random numbers, threads and reproducibility

[Courageous]

>> I am developing a small class framework for Genetic Algorithms in
>> Python, and wishing to create some threads, I face a problem:
>> One of the requirements I want to keep is reproducibility.

[snip astute observation regarding threads and randomness].

One way around this particular problem is to use cooperative
multithreading with your own scheduler. Without any preemptive
multitasking involved, the unfolding of your simulation will be
completely deterministic.

C//