sshd service restart example using python dbus API

sshd_service_restart_example.py

import sys 
import dbus

bus = dbus.SystemBus()
systemd = bus.get_object('org.freedesktop.systemd1', '/org/freedesktop/systemd1')
manager = dbus.Interface(systemd, 'org.freedesktop.systemd1.Manager')

def restart(service):
   """
   restart method will restart service that is passed in this method.
   It raise exception if there is error

   :param str service: name of the service
   """
   try:
       manager.RestartUnit(service, 'replace')
   except:
       sys.exit("Error: Failed to restart {}.".format(service))

if __name__ == "__main__":
        restart("sshd.service")