save project

diy2.py

+i=0
 username = "python"
 userpassword = "123456"
 while True:
+    if i>0:
         name = input("请输入用户名:") 
         if name != username:     
             print("用户名错误!请重新输入")
+            i=i+1
         else:
             password = input("请输入密码:")
             if password != userpassword:
@@ -11,4 +14,5 @@ while True:
             else:
                 print("登录成功")
                 break
+                exit()
 print("欢迎来到贝尔编程!")
\ No newline at end of file