There used to be a dbus module for python2 in tumbleweed, which is now missing.
As you can see, there is python3-debus, but no python-dbus.

$ zypper se dbus | grep python
   | python-dbus-python-common-devel                 | Python bindings for
D-Bus -- shared development files                  | package
i+ | python3-dbus-presage                            | Intelligent predictive
text entry platform (dbus service)              | package
i  | python3-dbus-python                             | Python bindings for
D-Bus                                              | package
   | python3-dbus-python-devel                       | Python bindings for
D-Bus -- development files                         | package
   | python3-pydbus                                  | Pythonic DBus library   
                                              | package
   | python3-python-dbusmock                         | Python library for
creating mock D-Bus objects                         | package
i  | python3-slip-dbus                               | Convenience functions
for dbus services                                | package