python数据库查询返回类型默认是元组,改为返回字典类型
https://blog.csdn.net/weixin_44306005/article/details/107286219
操作数据库
https://www.cnblogs.com/huangtao1927/p/10274651.html
设置ping参数
https://blog.csdn.net/diuleilaomu/article/details/103278147