The SpasmodicEngine selects tasks (spasmoids) from a (heapqueue based) priority queue. The tasks are Python 2.5 extended generators (some call them coroutines: PEP 342). The engine calls task.send() with an appropriate argument. One of the library of tasks is Pollster. Pollster calls poll() with for tasks that are waiting I/O. Tasks that are ready for I/O are fed to the priority queue.

Spasmodic provides an efficient way to manage a large number of sockets and/or files. Other processing works well too, if it can be subdivided into brief spasms.

Download from: http://www.python.org/pypi/spasmoidal/0.1.1