code: def __init__(self, env):
      self.parent = None
      self.child_total_value = collections.defaultdict(float)
      self.child_number_visits = collections.defaultdict(float)
      self.env = env
  
imports: import collections
  import math
  import numpy
label_desc: Use image node_id 1 to create a new RootParentNode object  with example: obj = RootParentNode(env)