Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:illuusio:buildbot-worker:suse/openSUSE_Tumbleweed/home:illuusio:buildbot-worker:suse.repo
zypper refresh
zypper install python-txaio
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:illuusio:buildbot-worker:suse/15.6/home:illuusio:buildbot-worker:suse.repo
zypper refresh
zypper install python-txaio
Для 15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/home:illuusio:buildbot-worker:suse/15.5/home:illuusio:buildbot-worker:suse.repo
zypper refresh
zypper install python-txaio