save project

diy2.py

@@ -6,9 +6,9 @@ while True:
     if a==username and b==userpassword:
         print("输入正确，登录成功")
         break
-    elif a==username and not b==userpassword:
+    elif a==username and b!=userpassword:
         print("名称正确，密码错误，请重新输入")
-    elif not a==username and b==userpassword:
+    elif a!=username and b==userpassword:
         print("密码正确，名称错误，请重新输入")
     else:
         print("输入错误，请重新输入")
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