class_docstr: Operator base class, implements __init__ and __call__,
  
  Examples:
      class AddOperator(Operator):
          def __init__(self, factor: int):
              self._factor = factor
  
          def __call__(self, num)
              return self._factor + num
class_docstr_tok: ["Operator","base","class",",","implements","__init__","and","__call__",",","Examples",":","class","AddOperator","(","Operator",")",":","def","__init__","(","self",",","factor",":","int",")",":","self._factor","=","factor","def","__call__","(","self",",","num",")","return","self._factor","+","num"]
code: def key(self, value):
      self._key = value
  
imports: from abc import abstractmethod, ABC
  from enum import Enum
  from enum import Flag, auto
label_desc: Use image node_id 5 for calling the Operator obj's underlying member method code with example usage: obj.key(value) without return types