作业1

# 编写登录接口
# 基础需求：
# 1. 让用户输入用户名密码
# 2. 认证成功后显示欢迎信息
# 3. 输错三次后退出程序

# 升级需求：
# 1. 可以支持多个用户登录（提示, 通过列表存多个账户信息）
# 2. 用户3次认证失败后，退出程序，再次启动程序尝试登录时，还是锁定状态（提示：需把用户锁定的状态存到文件里）

try_times = 0
list_username = [‘linda‘,‘emily‘,‘yu‘]
t_password = {‘linda‘: 123, ‘emily‘: 123, ‘yu‘: 123}

f = open(‘try.txt‘,‘r‘)
lock_file = f.read()
print("read file %s" % lock_file)
f.close()

username = input("could you enter your name?: ")
#
for i in range(1):
    if lock_file == username:
        print("your account is locked, could not login right now. ")
        exit()
    else:
        pass

while try_times < 3:

    password = int(input("please enter your password:"))

    if username in list_username[:] and password in t_password.values() :
        print("welcome %s to login!" % username)
        break
    elif username in list_username[:] and password not in  t_password.values() :
        print("password is not correct")
        try_times += 1

while try_times == 3 :
        print("sorry, try 3 times, locked your account.")
        f = open("try.txt",‘w‘)
        f.write(‘\n%s ‘ % username)
        break

作业1

原文：https://www.cnblogs.com/demilyc/p/9985228.html