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>=0.8.4",
    "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",
    "taskipy>=1.14.1",
    "tomli>=2.2.1",
]
doc = [
    "sphinx",
    "docutils",
    "sphinxext_altair",
    "jinja2",
    "numpydoc",
    "pillow",
    "pydata-sphinx-theme>=0.14.1",
    "myst-parser",
    "sphinx_copybutton",
    "sphinx-design",
    "scipy",
    "scipy-stubs; python_version>=\"3.10\"",
]

[tool.altair.vega]
# Minimum/exact versions, for projects under the `vega` organization
vega-datasets     = "v2.11.0" # https://github.com/vega/vega-datasets
vega-embed        = "6"       # https://github.com/vega/vega-embed
vega-lite         = "v5.21.0" # https://github.com/vega/vega-lite

[tool.hatch]
build    = { include = ["/altair"], artifacts = ["altair/jupyter/js/index.js"] }
metadata = { allow-direct-references = true }
version  = { path = "altair/__init__.py" }

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

[tool.hatch.envs.hatch-test]
# https://hatch.pypa.io/latest/tutorials/testing/overview/
features = ["all", "dev", "doc"]
matrix   = [{ python = ["3.9", "3.10", "3.11", "3.12", "3.13"] }]

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

[tool.ruff.lint]
extend-safe-fixes = [ # https://docs.astral.sh/ruff/settings/#lint_extend-safe-fixes
    "ANN204",  # missing-return-type-special-method 
    "C419",    # unnecessary-comprehension-in-call
    "C420",    # unnecessary-dict-comprehension-for-iterable
    "D200",    # fits-on-one-line
    "D301",    # escape-sequence-in-docstring
    "D400",    # ends-in-period
    "EM101",   # raw-string-in-exception
    "EM102",   # f-string-in-exception
    "PLR6201", # literal-membership
    "TC",      # flake8-type-checking
    "UP006",   # non-pep585-annotation
    "UP007",   # non-pep604-annotation-union
    "UP008",   # super-call-with-parameters
    "W291",    # trailing-whitespace
    "W293",    # blank line contains whitespace
]
extend-select = [ # https://docs.astral.sh/ruff/preview/#using-rules-that-are-in-preview
    "FURB",    # refurb
    "PLC2801", # unnecessary-dunder-call
    "PLR1733", # unnecessary-dict-index-lookup
    "PLR1736", # unnecessary-list-index-lookup
    "PLR6201", # literal-membership
    "PLW1514", # unspecified-encoding
]
ignore = [
    "ANN401", # any-type
    "D100",   # undocumented-public-module
    "D101",   # undocumented-public-class
    "D102",   # undocumented-public-method
    "D103",   # undocumented-public-function
    "D104",   # undocumented-public-package
    "D105",   # undocumented-magic-method
    "D107",   # undocumented-public-init
    "D206",   # indent-with-spaces
    "D212",   # multi-line-summary-first-line ((D213) is the opposite of this)
    "D401",   # non-imperative-mood  
    "D413",   # missing-blank-line-after-last-section
    "E501",   # line-too-long (https://docs.astral.sh/ruff/formatter/#conflicting-lint-rules)
    "RUF012", # mutable-class-default
    "RUF052", # used-dummy-variable
    "SIM105", # suppressible-exception (https://github.com/vega/altair/pull/3431#discussion_r1629808660)
    "W505",   # doc-line-too-long
]
mccabe.max-complexity = 10
preview = true # https://docs.astral.sh/ruff/preview/
pydocstyle.convention = "numpy" # https://docs.astral.sh/ruff/settings/#lintpydocstyle
select = [
    "ANN",     # flake8-annotations
    "B",       # flake8-bugbear
    "C4",      # flake8-comprehensions
    "C901",    # complex-structure
    "D",       # pydocstyle
    "D213",    # multi-line-summary-second-line
    "E",       # pycodestyle-error
    "EM",      # flake8-errmsg
    "F",       # pyflakes
    "FA",      # flake8-future-annotations
    "FLY",     # flynt
    "I001",    # unsorted-imports
    "NPY",     # numpy-specific-rules
    "PIE",     # flake8-pie
    "PLC0208", # iteration-over-set
    "PLR0402", # manual-from-import
    "PLR1711", # useless-return
    "PLR1714", # repeated-equality-comparison
    "PLR5501", # collapsible-else-if
    "PLW0120", # useless-else-on-loop
    "PLW1510", # subprocess-run-without-check
    "PLW3301", # nested-min-max
    "PT",      # flake8-pytest-style
    "PTH",     # flake8-use-pathlib
    "RUF",     # Ruff-specific rules
    "SIM",     # flake8-simplify
    "TC",      # flake8-type-checking
    "TID",     # flake8-tidy-imports
    "UP",      # pyupgrade
    "W",       # pycodestyle-warning
]

