关于A2C算法

https://github.com/sweetice/Deep-reinforcement-learning-with-pytorch/blob/master/Char4%20A2C/A2C.py

另外这个里面有a2c，a3c的区别的示意图

https://github.com/MG2033/A2C

http://www.dataguru.cn/article-14078-1.html