Your package python-gensim failed to build from source in current rawhide.
For details on mass rebuild see https://fedoraproject.org/wiki/Fedora_26_Mass_Rebuild
Created attachment 1253739 [details]
Created attachment 1253740 [details]
Created attachment 1253741 [details]
This bug appears to have been reported against 'rawhide' during the Fedora 26 development cycle.
Changing version to '26'.