Reilly has written a python module to assist with linear error propagation for his own python projects, and some of you have expressed interest in using it. This is entirely optional. The relevant files are included in this secret zip file (change the extension to .zip to unpack it). Ensure that your academic priorities remain on the OD project itself rather than bells and whistles, but if you’re finding yourself with too much free time, feel free to take a look.
If you’ve followed the directions from this post and have a working U:\pypackages directory set up, you can copy unum.py and einsum_py.py from the secret zip file linked above into U:\pypackages and be able to import unum while working in any directory.