code: def save(self, data, *args, **kwargs):
          
          try:
              collection_name = kwargs.get('collection_name',
                                           MONGODB_DEFAULT_COLLECTION)
              w = kwargs.get('w', 0)
  
              if not self.collection:
                  self.set_collection(collection_name)
  
              self.collection.insert(data, w)
          except (ConnectionFailure, AutoReconnect, InvalidURI), e:
              # fail silently - just log and die ...
              if ADD_LOG_FAILURES:
                  logging.exception(
                      'Error connection to %s, unable to insert %s' % (
                          MONGODB_URI, data))
docs: inserts data (dict or list of dicts)
          expected kwargs:
              collection_name: by default uses MONGODB_DEFAULT_COLLECTION
              w: by default set to 0 to disable write acknowledgement
          assumes that data has been verified / validated