code: def __init__(
      self,
  ):
      pass
  
imports: import numpy
  from collections import OrderedDict
  import nnabla
  import nnabla.functions
  from nnabla.function import PythonFunction
  from .backward_functions import registry
label_desc: Use image node_id 1 to create a new Grad object from inherited base classes: object with example: obj = Grad()