Parallel Python
by JS
I once tried to parallelize some Python code to take advantage of multiple processors, so I learned about the Global Interpreter Lock the hard way. Threads are supposed to allow for concurrency without protection. If you want concurrency and protection, use processes. The GIL is just a half-baked half measure between these two easy to state abstractions. That was the beginning of my path away from Python.
Anyway, for those still interested: Parallel Python
