Reading a random element from a set

Wed Jul 26 03:49:22 EDT 2017

"Steven D'Aprano" <steve+comp.lang.python at pearwood.info> a écrit dans le message de 
news:597841eb0ドル2878ドル$c3e8da3$76491128 at news.astraweb.com...
> On 2017年7月26日 08:58:03 +0200, ast wrote:
>>> 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)
>>> That's not *random*, it is arbitrary but predictable. If you try it twice
> in a row, you will probably get the same element each time. (Depends on
> the elements, but very likely.)
>
> If you need a random element, best way is:
>>>>>>> random.choice(list(a))
> 8
>>>> random.choice(list(a))
> 15
>>>> random.choice(list(a))
> 16
>
Thanks
random.sample(a, 1)[0] works too