While I was adding support for the Wave Plus to my fork I also successfully upgraded it to Python 3 (using balenalib/raspberrypi3-alpine-python:3 as the base image).
If you're interested, I would gladly cook up a pull request containing the necessary changes.
User Story
As a developer, I want the image to run on Python 3 so that I can have this project still working for the foreseeable future.
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