Common functions for interacting with PiFace products.
http://piface.github.io/pifacecommon/
You can also find the documentation installed at:
/usr/share/doc/python3-pifacecommon/
Make sure you are using the lastest version of Raspbian:
$ sudo apt-get update
$ sudo apt-get upgrade
Install pifacecommon (for Python 3 and 2) with the following command:
$ sudo apt-get install python{,3}-pifacecommon
You will also need to set up automatic loading of the SPI kernel module which
can be done with the lastest version of raspi-config. Run:
$ sudo raspi-config
Then navigate to Advanced Options, SPI and select yes.