将资源/模型导入移动到分配
db变量的下面（因为这些模块/脚本依赖于已经实例化的数据库）：
myapi / api / init.py
from flask import Flaskfrom flask.ext.restful import Apifrom flask.ext.sqlalchemy import SQLAlchemyapp = Flask(__name__)app.debug = Trueapp.config['SQLALCHEMY_DATAbase_URI'] = 'postgresql://localhost/myapi'api = Api(app)db = SQLAlchemy(app)from api.resources.user import Userapi.add_resource(User, '/user')
