Flask Installation

Package      Version ------------ ------- click        6.7    Flask        0.12.2 itsdangerous 0.24   Jinja2       2.10   MarkupSafe   1.0 Werkzeug     0.14.1

beans.py

# -*- coding: utf-8 -*-class Student(object):    from functools import singledispatch    @singledispatch    def fun(arg, verbose = False):        if verbose:            print("please let me say: ", end='')        print(arg)    @fun.register(int)    def _(arg, verbose=False):    @property    def scorexx(self):        return self._scorex    @scorexx.setter    def scorexx(self, value):        if not isinstance(value, int):            raise ValueError('scorexx must be an integer.')        if value<0 or value>100:            raise ValueError('value must between 0 and 100.')        self._scorex = valueif __name__ == '__main__':    stu = Student()    stu.scorexx = 100    stu.scorexx = 101    print(stu.scorexx)

　　webapp.py

1 # -*- coding: utf-8 -*- 2 from flask import Flask 3 import json 4  5 app = Flask(__name__) 6  7  8 @app.route('/') 9 def hello_world():10     ml = ['Hello Flask Workd', '你好，Flask世界！']11     print(ml)12     print(type(ml))13     print(type(str(ml)))14     return str(json.dump(ml[0]))15 16 17 if __name__ == '__main__':18     app.run()