http://note.youdao.com/noteshare?id=0da3377adf64a0b4291fc541ca003de3&sub=B4DB8BE2E3B04CAF89D9D5500B4BA904
http://note.youdao.com/noteshare?id=81868db8036cf3fde3c1a6dd56422ba2&sub=D8F3077B86F3490496445278C0FD3C1F
http://note.youdao.com/noteshare?id=69dd509426134452c9372534339f5a49&sub=25BE3BBEB8914030AFAD52DD2E3A65F9
http://note.youdao.com/noteshare?id=a1e8be40b73b745a00f9fbd55c854c83&sub=927095F724064650B4F6A48A253A7B46
http://note.youdao.com/noteshare?id=2f66158ad85345e3f6f965886558528a&sub=B81F947745BB434A8B5C889FD8C0EECD
http://note.youdao.com/noteshare?id=abc8a92b5852f2963ae8a5d45fda1159python
原文：https://www.cnblogs.com/liubeibei/p/10705276.html
