> Now, I don't know that I actually HAVE to pass my neural network and > input data as copies -- they're both READ-ONLY objects for the > duration of an evaluate function (which can go on for quite a while). One option in that case is to use "fork" (if you're on a *nix machine). See http://pythonwise.blogspot.com/2009/04/pmap.html for example ;) HTH -- Miki Tebeka <miki.tebeka at gmail.com> http://pythonwise.blogspot.com