code: def __init__(self):
      self._memo = set()
  
imports: import re
  from collections import OrderedDict
  from functools import wraps
  import nnabla
  from nnabla.core.graph_def import module_scope, current_graph_builder
label_desc: Use image node_id 1 to create a new ParamMemo object from inherited base classes: object with example: obj = ParamMemo()