基于itchat开发的正方教务助手，可自动识别教务验证码，查成绩，一键评教
'python Jwchat.py cmdQR'
/Jwchat/captcha/ ---验证码识别
识别验证码参考自iswin的 https://www.iswin.org/2016/10/15/Simple-CAPTCHA-Recognition-with-Machine-Learning/ 感谢littlecodersh的itchat https://github.com/littlecodersh/ItChat