定义有参数装饰器为被装饰函数添加认证的功能：用户信息的来源可以是文件或者ldap，三次验证失败锁定用户。

def input_msg():    '''打印用户要输入的信息，    返回用户名、密码'''    username = input("username: ")    password = input("password: ")    return username, passworddef locked(username):    '''从user_times.db文件中查询用户名，    判断用户名是否已被锁定，    锁定返回False,没锁定返回True'''    flag_l = True    with open("user_times.db",mode="r",encoding="utf8") as file:        for i in file:            if username == i:                flag_l = False        if flag_l:            return flag_l        else:            return flag_lerror_name_dic = [] #存储用户名密码为错误的用户名的列表def instert(username):    '''将用户名密码初错误的用户名插入列表，    并判该用户名在列表中是否大于等于3次，    大于等于将该用户名追加入user_times.db'''    error_name_dic.append(username)    count = 0    for i in error_name_dic:        if i == username:            count += 1        if count >= 3:            with open("user_times.db", mode="a", encoding="utf8") as file:                file.write("\n")                file.write(username)def login(username, password):    '''从user.db中判断输入用户名、    密码是够正确，正确返回True,    不正确返回False'''    flag = False    error_name = ""    with open("user.db", mode="r", encoding="utf8") as file:        for i in file:            i = eval(i)            if username == i["username"] and password == str(i["password"]):                flag = True            if username == i["username"] and password != str(i["password"]):                error_name = username        if flag:            return flag, error_name        else:            return flag, error_namedef auth_out(auth_type):    '''带参数的装饰器，返回auth'''    def auth(func):        '''@auth 等于 index = auth(index) ,返回warpper'''        def warpper(*args, **kwargs):            '''index实现用户认证'''            if auth_type == "file":                while True:                    username,password = input_msg()                    flag_l = locked(username)                    if flag_l:                        flag, error_name = login(username, password)                        if flag:                            func(*args, **kwargs)                            return func                        else:                            instert(error_name)                            print("login error...")                    else:                        print("%s had been locked." % username)            elif auth_type == "ldap":                print("We don't have ldap.")        return warpper    return auth@auth_out(auth_type = "file")def index():    print("Welcome,this is index page.")index()