while循环--登录

user = "fallen577"
password = ""
count = 0

while   count < 3:
    username = input("username：")
    userpwd = input("userpwd:")
    if  username == user and userpwd == password:
        msg = "嘿嘿，欢迎%s登录，还记得账号密码，不错！"%(user)
        print(msg)
        break
    else:
        num = 2 - count
        num1 = "输入错误哦，还有%s次机会哦！"%(num)
        print(num1)
    count += 1
else:

    err = "不要脸啊，%s次都错了，还想来！！！"%(count)
    print(err)

##可玩性优化
user = "fallen577"
password = ""
count = 0

while   count < 3:
    username = input("username：")
    userpwd = input("userpwd:")
    if  username == user and userpwd == password:
        msg = "嘿嘿，欢迎%s登录，还记得账号密码，不错！"%(user)
        print(msg)
        break
    else:
        num = 2 - count
        num1 = "输入错误哦，还有%s次机会哦！"%(num)
        print(num1)
    count += 1
    if count == 3:
        keep = int(input("还想玩不？，想玩输入1哦，请输入:"))
        if keep == 1:
            count = 0
        else:
            print("是你自己不玩的哦，bye！")