code: def reset(self, **kwargs):
      obs = self.env.reset(**kwargs)
      for _ in range(self.n_frames):
          self.frames.append(obs)
      return self._get_ob()
  
imports: from collections import deque
  import numpy
  import gym
  from gym import spaces
  import cv2
label_desc: Use image node_id 2 for calling the FrameStack obj's underlying member method code with example usage: obj.reset() and returns: self