flask框架

项目结构

第一个Flask程序

from flask import Flask

app = Flask(__name__)


@app.route('/')
def hello_world():
    return 'Hello World!'


if __name__ == '__main__':
    app.run()

加载配置文件

from flask import Flask
import config

app = Flask(__name__)
app.config.from_object(config)


@app.route('/')
def hello_world():
    return {
        'name': '逍遥子',
        'age': 18
    }


if __name__ == '__main__':
    app.run()

参数传递

方式一

@app.route("/user/<uid>")
def user_info(uid):
    return "当前用户是:" + uid

方式二

from flask import request

@app.route("/user")
def user_info():
    uid = request.args.get("uid")
    return "当前用户是:" + uid

请求方式

指定请求方式

@app.route("/user", methods=["GET"])
def user_info():
    uid = request.args.get("uid")
    return "当前用户是:" + uid

url_for

视图函数与url之间的映射

@app.route("/user")
def user_info():
    uid = request.args.get("uid")
    print(url_for("user_info"))  # /user
    return "当前用户是:" + uid

重定向

永久性重定向：状态码301

临时性重定向：状态码302

from flask import Flask, request, url_for, redirect

@app.route('/')
def hello_world():
    return 'Hello World!'


@app.route("/user")
def user_info():
    # 跳转到首页
    return redirect(url_for("hello_world"))