python3基础09（装饰器的使用）

#!/usr/bin/env python
# -*- coding:utf-8 -*-

import time

#方式1
class People:

    def __init__(self, name, age):
        self.__name = name
        self.__age = age

    def get_age1(self):
        return self.__age

    def set_age2(self, age):
        if isinstance(age, int):
            self.__age = age
        else:
            raise ValueError

    def del_age3(self):
        print("删除年龄数据！")

    # 核心在这句
    age1 = property(get_age1, set_age2, del_age3, "年龄")

obj = People("jack", 18)
print(obj.age1)
obj.age = 19
print("obj.age:  ", obj.age)
del obj.age

#方式2
def deco(f):
    def wrapper():
        start_time = time.time()
        f()
        end_time = time.time()
        execution_time = (end_time - start_time)*1000
        print("time is %d ms" %execution_time )
    return wrapper

@deco
def f():
    print("hello")
    time.sleep(1)
    print("world")

if __name__ == '__main__':
    f()