def get_subdomain_iterator(self, domain, limit=None, offset=None):
        return SubdomainResultsIterator(self._manager, domain=domain)
get database name from conf
dataset/ETHPy150Open rackspace/pyrax/pyrax/clouddns.py/CloudDNSClient.get_subdomain_iterator--crossover with--dataset/ETHPy150Open frappe/frappe/frappe/auth.py/HTTPRequest.get_db_name