code: def _initialize_simulation(self):
      self.model = mujoco_py.load_model_from_path(self.fullpath)
      self.sim = mujoco_py.MjSim(self.model)
      self.data = self.sim.data
  
imports: from os import path
  from typing import Optional, Union
  import numpy
  import gym
  from gym import error, logger, spaces
  from gym.spaces import Space
label_desc: Use image node_id 2 for calling the MuJocoPyEnv obj's underlying member method code with example usage: obj._initialize_simulation() without return types