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missing-type-self (ANN101)#

Derived from the flake8-annotations linter.

What it does#

Checks that instance method self 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.

Note that many type checkers will infer the type of self automatically, so this annotation is not strictly necessary.


class Foo:
    def bar(self):

Use instead:

class Foo:
    def bar(self: "Foo"):