Function get_args

Lib/typing.py:2582–2605

Get type arguments with all substitutions performed. For unions, basic simplifications used by Union constructor are performed. Examples:: >>> T = TypeVar('T') >>> assert get_args(Dict[str, int]) == (str, int) >>> assert get_args(int) == () >>> assert get_a

(tp)

def get_args(tp):
    """Get type arguments with all substitutions performed.

    For unions, basic simplifications used by Union constructor are performed.

    Examples::

        >>> T = TypeVar('T')
        >>> assert get_args(Dict[str, int]) == (str, int)
        >>> assert get_args(int) == ()
        >>> assert get_args(Union[int, Union[T, int], str][int]) == (int, str)
        >>> assert get_args(Union[int, Tuple[T, int]][str]) == (int, Tuple[str, int])
        >>> assert get_args(Callable[[], T][int]) == ([], int)
    """
    if isinstance(tp, _AnnotatedAlias):
        return (tp.__origin__,) + tp.__metadata__
    if isinstance(tp, (_GenericAlias, GenericAlias)):
        res = tp.__args__
        if _should_unflatten_callable_args(tp, res):
            res = (list(res[:-1]), res[-1])
        return res
    if isinstance(tp, Union):
        return tp.__args__
    return ()


def is_typeddict(tp):