code: def observation(self, observation):
      # careful! This undoes the memory optimization, use
      # with smaller replay buffers only.
      return np.array(observation).astype(np.float32) / 255.0
  
imports: import numpy
  import os
  from collections import deque
  import gym
  from gym import spaces
  import cv2
  from .wrappers import TimeLimit
label_desc: Use image node_id 2 for calling the ScaledFloatFrame obj's underlying member method code with example usage: obj.observation(observation) and returns: unknown