Python type hint for classes that support __getitem__

Question

I want to add type hints to a function that will accept any object with a __getitem__ method. For instance, in

def my_function(hasitems, locator         


        

Answer 1

This will work for dict and list, but not for any generic type:

from typing import Any, Mapping, Sequence, Union

def my_function(hasitems: Union[Mapping, Sequence], locator: Any) -> Any:
    return hasitems[locator]