code: def backup(self, value):
      current = self
      while current.parent is not None:
          current.number_visits += 1
          current.total_value += value
          current = current.parent
  
imports: import collections
  import math
  import numpy
label_desc: Use image node_id 12 for calling the Node obj's underlying member method code with example usage: obj.backup(value) without return types