Requirements should be listed in documentation and consideration for future packaging
Requirements for the software should include python 3.7 or higher And rsync be installed and in the path
Currently running 3.6.8 at LLO on the main system, and had to modify line 103 from: text=True to universal_newlines=True for it to run under 3.6.8.
Alternatively, using Michael Thomas' conda setup (conda activate igwn-py38) will also use python3.8 and works with the original arx code.