Changelog for python3-ruamel.base-1.0.0-6.3.noarch.rpm :

* Mon Apr 24 2017 aloisioAATTgmx.com- Converted to single-spec
* Tue Oct 11 2016 rjschweiAATTsuse.com- Initial build (FATE#321630, bsc#1002895) + Include in SLES 12 + Version 1.0.0