I'm developing a small tray-icon application for Windows and I need to display non-intrusive visual notifications similar to those that appear when you receive a new message in MSN Messenger or any other IM application.

I have looked at [Snarl](http://www.fullphat.net/index.php), but it seems to be a separate application that I need to install. I want something that could be bundled with my application in one installer, a library.

Which one do you recommend?

Python support is a huge plus.