python+pandas后遇到的问题（坑）

1、如何紧接着excel一个文件往后写

https://www.crifan.com/python_append_new_data_into_existing_excel_xls_file/

2、pandas API

http://pandas.pydata.org/pandas-docs/stable/api.html

3、

def __str__(self):
    return "username:" + self.__username + "," + "password" + self.__password#!!!!!!!!!!!!!!这个函数是给print对象用的 

4、Python继承

https://www.cnblogs.com/MrFiona/p/6423271.html

5、如何在Python下打开命令行

https://jingyan.baidu.com/article/6fb756ec71f73e241858fb2b.html

6、如何在命令行新建Django

https://www.baidu.com/link?url=PAfeYq4Db0EXRhKOwjcFPYYu03I8hmHGGUfLIWGnhC-OTvLpWzr0gHIlZxnD-aNuVf208LA_Tm8N3qtFdhssBkQ78J_iKKYDU1edNnSTeq3&wd=&eqid=ffcebbb800056251000000025ad2eecc

7、为什么无法导入excel

https://www.cnblogs.com/PeterZhang1520389703/p/8242424.html