Paul Hankin wrote:
> On Oct 10, 9:12 pm, Tim Chase <[EMAIL PROTECTED]> wrote:
>> >>> pairs = (test[i:i+2] for i in xrange(len(test)-1))
>> >>> for a,b in pairs:
>> ... print a,b
>
> for a, b in zip(test, test[1:]):
> print a, b
Very nice!
I second this solution as better than my original. The only
"improvement" (in quotes, because it might be more work/opacity
than the problem merits) might be to use izip/islice from
itertools to do the evaluation lazily if "test" gets large:
from itertools import izip, islice
for a,b in izip(test, islice(test, 1, None)):
print a,b
[side note/question]
What's with islice having the first optional paramenter expand as
the stop/third argument by default:
islice(test, 1) -> stop at 1
islice(test, 1, 2) -> start at 1, stop at 2
islice (in python2.4) doesn't even take kword params, so you
can't force it like
islice(test, start=1)
but instead must specify a stop parameter, even if it's None:
islice(test, 1, None)
Seems bogus, IMHO.
-tkc
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