quoted-annotation-in-stub (PYI020)

Derived from the flake8-pyi linter.

Fix is always available.

What it does

Checks for quoted type annotations in stub (.pyi) files, which should be avoided.

Why is this bad?

Stub files are evaluated using annotations semantics, as if from __future__ import annotations were included in the file. As such, quotes are never required for type annotations in stub files, and should be omitted.

Example

def function() -> "int":
    ...

Use instead:

def function() -> int:
    ...