Для openSUSE Tumbleweed запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:python:django/openSUSE_Tumbleweed/devel:languages:python:django.repo
zypper refresh
zypper install python-django-polymorphic
Для 16.0 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:python:django/16.0/devel:languages:python:django.repo
zypper refresh
zypper install python-django-polymorphic
Для 15.6 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:python:django/15.6/devel:languages:python:django.repo
zypper refresh
zypper install python-django-polymorphic
Для 15.5 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:python:django/15.5/devel:languages:python:django.repo
zypper refresh
zypper install python-django-polymorphic