website/content/blog/pyleniterables.md
2020-03-29 00:35:21 -04:00

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Quick Python: Length of Iterables 2020-03-25T18:28:09-04:00 false
python

I wanted to find the length of what I know is a finite iterable. Normally you would think of using the len function but it does not work in this case. Al Hoo on StackOverflow shared a quick snippet to calculate this.

from functools import reduce

def ilen(iterable):
    return reduce(lambda sum, element: sum + 1, iterable, 0)

This also turns out to be memory efficient since we are only loading in one object into memory from the iterable at a time.