Project handled with 'virtualevn'
Basic steps to install 'virtualenv'
> pip3 install virtualenv
> cd SnAkE
> ~/Library/Python/3.7/bin/virtualenv .
> virtualenv --python=<path to python3>/python3 .
> source ./bin/activate
> pip3 install -r requirements.txt
…
> deactivate
> pip freeze > requirements.txt
$ python --version Python 3.7