运行了py文件，发现有了这个错误。

File "/home/zzz/guyueclass-main/machine_learning/deep_reinforcement_learning_grasping/drlgrasp/drlgrasp/pybullet_envs/kuka_reach_with_visual.py", line 400, in <module>
    env = CustomSkipFrame(env)
  File "/home/zzz/guyueclass-main/machine_learning/deep_reinforcement_learning_grasping/drlgrasp/drlgrasp/pybullet_envs/kuka_reach_with_visual.py", line 370, in __init__
    shape=(skip, self.kImageSize['width'], self.kImageSize['height']))
AttributeError: 'CustomSkipFrame' object has no attribute 'kImageSize'

CustomSkipFrame类应该已经继承了kImageSize属性了啊，为什么还是显示没有呢，这个源码应该和视频里的一样。