A3C_continues.py

[Gjunze]

'Viewer' object has no attribute 'isopen'
File "E:\anaconda\envs\tf2\lib\site-packages\gym\envs\classic_control\rendering.py", line 81, in close
AttributeError: 'Viewer' object has no attribute 'isopen'
Traceback (most recent call last):
File "E:\anaconda\envs\tf2\lib\site-packages\gym\envs\classic_control\rendering.py", line 165, in del
if self.isopen and sys.meta_path:
if self.isopen and sys.meta_path:
if self.isopen and sys.meta_path:
self.close()
File "E:\anaconda\envs\tf2\lib\site-packages\gym\envs\classic_control\rendering.py", line 165, in del
if self.isopen and sys.meta_path:
AttributeError: 'Viewer' object has no attribute 'isopen'
AttributeError: 'Viewer' object has no attribute 'isopen'
self.close()
File "E:\anaconda\envs\tf2\lib\site-packages\gym\envs\classic_control\rendering.py", line 81, in close
AttributeError: 'Viewer' object has no attribute 'isopen'
AttributeError: 'Viewer' object has no attribute 'isopen'
if self.isopen and sys.meta_path:
File "E:\anaconda\envs\tf2\lib\site-packages\gym\envs\classic_control\rendering.py", line 81, in close
AttributeError: 'Viewer' object has no attribute 'isopen'
if self.isopen and sys.meta_path:
AttributeError: 'Viewer' object has no attribute 'isopen'

l don't konw how to fix it