Whoa, via the Python Daily-URL, Aspect Oriented Programming for Python with TransWarp. I don't totally grok AOP yet (well, at least not how it would actually work in a practical system), but I'm glad to see work being done on it, and in Python no less 
Check out their IntroToAOP to get a short intro to Aspect Oriented Programming: "An "aspect" is an "area of concern" that cuts across the structure of a program. For example, data storage is an aspect. User interface is an aspect. Platform-specific code is an aspect. Security is an aspect. Distribution, logging, class structure, threading... they're all aspects."
Also check out the AOP section on my programming page I just linked to above.
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