Flask 代码模式

某些东西非常通用,以至于你有很大的机会在绝大部分 Web 应用中,都能找到他们的身影。 For example quite a lot of applications are using relational databases and user authentication. In that case, chances are they will open a database connection at the beginning of the request and get the information of the currently logged in user. At the end of the request, the database connection is closed again.