The Leap42.2 rpm installs the python packages into /Nagstamon instead of 
/usr/lib/python3.4/site-packages/

rpm -qpl nagstamon-2.0-37.1.noarch.rpm
/Nagstamon
/Nagstamon/Config.py
/Nagstamon/Helpers.py
/Nagstamon/Objects.py
/Nagstamon/QUI
/Nagstamon/QUI/__init__.py
/Nagstamon/QUI/__pycache__
/Nagstamon/QUI/__pycache__/__init__.cpython-34.pyc
/Nagstamon/QUI/__pycache__/__init__.cpython-34.pyo
...
/Nagstamon/thirdparty/zabbix_api.py
/Nagstamon/thirdparty/zenoss_api.py
/nagstamon-2.0-py3.4.egg-info
/nagstamon-2.0-py3.4.egg-info/PKG-INFO
/nagstamon-2.0-py3.4.egg-info/SOURCES.txt
/nagstamon-2.0-py3.4.egg-info/dependency_links.txt
/nagstamon-2.0-py3.4.egg-info/top_level.txt
/usr/bin/nagstamon
/usr/share/applications/nagstamon.desktop
/usr/share/doc/packages/nagstamon
/usr/share/doc/packages/nagstamon/COPYRIGHT
/usr/share/doc/packages/nagstamon/ChangeLog
/usr/share/doc/packages/nagstamon/LICENSE
/usr/share/man/man1/nagstamon.1.gz
/usr/share/pixmaps/nagstamon.svg