No need to run the command to install json package, because it is already part of Python. I have updated instructions in the wiki.
Just tested the code and seems to work fine with Python 3.7.5. There are a few minor issues with the package I am currently working to fix. I tested this on Ubuntu 19.10. I’m looking into all operating systems and getting BlinkStick to work everywhere now with Python package so it may take some time. You can install it via github:
pip install git+https://github.com/arvydas/blinkstick-python
It would be very helful if you could let me know the OS you are trying to get this to run so I could give you a faster solution.