itertools doc example "consume"

[Skip Montanaro]

I've never really used itertools before.  While trying to figure out
how to break a list up into equal pieces, I came across the consume
function in the examples here:

http://docs.python.org/2/library/itertools.html

It seems to me that it should return whatever it consumes from the
list.  I thought you would call it like this:

    for chunk in consume(range(30), 5):
        print chunk

and see it print something like

[0, 1, 2, 3, 4]
[5, 6, 7, 8, 9]
...
[25, 26, 27, 28, 29]

If I call it like this:

lst = range(30)
consume(lst, 5)

it doesn't actually consume anything from lst.  Am I missing
something, or is that example missing a return or yield statement?

Thanks,

Skip