python3.7 mysql报错解决方法TypeError: selectSQL() missing 1 required positional argument: 'self'
报错一:raiseerr.InterfaceError("(0,'')")pymysql.err.InterfaceError:(0,'')数据库打开后直接关闭了,执行sql查询时报错,解决方法:借鉴同学:https://blog.csdn.net/lluozh2015/article/details/78411884报错二:TypeError:selectSQL()missing1require