【sqlalchemy】

https://www.liaoxuefeng.com/wiki/897692888725344/955081460091040

https://www.jianshu.com/p/637ede0939d1

https://www.cnblogs.com/xushuhai/p/9101295.html

https://blog.csdn.net/u012206617/article/details/94571685

 

https://www.jianshu.com/p/9771b0a3e589/

 

https://docs.sqlalchemy.org/en/13/orm/tutorial.html#building-a-relationship