code: def available(self):
          ''' Check if a related database exists '''
          return self.db_name in map(
              lambda x: x['name'], self._db.get_database_list()
          f available(self):
          ''' Check if a related database exists '''
          return self.db_name in map(
              lambda x: x['name'], self._db.get_database_list()
          )
docs: Check if a related database exists