code: def __call__(self, num1: Generator, num2: Generator):
      sum1 = sum(num1)
      sum2 = sum(num2)
      return sum1, sum2
  
imports: from typing import Generator
  from towhee.operator import PyOperator, SharedType
label_desc: Use image node_id 1 for calling the SumOperator obj's underlying member method code with example usage: obj.__call__(num1, num2) and returns: sum1,  sum2