Para 16.0 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:Uyuni:AI:Deps:devel:languages:python/16.0/systemsmanagement:Uyuni:AI:Deps:devel:languages:python.repo
zypper refresh
zypper install python-referencing
Para 15.7 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/systemsmanagement:Uyuni:AI:Deps:devel:languages:python/15.7/systemsmanagement:Uyuni:AI:Deps:devel:languages:python.repo
zypper refresh
zypper install python-referencing