[Tim]
Threads can be very useful purely as a means for algorithm structuring, due to independent control flows.
FWIW, I've been following the coroutine/continuation/generator bit with 'academic' interest -- the CS part of my brain likes to read about them. Prompted by Tim's latest mention of Demo/threads/Generator.py, I looked at it (again?) and *immediately* grokked it and realized how it'd fit into a tool I'm writing. Nothing to do with concurrency, I/O, etc -- just compartmentalization of stateful iterative processes (details too baroque to go over). More relevantly, that tool would be useful on thread-less Python's (well, when it reaches usefulness on threaded Pythons =). Consider me pro-generator, and still agnostic on the co* things. --david