The packages are stuck on py3.6 which means they will be pain once we switch to 3.7. Please test them on 3.7 *and* 3.8 (so we don't to revisit this in a few months), and update PYTHON_COMPAT appropriately. If it doesn't work, please either fix it, remove Python or issue last rites. Please consider this urgent.
I was testing after seeing your mail on python 3.7 default :) paperwork was supporting newer python versions for some time (upstream testing is 3.8) but lacked dependencies until now. It looked good from test on both 3.7 and 3.8 so I updated PYTHON_COMPAT for: dev-python/simplebayes dev-python/libpillowfight dev-python/pyocr app-text/paperwork app-text/paperwork-backend