For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/spins:invis:testing:python-packages/openSUSE_Tumbleweed/spins:invis:testing:python-packages.repo
zypper refresh
zypper install python-Sphinx-doc
For openSUSE 42.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/spins:invis:testing:python-packages/openSUSE_42.1/spins:invis:testing:python-packages.repo
zypper refresh
zypper install python-Sphinx-doc
For openSUSE 13.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/spins:invis:testing:python-packages/openSUSE_13.1/spins:invis:testing:python-packages.repo
zypper refresh
zypper install python-Sphinx-doc