def _get_drivers():
 global _drivers
 if (_drivers is None):
  _drivers = {}
  for notification_driver in CONF.notification_driver:
   add_driver(notification_driver)
 return _drivers.values()

def _get_drivers ( ) : global _drivers if ( _drivers is None ) : _drivers = { } for notification_driver in CONF . notification_driver : add_driver ( notification_driver ) return _drivers . values ( )
instantiates and returns drivers based on the flag values .