Incorrect: type checkers will not prevent subclassing

What it does

Checks for calls to final() that type checkers cannot interpret.

Why is this bad?

The final() function is designed to be used as a decorator. When called directly as a function (e.g., final(type(...))), type checkers will not understand the application of final and will not prevent subclassing.

Example

from typing import final

# Incorrect: type checkers will not prevent subclassing
MyClass = final(type("MyClass", (), {}))  # error


# Correct: use `final` as a decorator
@final
class MyClass: ...