如何在sqlalchemy中完全删除数据库连接?在任何地方为python提供max_user_limit

I am hosting a flask application on Pythonanywhere. Where I have to make few queries from the database. While using MySQLdb I am able to close all the connection to database and don't get any error. But while using sqlalchemy some how connections to the database do not get closed.I am hosting a flask application on Pythonanywh