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Wed Jul 26 02:58:03 EDT 2017

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Hello

random.choice on a set doesn't work because sets are
not indexable

so I found nothing better than taking an element and 
puting it back

a = {5, 7, 8, 3, 0, 8, 1, 15, 16, 34, 765443}
elt = a.pop()
a.add(elt)

any better idea, in a single instruction ?

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