Python split string in moving window

Question

I have a string with digits like so - digit = \"7316717\"

Now I want to split the string in such a way that the output is a moving window of 3 digits at

Answer 1

There is a very good recipe pairwise in itertools docs.

Modernizing it a bit for n elements in the group, I made this code:

from itertools import tee, izip

def window(iterable, n):
    els = tee(iterable, n)
    for i, el in enumerate(els):
        for _ in xrange(i):
            next(el, None)
    return izip(*els)


print(["".join(i) for i in window("2316515618", 3)])

Python 2.7