class_docstr: Stateful operator
code: def __call__(self, num: int) -> Tuple[int, int]:
      return self._factor + num, self._factor + num
  
imports: from typing import Tuple
  from towhee.operator import PyOperator, SharedType
label_desc: Use image node_id 2 for calling the Op obj's underlying member method code with example usage: obj.__call__(num) and returns: unknown,  unknown