File: _get_args.py

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import typing


def get_args(t: type) -> typing.Tuple[type, ...]:
    """
    Get the arguments from a collection type (e.g. ``typing.List[int]``) as a
    ``tuple``.
    :param t: the collection type.
    :return: a ``tuple`` containing types.
    """
    args_ = getattr(t, '__args__', tuple())
    if not args_:
        args_= tuple()
    elif not isinstance(args_,tuple):
        args_ = (args_,)
    args = tuple([attr for attr in args_
                  if type(attr) != typing.TypeVar])
    return args