(self, parameters)
Special marker indicating that an assignment should
    be recognized as a proper type alias definition by type
    checkers.

    For example::

        Predicate: TypeAlias = Callable[..., bool]

    It's invalid when used anywhere except as in the example above.
Special marker indicating that an assignment should
    be recognized as a proper type alias definition by type
    checkers.
Special marker indicating that an assignment should be recognized as a proper type alias definition by type checkers .
def TypeAlias(self, parameters):
    """Special marker indicating that an assignment should
    be recognized as a proper type alias definition by type
    checkers.

    For example::

        Predicate: TypeAlias = Callable[..., bool]

    It's invalid when used anywhere except as in the example above.
    """
    raise TypeError(f"{self} is not subscriptable")
def TypeAlias ( self , parameters ) : raise TypeError ( f"{self} is not subscriptable" )