All Python 3 packages now get bytceode related errors with Python 3.7.
See for example https://taskotron.fedoraproject.org/artifacts/all/7653ca56- 8370-11e8-bbcf-525400fc9f92/ tests.yml/python-libsass-0.14. 5-1.fc29.log
rpmlint was fixed to work with Python 3.7 bytecode in 1.10-14.
Note that form the logs it seems you run fc28 rpmlint on rawhide builds. Is that OK? I've told spot that the 3.7 related fixes are not needed on F28, but are they?