auto save

diy2.py

 username = "python"
 userpassword = "123456"
-while True:
+#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!")
-    print("用户名和密码错误!请重新输入")
-print("欢迎来到贝尔编程!")
\ No newline at end of file
+        #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！"
\ No newline at end of file