Para openSUSE Tumbleweed corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:inescid:python/openSUSE_Tumbleweed/home:inescid:python.repo
zypper refresh
zypper install python-ordered-set
Para 15.6 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:inescid:python/15.6/home:inescid:python.repo
zypper refresh
zypper install python-ordered-set
Para 15.5 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/home:inescid:python/15.5/home:inescid:python.repo
zypper refresh
zypper install python-ordered-set