On Sat, Apr 4, 2009 at 5:58 PM, Benjamin Peterson <benjamin@python.org> wrote:

2009/4/4 Leif Walsh <leif.walsh@gmail.com>:

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On Sat, Apr 4, 2009 at 5:38 PM, Benjamin Peterson <benjamin@python.org> wrote:

...

print "The first number less than 5 in this list is %s" % (my_list.index(5, operator.lt),)

print "The first number less than 5 in this list is my_list[%d]=%s" % ((idx, elt) for idx, elt in enumerate(my_list) if elt < 5).next()

That does something different. My would tell you the first index of a number less than 5 and your what tell you what that was.

Mine does both, actually, and you can get whichever part you need out of it.

Did you see the 2to3 one?

Yes. I don't know the details of the implementations of those classes, but I think you could easily cook up something quite similar to what I did above. I'm not really -1 or +1 on this, I just think it's probably easier for you to use a generator expression than to try to convince python-ideas that this needs to happen. My finger could be way off the list's pulse though. -- Cheers, Leif