Python Flask 框架快速搭建 RESTful API

安装与基础结构

pip install flask flask-restful

from flask import Flask

from flask_restful import Resource, Api



app = Flask(__name__)

api = Api(app)



class HelloWorld(Resource):

    def get(self):

        return {"message": "Hello, World!"}



api.add_resource(HelloWorld, '/')



if __name__ == '__main__':

    app.run(debug=True)

带参数的路由

class UserAPI(Resource):

    def get(self, user_id):

        return {"user_id": user_id, "name": f"User{user_id}"}



    def put(self, user_id):

        # 更新用户

        return {"status": "updated"}



api.add_resource(UserAPI, '/user/<int:user_id>')

请求解析

from flask_restful import reqparse



parser = reqparse.RequestParser()

parser.add_argument('name', type=str, required=True, help='Name is required')

parser.add_argument('age', type=int)



class CreateUser(Resource):

    def post(self):

        args = parser.parse_args()

        return {"name": args['name'], "age": args.get('age')}

错误处理

from flask_restful import abort



def get_user(user_id):

    if user_id > 100:

        abort(404, message="User not found")

    return {"id": user_id}

Flask RESTful 轻量且易用，适合快速构建微服务。