Advent of Code solution

My code to find solutions to the Advent of Code.

Implementation Methodology

To follow how the code was created these are the steps I've settled on:

capturing the input in examples*.txt and input.txt.
copy part1.py from the previous day just to bootstrap the imports and basic input code.
change the code until it works.
copy part1.py to part2.py.
change the code until it works.
commit all files unchanged from the moment I got the answer.

I feel like this will leave a good record of how I handled the change in requirements from part 1 to 2.

The solution for each day is in two parts (1 & 2) and requires python3 to be installed

in general they can be run with ./part1.py input.txt

they generally print more than necessary but the answer is always on the final line.