save project

diy1.py

 username="python"
 userpassword="123456"
-
-name=input("请输入用户名")
-password=input("请输入密码")
-
-if name == username and password == userpassword:
-    print("登陆成功")
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+while True:
+    name=input("请输入用户名")
+    password=input("请输入密码")
+    if name == username and password == userpassword:
+        print("登陆成功")
+        break
+    print("用户名或密码错误!请重新输入")
+print("欢迎来到贝尔编程")
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