pyproject.toml

[tool.ruff]
# Enable Pyflakes `E` and `F` codes by default.
select = ["C4", "E", "F"]

# Ignore rules that currently fail on the SymPy codebase
ignore = [
    "E401",  # Multiple imports on one line
    "E402",  # Module level import not at top of file
    "E501",  # Line too long (<LENGTH> > 88 characters)
    "E701",  # Multiple statements on one line (colon)
    "E702",  # Multiple statements on one line (semicolon)
    "E703",  # Statement ends with an unnecessary semicolon
    "E711",  # Comparison to `None` should be `cond is not None`
    "E712",  # Comparison to `<BOOL>` should be `cond is <BOOL>`
    "E713",  # Test for membership should be `not in`
    "E714",  # Test for object identity should be `is not`
    "E721",  # Do not compare types, use `isinstance()`
    "E722",  # Do not use bare `except`
    "E731",  # Do not assign a `lambda` expression, use a `def`
    "E741",  # Ambiguous variable name: `<VARIABLE>`
    "E743",  # Ambiguous function name: `<FUNCTION>`
    "F401",  # `<TYPE>` imported but unused
    "F403",  # `from <MODULE> import *` used; unable to detect undefined names
    "F405",  # `<TYPE>` may be undefined, or defined from star imports: `<MODULE>`
    "F523",  # `.format` call has unused arguments at position(s): <INDEX>
    "F601",  # Dictionary key literal `'<KEY>'` repeated
    "F811",  # Redefinition of unused `<VARIABLE>` from line <LINE>
    "F821",  # Undefined name `VARIABLE`
    "F823",  # Local variable `VARIABLE` referenced before assignment
    "F841",  # Local variable `VARIABLE` is assigned to but never used
]

# Exclude paths currently excluded in the flake8 configuration
exclude = [
    "sympy/assumptions/*generated.py",
    "sympy/core/*_generated.py",
    "sympy/parsing/latex/_antlr/*",
    "sympy/parsing/autolev/_antlr/*",
    "sympy/parsing/autolev/test-examples/*",
    "sympy/integrals/rubi/*",
]

# Black default, although irrelevant with E501 ignored
line-length = 88

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

# Per-file ignores currently specified in the flake8 configuration
[tool.ruff.per-file-ignores]
"sympy/interactive/session.py" = ["F821"]