auto save

diy2.py

 username = "python"
 userpassword = "123456"
+loading_number = 3
 while True:
     name = input("请输入用户名:")
     if name != username:
         print("用户名错误") 
+        loading_number -= 1
+        print("你当前还可以登录："+str(number)+"次")
+        if loading_number == 0:
+            print("登录次数达到限制，拒绝登录")
+            exit()
         continue
     password = input("请输入密码:")
     if name == username and password == userpassword:
@@ -11,4 +17,9 @@ while True:
         break
     else:
         print("密码错误") 
+        loading_number -= 1
+        print("你当前还可以登录："+str(number)+"次")
+        if loading_number == 0:
+            print("登录次数达到限制，拒绝登录")
+            exit()
 print("欢迎来到贝尔编程!")
\ No newline at end of file