auto save

diy2.py

-username = "python"
-userpassword = "123456"
-#重复执行
-    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!")
-        #跳出循环
-    #输出"账号或密码错误，请重新输入！"
-#输出"欢迎来到编程世界！"
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