Project handled with 'virtualevn'
Basic steps to install 'virtualenv'
> pip3 install virtualenv
> cd makerEyes
> ~/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
Installing collected packages: virtualenv The script virtualenv is installed in '/Users/giulio.cesare/Library/Python/3.7/bin' which is not on PATH. Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
$ python --version Python 3.6.1