My Ruff configuration

ruff.toml

cache-dir = "~/.cache/ruff"
# Exclude a variety of commonly ignored directories.
exclude = [
    ".bzr",
    ".direnv",
    ".eggs",
    ".git",
    ".git-rewrite",
    ".hg",
    ".mypy_cache",
    ".nox",
    ".pants.d",
    ".pytype",
    ".ruff_cache",
    ".svn",
    ".tox",
    ".venv",
    ".vscode",
    "__pypackages__",
    "_build",
    "buck-out",
    "build",
    "dist",
    "node_modules",
    "venv",
    ".env",
    "vendor",
    "site-packages",
]

src = ["src", "test", "app"]
# Same as Black.
line-length = 120
indent-width = 4

# Assume Python 3.8
target-version = "py311"

include = ["*.py"]
extend-include = ["*.ipynb"]
ignore-init-module-imports = true

select = ["E4", "E7", "E9", "F", "B", "Q"]

[lint]
# Enable Pyflakes (`F`) and a subset of the pycodestyle (`E`)  codes by default.

ignore = ["E501", "F401", "F841", "D417", "SIM108", "UP009"]
extend-select = [
  # pycodestyle
  "E",
  # Pyflakes
  "F",
  # pyupgrade
  "UP",
  # flake8-bugbear
  "B",
  # flake8-simplify
  "SIM",
  # isort
  "I",
]

extend-safe-fixes = ["F601"]
extend-unsafe-fixes = ["UP034"]

# Allow fix for all enabled rules (when `--fix`) is provided.
fixable = ["ALL"]
unfixable = ["B", "F401"]

# Allow unused variables when underscore-prefixed.
dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"

[lint.per-file-ignores]
"__init__.py" = ["E402"]
"**/{tests,docs,tools,dist}/*" = ["E402"]

[format]
# Like Black, use double quotes for strings.
quote-style = "double"
indent-style = "space"
# Like Black, respect magic trailing commas.
skip-magic-trailing-comma = false

# Like Black, automatically detect the appropriate line ending.
line-ending = "auto"

[isort]
order-by-type = true
known-local-folder = ["src"]
force-wrap-aliases = true
case-sensitive = true
combine-as-imports = true
single-line-exclusions = ["os", "json"]

[pep8-naming]
# Allow Pydantic's `@validator` decorator to trigger class method treatment.
classmethod-decorators = ["pydantic.validator"]
# extend-ignore-names = ["callMethod"]

[flake8-annotations]
allow-star-arg-any = true
# ignore-fully-untyped = true
mypy-init-return = true
suppress-dummy-args = true
suppress-none-returning = true

[flake8-bandit]
check-typed-exception = false

[flake8-bugbear]
# Allow default arguments like, e.g., `data: List[str] = fastapi.Query(None)`.
extend-immutable-calls = ["fastapi.Depends", "fastapi.Query"]