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