Your package python-attrs failed to build from source in current F28. https://koji.fedoraproject.org/koji/taskinfo?taskID=24870096 For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
There is a rawhide build BTW. So all this needs is a new one for F28 I guess.
A build was successfull: python-attrs-17.4.0-2.fc28 [1]. No update was found in bodhi. Closing the bug nonetheless. [1] https://koji.fedoraproject.org/koji/buildinfo?buildID=1018215