def _get_clean_data_collection(self):
    db_client = MongoClient(self._db_config.MONGODB_URI)
    db = db_client[self._db_config.MONGODB_QD]
    return db.clean_data
def _get_clean_data_collection(self):
    db_client = MongoClient(self._db_config.MONGODB_URI)
    db = db_client[self._db_config.MONGODB_QD]
    return db.clean_data