Advent of Code 2021

Environment setup

Install support code

Setup support code:

pip install -e ./support
pip install pytest # optional for testing

Setup .env with AOC cookie

Create .env in the root with the AOC session cookie value (use inspector or Edit This Cookie extension)

session=abc123456790

Install pyclip (optional)

Optionally, install pyclip -- when you run your code, the answer will be copied to the clipboard

Usage

Starting the day

aoc2021/day0 contains the code template to start each challenge

When the day is about to begin (a second or 3 beforehand) run the download-input command to download the input:

YEAR=2021
DAY=1
cp aoc2021/day0 "aoc2021/day${DAY}"
pushd "aoc2021/day${DAY}"
download-input "$YEAR" "$DAY"
popd

The script will download the input for the day and place it in the newly created directory. It will also display a small sample of the input text.

(when you move on to part 2, just copy part1.py to part2.py)

Testing

Each day will have a sample input text in the question and the expected solution, given the sample input.

In the part1.py file, enter the sample input as the INPUT_S constant, and the expected answer as the EXPECTED constant.

To test, run pytest on the solution file to test against the sample and expected.

pytest "aoc2021/day${DAY}/part1.py"

Running solutions

When your test passes, run the file normally and (if you installed pyclip) the answer will be copied to your clipboard.

python "aoc2021/day${DAY}/part1.py"

A handy way to do both testing and (if tests pass) copying the answer is to do something like:

pytest "aoc2021/day${DAY}/part1.py" && python "aoc2021/day${DAY}/part1.py"