[Tutor] multithreading random()
rdm at rcblue.com
Tue Oct 10 10:03:30 CEST 2006
At 09:57 PM 10/9/2006, you wrote:
>On 10/10/06, Dick Moores <rdm at rcblue.com> wrote:
> > Please refer to
> > <http://www.python.org/doc/current/lib/module-random.html>, from
> which I quote:
> > "The functions supplied by this module are actually bound methods of
> > a hidden instance of the random.Random class. You can instantiate
> > your own instances of Random to get generators that don't share
> > state. This is especially useful for multi-threaded programs,
> > creating a different instance of Random for each thread, and using
> > the jumpahead() method to make it likely that the generated sequences
> > seen by each thread don't overlap."
> > Could someone point me to an example script where this was done? I'd
> > very much like to learn how to do that.
>Using google's code search, I found this:
> def _create_random_generators(self, num, delta, firstseed=None):
> """Return list of 'num' distinct generators.
> Each generator has its own unique segment of delta elements
> from Random.random()'s full period.
> Seed the first generator with optional arg firstseed (default
> is None, to seed from current time).
> g = Random(firstseed)
> result = [g]
> for i in range(num - 1):
> laststate = g.getstate()
> g = Random()
> return result
>Although, from looking at the docs you quoted, this may not be correct
Thanks, John, That's a start.
Didn't know about Google's code search,
<http://www.google.com/codesearch>. What was your search string?
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