[Python-Dev] Proposal: new list function: pack

Sat Mar 21 05:04:58 CET 2009

Hrvoje Niksic wrote:
> Looking at izip(*[iter(l)]*n), I tend to agree.

Note that the itertools recipes page in the docs includes the following:
def pairwise(iterable):
 "s -> (s0,s1), (s1,s2), (s2, s3), ..."
 a, b = tee(iterable)
 next(b, None)
 return izip(a, b)
There are a couple of other variants here:
http://code.activestate.com/recipes/439095/
And a different take on providing similar functionality here:
http://code.activestate.com/recipes/544296/
However, the idea of providing a general windowing function in itertools
has been considered in the past and emphatically rejected:
http://mail.python.org/pipermail/python-dev/2006-May/065305.html
Cheers,
Nick.
-- 
Nick Coghlan | ncoghlan at gmail.com | Brisbane, Australia
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