comment = 'Cannot execute "{method}" on {device}{port} as {user}. Reason: {error}!'.format(
                device=napalm_device.get('HOSTNAME', '[unspecified hostname]'),
                port=(':{port}'.format(port=napalm_device.get('OPTIONAL_ARGS', {}).get('port'))
                      if napalm_device.get('OPTIONAL_ARGS', {}).get('port') else ''),