system-config-printer-* packages should contain byte-compiled Python files. There is a try to byte-compile Python files in the specfile but the definition in %files sections don't seem to include any __pycache__ folder with byte-compiled Python files.
It seems that this is caused by a switch from Python 2 to Python 3 because Python 2 produces .pyc and .pyo files in the same folder as a source file is and %files sections contain an asterisk after every ".py" suffix.
Let me know if I can help you with anything.
thank you for reporting the issue and your help! The issue is fixed in rawhide as build system-config-printer-1.5.11-18.fc31.