#用户登录题，三次未对失败，三次登录相同用户，并出错，锁定用户。

f = open("text.txt","r")
user_pass = {}
for line in f:
    u,p = line.split(',')
    user_pass[u] = p.strip()

f = open("lock_a.txt","r")
data = f.read()



count = 0
lock_a = None
sign = True
while count < 3:
    user_n = input(">:")
    if user_n in data:
        print("已被锁定。")
        exit()
    pass_w = input(">>:")
    if count == 0:
        lock_a = user_n

    if lock_a != user_n:
        sign = False
    if user_n in user_pass:
        if user_pass[user_n] == pass_w:
            print("欢迎登录")
            break
        else:
            print("抱歉，账号或者密码错误")
    else:
        print("没有这个用户")
    count += 1

else:
    print("次数太多")
    if sign == True:
        print("锁定")
        f = open("lock_a.txt","a")
        f.write("%s\n"%user_n)
        f.close()