code: def reset(self):
      
      self._frame_counter = 0
      ob_real = self.real_env.reset()
      # Initialize simulated environment with frames from real one.
      self.sim_env.add_to_initial_stack(ob_real)
      for _ in range(3):
        ob_real, _, _, _ = self.real_env.step(self.name_to_action_num["NOOP"])
        self.sim_env.add_to_initial_stack(ob_real)
      ob_sim = self.sim_env.reset()
      assert np.all(ob_real == ob_sim)
      self._last_step_tuples = self._pack_step_tuples((ob_real, 0, False, {}),
                                                      (ob_sim, 0, False, {}))
      self.set_zero_cumulative_rewards()
      ob, _, _, _ = self._player_step_tuple(self._last_step_tuples)
      return ob
docs: Reset simulated and real environments.