selecting a random item from a set

[Paul Rubin]

Paul Rubin <http://phr.cx@NOSPAM.invalid> writes:
> The classic way to do it goes something like this:
> 
>   for n, randomElement in enumerate(s):
>      if random() < (1.0 / (n+1)):
>         e = randomElement
>    # possibly followed by
>    s.remove(randomElement)

Oops, meant to say:

   for n, e in enumerate(s):
      if random() < (1.0 / (n+1)):
         randomElement = e
    # possibly followed by
    s.remove(randomElement)