diy2.py

username = "python"
userpassword = "123456"
i=3
if i>0:
    while True:
        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("垃圾，连自己名都记不住")
            continue
        if password!=userpassword:
            print("连密码都记不住，什么成分我不多说")
else:
    
    exit()