I'm very cautious about using PYTHONPATH in conjunction with conda, as that PYTHONPATH will stay the same regardless of what environment you are using, so any modules in PYTHONPATH could end up clashing with different versions and modules that you have loaded in various environments. I'm not sure whether we should ahve this in the text
_Originally posted by @davecash75 in https://github.com/HealthBioscienceIDEAS/Medical-Image-Registration-Short-Course/pull/19#discussion_r1663824671_
Ideas to fix this: Convert Jamie's code into a package so we can install it as part of the conda setup.