Para 16.0 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:python:backports/16.0/devel:languages:python:backports.repo
zypper refresh
zypper install python-Pweave
Para 15.6 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:python:backports/15.6/devel:languages:python:backports.repo
zypper refresh
zypper install python-Pweave
Para 15.5 corra o seguinte como root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:python:backports/15.5/devel:languages:python:backports.repo
zypper refresh
zypper install python-Pweave