[tool.ruff.lint.isort]
classes = ["datum", "expr"]
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
"narwhals.dependencies".msg = """
Import `dependencies` from `narwhals.stable.v1` instead.
"""
"narwhals.dtypes".msg = """
Import `dtypes` from `narwhals.stable.v1` instead.
"""
"narwhals.typing".msg = """
Import `typing` from `narwhals.stable.v1` instead.
"""
"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
"""

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

[tool.ruff.format]
docstring-code-format      = true # https://docs.astral.sh/ruff/formatter/#docstring-formatting
docstring-code-line-length = 88
line-ending                = "lf"

[tool.taskipy.settings]
cwd = "."

[tool.taskipy.tasks]
lint       = "ruff check"
format     = "ruff format --diff --check"
ruff-fix   = "task lint && ruff format"
type-check = "mypy altair tests"

pytest    = "pytest"
test      = "task lint && task format && task type-check && task pytest"
test-fast = "task ruff-fix && pytest -m \"not slow\""
test-slow = "task ruff-fix && pytest -m \"slow\""
test-min  = "task lint && task format && task type-check && hatch test --python 3.9"
test-all  = "task lint && task format && task type-check && hatch test --all"

generate-schema-wrapper = "mypy tools && python tools/generate_schema_wrapper.py && task test"
update-init-file        = "python tools/update_init_file.py && task ruff-fix"

doc-clean               = "python -c \"import tools;tools.fs.rm('doc/_build')\""
doc-clean-generated     = "python -c \"import tools;tools.fs.rm('doc/user_guide/generated', 'doc/gallery')\""
doc-clean-images        = "python -c \"import tools;tools.fs.rm('doc/_images')\""
doc-clean-all           = "task doc-clean && task doc-clean-generated && task doc-clean-images"
doc-mkdir               = "python -c \"import tools;tools.fs.mkdir('doc/_images')\""
doc-build-html          = "task doc-mkdir && sphinx-build -b html -d doc/_build/doctrees doc doc/_build/html"
doc-clean-build         = "task doc-clean-all && task doc-build-html"
doc-serve               = "python -m http.server --bind \"127.0.0.1\" --directory doc/_build/html 8000"
doc-publish             = "python tools/sync_website.py"
doc-publish-clean-build = "task doc-clean-build && task doc-publish"

clean   = "python -c \"import tools;tools.fs.rm('dist')\""
build   = "task clean && uv build"
publish = "task build && uv publish"

[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", "--doctest-modules", "tests", "altair", "tools"]
# 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.*",
    "scipy.*"
]
ignore_missing_imports = true
disable_error_code = ["import-untyped"]

[[tool.mypy.overrides]]
module = [
    "tests/examples_arguments_syntax.*",
    "tests/examples_methods_syntax.*",
]
disable_error_code = ["annotation-unchecked"]

[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
    "../../../**/typeshed*"                     # typeshed-fallback
]