For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Rotkraut:Opt-Python/openSUSE_Tumbleweed/home:Rotkraut:Opt-Python.repo
zypper refresh
zypper install opt-python312
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Rotkraut:Opt-Python/15.5/home:Rotkraut:Opt-Python.repo
zypper refresh
zypper install opt-python312
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:Rotkraut:Opt-Python/15.4/home:Rotkraut:Opt-Python.repo
zypper refresh
zypper install opt-python312