
    # from __future__ import annotations #
    # ---------------------------------- # 
    "UP006",
    "UP007",
    "UP008",
    "TCH",
    # assign exception msg to variable #
    # -------------------------------- #
    "EM101",
    "EM102",
    # trailing-whitespace
    "W291",
    # blank line contains whitespace
    "W293",
    # unsorted-dunder-all
    "RUF022",
    # pydocstyle #
    # ---------- #
    # fits-on-one-line
    "D200",
    # escape-sequence-in-docstring
    "D301",
    # ends-in-period
    "D400",
    # missing-return-type-special-method 
    "ANN204",
    # unnecessary-dict-comprehension-for-iterable
    "C420",
]

# https://docs.astral.sh/ruff/preview/#using-rules-that-are-in-preview
extend-select=[
    # refurb
    "FURB", 
    # pylint (preview) autofix #
    # ------------------------ #
    # unnecessary-dunder-call
    "PLC2801", 
    # unnecessary-dict-index-lookup
    "PLR1733", 
    # unnecessary-list-index-lookup
    "PLR1736",
    # literal-membership
    "PLR6201",
    # unspecified-encoding
    "PLW1514",
]
select = [
    # flake8-bugbear
    "B",
    # flake8-comprehensions
    "C4",
    # pycodestyle-error
    "E",
    # flake8-errmsg
    "EM",
    # pyflakes
    "F",
    # flake8-future-annotations
    "FA",
    # flynt
    "FLY",
    # flake8-pie
    "PIE",
    # flake8-pytest-style
    "PT",
    # flake8-use-pathlib
    "PTH",
    # Ruff-specific rules
    "RUF",
    # flake8-simplify
    "SIM",
    # flake8-type-checking
    "TCH",
    # flake8-tidy-imports
    "TID",
    # pyupgrade
    "UP",
    # pycodestyle-warning
    "W",
    # pylint (stable) autofix #
    # ----------------------- #
    # iteration-over-set
    "PLC0208",
    # manual-from-import
    "PLR0402",
    # useless-return
    "PLR1711",
    # repeated-equality-comparison
    "PLR1714",
    # collapsible-else-if
    "PLR5501",
    # useless-else-on-loop
    "PLW0120",
    # subprocess-run-without-check
    "PLW1510",
    # nested-min-max
    "PLW3301",
    # pydocstyle #
    # ---------- #
    "D",
    # multi-line-summary-second-line
    "D213",
    # numpy-specific-rules
    "NPY",
    # flake8-annotations
    "ANN",
    # unsorted-imports
    "I001",
    # complex-structure
    "C901",
]
ignore = [  
    # Whitespace before ':'
    "E203",
    # Too many leading '#' for block comment
    "E266",
    # Line too long
    "E501",
    # zip() without an explicit strict= parameter set.
    # python>=3.10 only
    "B905",
    # mutable-class-default
    "RUF012",
    # suppressible-exception
    # https://github.com/vega/altair/pull/3431#discussion_r1629808660
    "SIM105",
    # pydocstyle/ https://docs.astral.sh/ruff/formatter/#conflicting-lint-rules #
    # ------------------------------------------------------------------------- #
    # undocumented-public-module
    "D100",
    # undocumented-public-class
    "D101",
    # undocumented-public-method  
    "D102",
    # undocumented-public-function  
    "D103",
    # undocumented-public-package   
    "D104",
    # undocumented-magic-method 
    "D105",
    # undocumented-public-init  
    "D107",
    # indent-with-spaces
    "D206",
    # multi-line-summary-first-line ((D213) is the opposite of this)
    "D212",
    # Imperative mood   
    "D401",
    # Blank line after last section 
    "D413",
    # doc-line-too-long
    "W505",
    # Any as annotation
    "ANN401" 
]
# https://docs.astral.sh/ruff/settings/#lintpydocstyle
pydocstyle={ convention="numpy" }
mccabe={ max-complexity=10 }

[tool.ruff.lint.isort]
classes = ["expr", "datum"]
extra-standard-library = ["typing_extensions"]
known-first-party=[
    "altair_tiles",
    "sphinxext_altair",
    "vega_datasets",
    "vegafusion",
    "vl_convert",
]
split-on-trailing-comma = false

[tool.ruff.lint.flake8-tidy-imports.banned-api]
# https://docs.astral.sh/ruff/settings/#lint_flake8-tidy-imports_banned-api
"typing.Optional".msg = """
Use `Union[T, None]` instead.
`typing.Optional` is likely to be confused with `altair.typing.Optional`, \
which have a similar but different semantic meaning.
See https://github.com/vega/altair/pull/3449
"""
"narwhals.dependencies".msg = """
Import `dependencies` from `narwhals.stable.v1` instead.
"""
"narwhals.typing".msg = """
Import `typing` from `narwhals.stable.v1` instead.
"""
"narwhals.dtypes".msg = """
Import `dtypes` from `narwhals.stable.v1` instead.
"""

[tool.ruff.lint.per-file-ignores]
# Only enforce type annotation rules on public api
"!altair/vegalite/v5/api.py" = ["ANN"]
# Allow complex if/elif branching during tests
"tests/**/*.py"= ["C901"]


[tool.ruff.format]
quote-style = "double"
indent-style = "space"
skip-magic-trailing-comma = false
line-ending = "lf"
# https://docs.astral.sh/ruff/formatter/#docstring-formatting
docstring-code-format = true
docstring-code-line-length = 88

[tool.pytest.ini_options]
# Pytest does not need to search these folders for test functions.
# They contain examples which are being executed by the
# test_examples tests.
norecursedirs = ["tests/examples_arguments_syntax", "tests/examples_methods_syntax"]
addopts = ["--numprocesses=logical"]
# https://docs.pytest.org/en/stable/how-to/mark.html#registering-marks
markers = [
    "slow: Label tests as slow (deselect with '-m \"not slow\"')"
]

[tool.mypy]
warn_unused_ignores = true
pretty = true

[[tool.mypy.overrides]]
module = [
    "vega_datasets.*",
    "pyarrow.*",
    "yaml.*",
    "pandas.lib.*",
    "geopandas.*",
    "nbformat.*",
    "ipykernel.*",
    "ibis.*",
    "vegafusion.*",
]
ignore_missing_imports = true

[tool.pyright]
enableExperimentalFeatures=true
extraPaths=["./tools"]
pythonPlatform="All"
pythonVersion="3.9"
reportTypedDictNotRequiredAccess="none"
reportIncompatibleMethodOverride="none"
reportUnusedExpression="none"
reportUnsupportedDunderAll="none"
include=[
    "./altair/**/*.py",
    "./doc/*.py",
	"./tests/**/*.py",
	"./tools/**/*.py",
    "./sphinxext/**/*.py",
]
ignore=[
    "./altair/vegalite/v5/schema/channels.py",  # 716 warns
    "./altair/vegalite/v5/schema/mixins.py",    # 1001 warns
    "./altair/jupyter/",                        # Mostly untyped
    "./tests/test_jupyter_chart.py",            # Based on untyped module
    "../../../**/Lib",                          # stdlib
]