def _get_cache(self, name, constructor):
        try:
            return self.__dict__["_cache"][name]
        except __HOLE__:
            obj = constructor()
            self.__dict__["_cache"][name] = obj
            return obj
dataset/ETHPy150Open kdart/pycopia/storage/pycopia/durusplus/persistent_data.py/PersistentData._get_cache