Simple algorithm question - how to reorder a sequence economically

[Fábio Santos]

On 24 May 2013 09:41, "Chris Angelico" <rosuav at gmail.com> wrote:
>
> On Fri, May 24, 2013 at 6:14 PM, Peter Brooks
> <peter.h.m.brooks at gmail.com> wrote:
> > What is the easiest way to reorder a sequence pseudo-randomly?
> >
> > That is, for a sequence 1,2,3,4 to produce an arbitrary ordering (eg
> > 2,1,4,3) that is different each time.
> >
...
> It works, it produces a unique list for any given index provided, but
> it's not the cleanest or most efficient. But I know someone'll improve
> on it... or tell me I'm an idiot for not taking a more obvious
> approach :)
>
> ChrisA

I think that is pretty much itertools.permutations from the standard
library. The OP should check it out.
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