Neal Becker wrote:
Is there any canned iterator adaptor that will
transform:
in = [1,2,3....]
into:
out = [(1,2,3,4), (5,6,7,8),...]
That is, each time next() is called, a tuple of the next N items is
returned.
Here's one that abuses a for loop:
from itertools import islice
def grouper(seq,n):
it = iter(seq)
for x in it:
yield (x,) + tuple(islice(it,n-1))
def test():
L = range(11)
n = 3
for x in grouper(L,n):
print x
if __name__ == '__main__':
test()
BTW what's up with the followup to gmane?
P.
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