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From: Joshua Landau <joshua.landau.ws@gmail.com>
Date: Tue, 11 Jun 2013 15:22:56 +0100
Subject: Re: Split a list into two parts based on a filter?
To: Peter Otten <__peter__@web.de>
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Xref: csiph.com comp.lang.python:47662

On 11 June 2013 01:11, Peter Otten <__peter__@web.de> wrote:
> def partition(items, predicate=bool):
>     a, b = itertools.tee((predicate(item), item) for item in items)
>     return ((item for pred, item in a if not pred),
>             (item for pred, item in b if pred))

I have to tell you this is the coolest thing I've read today. I'd
never have thought of that.