Install py37-tox on macOS with MacPorts

If not done already, install MacPorts.

To install py37-tox, run the following command in macOS terminal (Applications->Utilities->Terminal)

sudo port install py37-tox

To see what files were installed by py37-tox, run:

port contents py37-tox

To later upgrade py37-tox, run:

sudo port selfupdate && sudo port upgrade py37-tox

Installations	4
Requested Installations	1