我尝试构建简单的烧瓶应用程序。我希望在数据库中商店服务器的会话fromflaskimportFlaskfromflask_migrateimportMigrate,MigrateCommandfromflask_scriptimportManagerfromflask_sessionimportSessionfromflask_sqlalchemyimportSQLAlchemyapp=Flask(__name__)app.config['SQLALCHEMY_DATABASE_URI']='sqlite://'app.config['SESSION_TYPE']='sqlalchemy'db