ImportError: sys.meta_path is None, Python is likely shutting down 解决方案

import gym

env = gym.make('CartPole-v0')
env.reset()
env.render()

 

一段简单的代码运行后，游戏界面秒闪后关闭，然后报错如下

 

Exception ignored in: <function Viewer.__del__ at 0x000002460FDBF950>
Traceback (most recent call last):
  File "D:\Destina\Anaconda\envs\lib\site-packages\gym\envs\classic_control\rendering.py", line 152, in __del__
  File "D:\Destina\Anaconda\envs\lib\site-packages\gym\envs\classic_control\rendering.py", line 71, in close
  File "D:\Destina\Anaconda\envs\lib\site-packages\pyglet\window\win32\__init__.py", line 305, in close
  File "D:\Destina\Anaconda\envs\lib\site-packages\pyglet\window\__init__.py", line 770, in close
ImportError: sys.meta_path is None, Python is likely shutting down

 

网上很多方法，卸了下载的看着很烦，但其实只需要加一句话就可以解决

如下

env.close()

之后还是会秒闪，但是不会报错，如果想让游戏界面保留时间长一点可以使用如下代码：

import gym
import time

env = gym.make('CartPole-v0')
env.reset()
env.render()
time.sleep(5)
env.close()