These are my solutions to Advent of Code 2020 in Python. These were written running Python 3.8.5 specifically.
To run first move to the src directory by doing cd src/. Then do invoke one of three commands.
This runs a single day with default input file (../inputs/dXY.in)
python run.py -d <day_number>
You can also add the -f flag followed by a file name/path to instead run with custom input.
python run.py -d <day_number> -f <file>
Finally, you can run all days with their default inputs with the -a flag.
python run.py -a
Each run prints the results for parts 1 and 2 respectively followed by the total runtime of both parts.