实现的功能:
1、输入用户名密码
2、认证成功后显示欢迎信息
3、输错三次后锁定
username = "abc" password = "123" username_input = input("username:") if username_input == username: for i in range(4): if i == 3: print("{_username}".format(_username = username_input) + " was locked.") break password_input = input("password:") if password_input == password: print("Welcome to {_username}".format(_username = username_input) + "'s blog!!!") break else: print("Password error, please input again!") continue else: print("User {_userNotExist}".format(_userNotExist=username_input) + " is not exist.")