save project

diy.py

 username = "pythen"
 userpassward = "123456"
-name = input("请输入你的用户名")
-passward = input("请输入你的密码")
-if name == username and userpassward == passward:
-    print("登陆成功")
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+while True:
+    name = input("请输入你的用户名")
+    passward = input("请输入你的密码")
+    if name == username and userpassward == passward:
+        print("登陆成功")
+        break
+    print("密码或用户名错误！请重新输入密码或用户名！")
+print("欢迎来到贝尔编程！")
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