code: def step(self, ac):
      self.ac_count += 1
      ob, rew, done, info = self.env.step(ac)
      return self._process(ob), rew, done, info
  
imports: from collections import deque
  import cv2
  from .atari_wrappers import WarpFrame, ClipRewardEnv, FrameStack, ScaledFloatFrame
  from .wrappers import TimeLimit
  import numpy
  import gym
label_desc: Use image node_id 2 for calling the AppendTimeout obj's underlying member method code with example usage: obj.step(ac) and returns: self,  rew,  done,  info