code: def is_callable_type(tp):
      
      if NEW_TYPING:
          return (tp is Callable or isinstance(tp, _GenericAlias) and
                  tp.__origin__ is collections.abc.Callable or
                  isinstance(tp, type) and issubclass(tp, Generic) and
                  issubclass(tp, collections.abc.Callable))
      return type(tp) is CallableMeta
docs: Test if the type is a generic callable type, including subclasses
      excluding non-generic types and callables.
      Examples::
  
          is_callable_type(int) == False
          is_callable_type(type) == False
          is_callable_type(Callable) == True
          is_callable_type(Callable[..., int]) == True
          is_callable_type(Callable[[int, int], Iterable[str]]) == True
          class MyClass(Callable[[int], int]):
              ...
          is_callable_type(MyClass) == True
  
      For more general tests use callable(), for more precise test
      (excluding subclasses) use::
  
          get_origin(tp) is collections.abc.Callable  # Callable prior to Python 3.7