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-bootstrap3
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-bootstrap3
Для 15.4 запустите от имени root:
zypper addrepo https://download.opensuse.org/repositories/devel:languages:python:django/15.4/devel:languages:python:django.repo
zypper refresh
zypper install python-django-bootstrap3