From Gadgetoid's python-keybow
This is an implementation of Gadgetoid's python-keybow in a working case example From https://github.com/pimoroni/keybow-python
keys.py This assigns a different colour to each LED, dim without press, bright with press This assigns a different key action to each key
leds.py Cycles through rgb spectrum on keys and assigns a different action to each key