[myroon5]

Neat.

I see that you explicitly specify 8 as the number of processes here. In Java, parallelStream() will pick a sane default for you if you haven't previously specified (based on the number of available processors, I believe). Is something like that possible in Python?

[jstarfish]

The ThreadPool class picks a sane default (number of cores), but I believe it uses Python threads instead of processes.