def __str__(self):
        return "{}: (name: {}, iotype: {}, dtype: {}, dims: ({},{},{},{}) used_count: {})".format(self.index,
                            self.name, self.iotype2str[self.iotype], self.dtype2str[self.dtype],
                            self.dims[0], self.dims[1], self.dims[2], self.dims[3], self.used_count)