'Respond to a software version query.
Arguments:
iq -- The Iq stanza containing the software version query.'

def _handle_version(self, iq):

    iq.reply()
    iq['software_version']['name'] = self.software_name
    iq['software_version']['version'] = self.version
    iq['software_version']['os'] = self.os
    iq.send()
