python 3.0 模拟用户登录功能并实现三次错误锁定

# -*- coding:utf-8 -*-#需求模拟用户登录，超过三次错误锁定不允许登陆count = 0#realname passwdReal_Username = "test"Real_Password = "test"#读取黑名单的内容f = open('black_user','r')lock_file = f.read()f.close()Username = input('请输入用户名:')#判断输入用户是否在黑名单内，如果在则不允许输入密码for i in range(1):  if lock_file == Username:    print('对不起，您的用户已锁定，暂时不允许使用！')    exit()  else:    continue#尝试输入密码并对输入次数进行计数for i in range(3):  Password = input("请输入密码:")  if Username == Real_Username and Password == Real_Password:    print("登录成功")    break  else:    print("登录失败")  count += 1#如果输入三次错误密码，则提示用户名锁定，并将用户名拉黑if count == 3:  print("对不起，您输入的密码错误次数已经达到3次，您的用户名将被锁定")  f = open("black_user","w")  f.write("%s"%Username)  f.close()