docs: def _get_machines_cache_from_dns(self, host, port):
          """One host might be resolved into multiple ip addresses. We will make list out of it"""
          if self.protocol == 'http':
              ret = []
              for af, _, _, _, sa in self._dns_resolver.resolve(host, port):
                  host, port = sa[:2]
                  if af == socket.AF_INET6:
                      host = '[{0}]'.format(host)
                  ret.append(uri(self.protocol, host, port))
              if ret:
                  return list(set(ret))
          return [uri(self.protocol, host, port)]