I wrote this for my own personal use. You might need to deviate from the instructions as necessary for your particular environment.
python3 -m pip install requirements.txt
chmod +x ./pygcal_environ.sh && source ./pygcal_environ.sh
Note: you could also try copying 'pygcal_environ.sh' to your '~/.bashrc' if you can't get it working.
./setup_pygcal_notify.sh