Python的self

https://www.cnblogs.com/jessonluo/p/4717140.html

http://c.biancheng.net/view/2266.html

https://www.cnblogs.com/wangjian941118/p/9360471.html

https://www.jianshu.com/p/153a377ee6a1

https://www.jianshu.com/p/f7fb9335f6be

https://blog.csdn.net/u012965373/article/details/95973584

https://blog.csdn.net/qq_35395612/article/details/90294513