code: def loadCats(self, ids=[]):
          
          if type(ids) == list:
              return [self.cats[id] for id in ids]
          elif type(ids) == int:
              return [self.cats[ids]]
docs: Load cats with the specified ids.
          :param ids (int array)       : integer ids specifying cats
          :return: cats (object array) : loaded cat objects