My version:
from itertools import combinations as xcombinations
from itertools import izip, islice
def xpairwise(iterable):
# docs and doctests removed
return izip(iterable, islice(iterable, 1, None))
def segmentations(seq, k):
for comb in xcombinations(range(1, len(seq)), k-1):
yield [seq[start:stop] for start,stop in xpairwise((None,) +
comb + (None,))]
for seg in segmentations(range(1, 6), 3):
print seg
print
for seg in segmentations(range(1, 7), 2):
print seg
print
for seg in segmentations(range(1, 7), 3):
print seg
print
for seg in segmentations(range(1, 7), 4):
print seg
print
Other people have already explained how this works.
Bye,
bearophile
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