Discussion on: AoC Day 1: Chronal Calibration

Ah! So good. The clean-ness of Python never stops making me happy!

Using a set was a good idea. I didn't think of that, but it would be a lot faster for checking whether or not an item was present.

I'm going to offer unsolicited suggestions, but feel free to totally ignore them if you already knew about them (probable) or don't like them, since your solution already looks really nice.

1. For part one, generator expressions could be your friend:

data = open('input.txt', 'r')
total = sum(int(line) for line in data)
print(total)

1. For the second part, check out itertools.cycle.