missing-type-function-argument (ANN001)

Derived from the flake8-annotations linter.

What it does

Checks that function arguments have type annotations.

Why is this bad?

Type annotations are a good way to document the types of function arguments. They also help catch bugs, when used alongside a type checker, by ensuring that the types of any provided arguments match expectation.

Example

def foo(x):
    ...

Use instead:

def foo(x: int):
    ...