def list_subdomains_next_page(self):
        uri = self._paging.get("subdomain", {}).get("next_uri")
        if uri is None:
            raise exc.NoMoreResults("There are no more pages of subdomains "
                    "to list.")
        return self._list_subdomains(uri)
When paging through subdomain results, this will return the next page,
dataset/ETHPy150Open rackspace/pyrax/pyrax/clouddns.py/CloudDNSManager.list_subdomains_next_page