pypubsub

PyPubSub provides a publish - subscribe API that facilitates the development of
event-based (also known as message-based) applications. PyPubSub supports sending and
receiving messages between objects of an application, as well as a variety of
advanced features that facilitate debugging and maintaining topics and messages
in larger applications.

I have moved the project to github at https://github.com/schollii/pypubsub.