Hello Ben. Sorry for the late reply. I’ve put the code in a GitHub repository at https://github.com/steve-bate/python-sensi.
I’m not currently using this code because I run my Sensi thermostats without a C wire (battery power only) and I didn’t want to drain the battery with periodic queries to the device. Initially, I wanted to run this code in Jython but there was an issue with one of the standard libraries (I don’t remember the exact details now). The code in the repository includes an external CPython program that queries the Sensi and publishes data to OH using the ReST API.