On Fri, 24 May 2013 01:14:45 -0700, Peter Brooks wrote: > What is the easiest way to reorder a sequence pseudo-randomly?
import random random.shuffle(sequence) The sequence is modified in place, so it must be mutable. Lists are okay, tuples are not. > That is, for a sequence 1,2,3,4 to produce an arbitrary ordering (eg > 2,1,4,3) that is different each time. You can't *guarantee* that it will be different each time. With a four- item list, there are only 4! = 24 combinations, so on average you'll get the original order one time in 24. For a ten-item list, that is once every 3628800 times, and for a twenty-item list, once in 2432902008176640000 times. But of course these are *random*, and there's always a chance of this: http://dilbert.com/strips/comic/2001-10-25 -- Steven -- http://mail.python.org/mailman/listinfo/python-list
