函数闭包为函数加上认证功能

 

1.登陆账号

user_dic ={
   'username':None,'login':False}def auth_func(func):    def wrapper(*args,**kwargs):        if user_dic['username'] and user_dic['login']:            res = func(*args,**kwargs)            return res        username = input('账号:').strip()        passwd = input('密码:').strip()        if username == 'abcd' and passwd == '123456':            user_dic['username'] = username            user_dic['login'] = True            print('登陆成功！')            res=func(*args,**kwargs)            return res        else:            print('用户名或密码错误')    return wrapper@auth_funcdef index():    print('欢迎光临本网站')@auth_funcdef home(name):    print('欢迎%s回家' % name)index()home('小明')

运行结果：

账号:abcd密码:123456登陆成功！欢迎小明回家Process finished with exit code 0

 

2.检测已有账号登陆

 

user_list=[{
   'name':'abcd','passwd':'123456'},           {
    'name':'abd','passwd':'123'},           {
    'name':'acc','passwd':'123456'},           {
    'name':'asdfg','passwd':'12346'}]user_dac ={
   'username':None,'login':False}           # 获取刚开始登陆之前的状态def auth_func(func):    def wrapper(*args,**kwargs):        if user_dac['username'] and user_dac['login']:   # 获取刚开始登陆之前的状态，是否已登录            res = func(*args,**kwargs)            return res        username = input('账号:').strip()        passwd = input('密码:').strip()        for user_dic in user_list:            if username == user_dic['name'] and passwd == user_dic['passwd']:                user_dac['username'] = username                user_dac['login'] = True                print('登陆成功！')                res=func(*args,**kwargs)                return res        else:            print('用户名或密码错误')    return wrapper@auth_funcdef index():    print('欢迎光临本网站')@auth_funcdef home(name):    print('欢迎%s回家' % name)index()home('sb')

运行结果：

账号:abd密码:123登陆成功！欢迎光临本网站欢迎sb回家Process finished with exit code 0