当我尝试从Flask应用程序连接到本地主机上现有的空PostgreSQL数据库时,收到"AttributeError:‘drivername’对象没有‘drivername’属性“。SQLALCHEMY_DATABASE_URI='postgresql+psycopg2://postgres:PASSWORD@localhost/DATABASE'
...' object has
2020-07-12T03:19:13.340264+00:00 app[web.1]: return connector.get_engine()2020-07-12T03init__.py", line 883, in apply_driver_hacks
2020-07-12T03:19:13.34026