Following my comment in PR #49 , I think that the setup.py and/or the MANIFEST.in are incomplete since the installation using pip does not include the necessary directory pymrio/mrio_models/exio20 and all its content.
This is probably the same problem behind the comment by @bixiou in issue #9
Idea:
Try to include it in setup.py and MANIFEST.in
May also have something to do with the fact that pymrio/mrio_models/exio20 does not have a init.py, such that it may not be considered as part of the package in sdist
Motivation:
pymrio/mrio_models/exio20
and all its content.Idea: