Created
February 27, 2018 12:06
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def pairwise(iterable, n): | |
iterator = iter(iterable) | |
items = [None]*n | |
for i in range(n): | |
try: | |
items[i] = next(iterator) | |
except StopIteration: | |
return | |
yield tuple(items) | |
first, *middle, last = items | |
for element in iterator: | |
first, *middle, last = *middle, last, element | |
yield (first, *middle, last) | |
items = pairwise(iterable=range(10), n=4) | |
for i in items: | |
print(i) | |
""" | |
(0, 1, 2, 3) | |
(1, 2, 3, 4) | |
(2, 3, 4, 5) | |
(3, 4, 5, 6) | |
(4, 5, 6, 7) | |
(5, 6, 7, 8) | |
(6, 7, 8, 9) | |
""" |
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