List as FIFO in for loop
Paul Hankin
paul.hankin at gmail.com
Sat Mar 8 18:55:29 EST 2008
On Mar 8, 10:42 pm, Carl Banks <pavlovevide... at gmail.com> wrote:
> On Mar 8, 9:43 am, malkarouri <malkaro... at gmail.com> wrote:
>
> > Hi everyone,
>
> > I have an algorithm in which I need to use a loop over a queue on
> > which I push values within the loop, sort of:
>
> > while not(q.empty()):
> > x = q.get()
> > #process x to get zero or more y's
> > #for each y:
> > q.put(y)
>
> Why not just do it like that? With a few changes it'll work fine:
>
> while q:
> x = q.pop(0)
> for y in process(x):
> q.append(y)
Or (almost) equivalently...
while q:
x = q.pop(0)
q.extend(process(x))
--
Paul Hankin
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