code: def __init__(self, factor):
      self.factor = factor
  
imports: import unittest
  from towhee.operator.nop import NOPNodeOperator
  from towhee.operator import PyOperator
  from towhee.runtime.pipeline import Pipeline
  from towhee.runtime.data_queue import Empty
  from towhee.runtime import ops, register
  from towhee.runtime.runtime_pipeline import RuntimePipeline
label_desc: Use image node_id 1 to create a new AddOperator object from inherited base classes: PyOperator with example: obj = AddOperator(factor)