auto save

diy2.py

+username = "a"
+userpassword = "123456"
+i=3
+while True:
+    if i>0:
+        name = input("请输入用户名:")
+        password = input("请输入密码:")
+    
+        if name != username:
+            print("用户名不存在")
+            continue
+        if password !=userpassword:
+            print("密码错误")
+        i-=1
+        print("剩余",i)
+        if name == username and password == userpassword:
+            print("登录成功!")
+            break
+    else:
+        print("账户永久销毁")
+print(欢迎)
+    
+
+        
+ 
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