day 11 - 2 装饰器练习

FLAG = False
def login(func):
    def inner(*args,**kwargs):
        global FLAG
        if FLAG:
            ret = func(*args,**kwargs)
            return ret
        else:
            #登录程序
            username = input(\'请输入用户名：\')
            password = input(\'请输入密码：\')
            if username == \'ysg\' and password == \"275\":
                FLAG = True
                ret = func(*args,**kwargs)
                return ret
            else:
                print(\"登录失败\")
    return inner

@login
def shoplist_add():
    print(\"向购物车中添加物品\")

@login
def shoplist_del():
    print(\"向购物车中添加物品\")


shoplist_add()
shoplist_del()

def log(func):
    def inner(*arge,**kwargs):
        with open(\'E:/py/log/log.txt\',\'a\',encoding=\'utf-8\') as f:
            f.write(func.__name__ + \'\\n\')
        ret = func(*arge,**kwargs)
        print(\"\")
        return ret
    return inner

@log
def shoplist_add():
    print(\"购买了一件商品\")

@log
def shoplist_del():
    print(\"删除了一件商品\")

shoplist_add()
shoplist_del()
shoplist_add()
shoplist_del()
shoplist_add()
shoplist_del()

import os
from urllib.request import urlopen
def cache(func):
    def inner(*arge,**kwargs):
        if os.path.getsize(\'E:/py/log/url.txt\'):
            with open (\"E:/py/log/url.txt\",\"rb\") as f:
                return f.read()
        ret = func(*arge,**kwargs)
        with open(\'E:/py/log/url.txt\',\'wb\') as f:
            f.write(ret+b\"*****\")
        return ret
    return inner

@cache
def get(url):
    code = urlopen(url).read()
    return code

ret = get(\'http://www.baidu.com\')
print(ret)

ret = get(\'http://www.baidu.com\')
print(ret)