A question about maddpg.py

[chengdusunny]

Hello,

I wanted to verify something I found in your code. In maddpg.py , there seems to be some problem with obs[None] in self.action. The error reported by the ide is :

return self.act(obs[None])[0]
TypeError: list indices must be integers or slices, not NoneType

So I write this issue to propose this problem.