code: def __init__(self, env):
      contactListener.__init__(self)
      self.env = env
  
imports: import math
  from typing import TYPE_CHECKING, List, Optional
  import numpy
  import gym
  from gym import error, spaces
  from gym.error import DependencyNotInstalled
  from gym.utils import EzPickle
label_desc: Use image node_id 1 to create a new ContactDetector object from inherited base classes: contactListener with example: obj = ContactDetector(env)