I am building a multiplayer game, so once the server started i want to broadcast server name continuously so that client can know that there are some server is running. I don't want to give IP address and port number to connect to server. can someone help me to broadcast server name.

its an app not an web app.
If the location of your server is constant, why wouldn't you just define the server ip address in your code and have your script connect to it? The user would never have to see the ip address of your server.
Broadcasting socket server in python