Module « typing » Python 3.11.3

Fonction Never - module typing

Signature de la fonction Never

def Never(*args, **kwds) 

Description

help(typing.Never)

The bottom type, a type that has no members.

    This can be used to define a function that should never be
    called, or a function that never returns::

        from typing import Never

        def never_call_me(arg: Never) -> None:
            pass

        def int_or_str(arg: int | str) -> None:
            never_call_me(arg)  # type checker error
            match arg:
                case int():
                    print("It's an int")
                case str():
                    print("It's a str")
                case _:
                    never_call_me(arg)  # ok, arg is of type Never