MySql Order By Group SELECT course_id, student_name, score, ROW_NUMBER() OVER (PARTITION BY course_id ORDER BY score DESC) AS row_num
Summarylinear_modellinear reggression model for predict data or fit some model.（多元）线性回归用于拟合数据，预测数据。logistic regression model for identification to cla
Django create projectdjango-admin startproject YourProjectNameDjango create apppython manage.py startapp YourAppNameDjango above modelsfrom django.db
目录LEGB规则global表达式属性引用与名字引用属性空间小结LEGB规则从Python2.2开始，由于引入了嵌套函数，所以最好的方式应该是内层函数找不到某个变量时先去外层函数找，而不是直接就跑到global空间里面找。
