Thank you for the answers! It was much simpler than I thought. On Wednesday, 6 February 2013 17:49:06 UTC+1, Alain Ketterlin wrote: > Julien Le Goff <julien.leg...@gmail.com> writes: > > > > > Today I came accross a behaviour I did not expect in python (I am > > > using 2.7). In my program, random.random() always seemed to return the > > > same number; it turned out to be related to the fact that I was using > > > os.fork. > > > > The random number generator is initialized once, when the module is > > first imported. Forking simply duplicates the process in its current > > state, so no reinitilization occurs, both (or all) processes' generators > > are in the same state, and therefore generate the same sequence. > > > > -- Alain.
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