kj wrote:
Is there a special pythonic idiom for iterating over a list (or
tuple) two elements at a time?
I mean, other than
for i in range(0, len(a), 2):
frobnicate(a[i], a[i+1])
?
I think I once saw something like
for (x, y) in forgotten_expression_using(a):
frobnicate(x, y)
Or maybe I just dreamt it! :)
Thanks!
I saw the same thing, forgot where though. But I put it in my library.
Here it is:
# x.py
import itertools
def pairs(seq):
is1 = itertools.islice(iter(seq), 0, None, 2)
is2 = itertools.islice(iter(seq), 1, None, 2)
return itertools.izip(is1, is2)
s = range(9)
for x, y in pairs(s):
print x, y
[EMAIL PROTECTED]> python x.py
0 1
2 3
4 5
6 7
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