For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mcepl:branches:devel:languages:python/openSUSE_Tumbleweed/home:mcepl:branches:devel:languages:python.repo
zypper refresh
zypper install virt-manager
For openSUSE Factory zSystems run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mcepl:branches:devel:languages:python/openSUSE_Factory_zSystems/home:mcepl:branches:devel:languages:python.repo
zypper refresh
zypper install virt-manager
For openSUSE Factory PowerPC run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mcepl:branches:devel:languages:python/openSUSE_Factory_PowerPC/home:mcepl:branches:devel:languages:python.repo
zypper refresh
zypper install virt-manager
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:mcepl:branches:devel:languages:python/15.6/home:mcepl:branches:devel:languages:python.repo
zypper refresh
zypper install virt-manager