How do your set the twitter byline from an application?

Twitter allows appli开发者_开发技巧cations to set a "byline" that appears after the tweeter's name, but I don't see how to set that. I'm currently using the Python API tweepy. Any ideas?

How do I get “from [MyApp]” appended to updates sent from my API application?

We now recommend developers use OAuth to perform authentication with the API. When applications use OAuth, Twitter automatically knows the source of status updates. We are therefore able to append source attribution (from "[MyApp]") to tweets. If you would like tweets from your application to receive a source parameter, please register an application and implement OAuth authentication. We will automatically include your application as the source for any tweets sent from your application.

We originally allowed applications to create a source parameter for non-OAuth use but that has been discontinued. Applications pre-OAuth source parameters will remain active, but new registrations are no longer accepted.

This FAQ tells you everything.