Python实战之实现简单的登陆系统-作业

#!usr/bin/env Python3
# -*-coding:utf-8-*-

#编写登陆接口

　　#输入用户名密码

　　#认证成功后显示欢迎信息

　　#输错三次后锁定

__author__="William"
#定义一个login类
class Login(object):
    count = 3
    Flag = 1
    wrong_user_flag = 1
    wrong_user = ''

　　#定义一个静态方法，用于主函数调用
    @staticmethod
    def login():
        while Login.count > 0:
            if Login.wrong_user_flag == 0:
                username = Login.wrong_user
            else:
                username = input("Please input your username:>>>")
                Login.wrong_user = username
            password = input("Please input your password:>>>")
            Login.verify(username,password)
            Login.count -= 1
        else:
            if Login.Flag != 1:
                with open("black_user.txt",'a') as fp:
                    fp.write("
")
                    fp.write(username)
                    fp.write("
")

    @staticmethod
    def verify(user_name,password):
        with open("black_user.txt", 'r') as fp:
            data = ''.join(fp.readlines()).split('
')
        if user_name in data:
            print("Your are locked")
            Login.count = 0
        else:
            if user_name == "William" and password =="123":
                print("Success,welcome to login")
                Login.Flag = 1
                Login.count = 0
            else:
                print("Wrong username or password")
                Login.Flag = 0
                Login.wrong_user_flag = 0
if __name__=='__main__':
    u1 = Login()
    u1.login()