Inky pHAT is a 212x104 pixel e-paper display, available in red/black/white, yellow/black/white and black/white. It's great for nametags and displaying very low frequency information such as a daily calendar or weather overview.
Inky wHAT is a 400x300 pixel e-paper display available in red/black/white. It's got tons of resolution for detailed daily todo lists, multi-day weather forecasts, bus timetables and more.
The Python pip package is named einky, install with:
sudo pip install einky
The Inky library contains modules for both the pHAT and wHAT, load the InkyPHAT one as follows:
from inky import InkyPHAT
You'll then need to pick your colour, one of 'red', 'yellow' or 'black' and instantiate the class:
inkyphat = InkyPHAT('red')
If you're using the wHAT you'll need to load the InkyWHAT class from the Inky library like so:
from inky import InkyWHAT inkywhat = InkyWHAT('red')
Since Inky wHAT is currently only available in red, we pick that colour.