实现用户登录并且输入错误三次后锁定该用户

real_user = ‘channel‘    #正确的用户名
real_passwd = ‘asdf‘    #正确的密码

lock_user = [‘tiaozhan‘] #锁定账号列表

while True:
    user_input = input("输入用户名")
    passwd_input = input(‘your passwd:‘)
    if user_input in lock_user:
        print(‘用户 %s 被锁定‘ %user_input)

    elif user_input == real_user:
        i = 0
        while i <3:
        # for i in range(3):
            # passwd_input = input("your password:")
            if passwd_input == real_passwd:
                print(‘yes, you got it‘)
                break
                exit()
            else:
                print("passwd is False")
                if i==2:
                    print("the user has been locked")
                    lock_user.append(user_input)
                    exit()
                else:
                    passwd_input = input("your passwd again:")
            i +=1
    else:
        print("用户不存在")