代码参考https://blog.csdn.net/DL11007/article/details/129204192?ops_request_misc=&request_id=&biz_id=102&utm_term=logistic%E6%A8%A1%E5%9E%8Bpython&utm_medium=distribute.pc_search_result.none-task-blog-2~all~sobaiduweb~default-1-129204192.142^v88^control_2,239^v2^insert_chatgpt&spm=1018.2226.3001.4187
df.loc[]和df.iloc[]：https://blog.csdn.net/weixin_48701352/article/details/120247544?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522168864051316800182741570%2522%252C%2522scm%2522%253A%252220140713.130102334..%2522%257D&request_id=168864051316800182741570&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~top_click~default-2-120247544-null-null.142^v88^control_2,239^v2^insert_chatgpt&utm_term=df.iloc&spm=1018.2226.3001.4187
后续报错：
ConvergenceWarning: lbfgs failed to converge (status=1): STOP: TOTAL NO. of ITERATIONS REACHED LIMIT
解决方法：增加迭代次数
参考：https://blog.csdn.net/qq_43391414/article/details/113144702