i=3
username = "python"
userpassword = "123456"
while True:
    i-=1
    if i>=0:
        name = input("请输入用户名:")
        password = input("请输入密码:")
        if name == username and password == userpassword:
            print("登录成功!")
            break
        if name!=username:
            print("用户名错误!请重新输入")
            print("提示:你还有"+str(i)+"次机会")
            continue
            
        if password!=userpassword:
            print("密码错误!请重新输入")
            print("提示:你还有"+str(i)+"次机会")
    else:
        print("你这个笨蛋，密码都记不住，带身份证来解锁！！！") 
        exit()   
print("欢迎来到希玛编程!")