code: def describe_volumes(self, *volume_ids):
          
          volumeset = {}
          for pos, volume_id in enumerate(volume_ids):
              volumeset["VolumeId.%d" % (pos + 1)] = volume_id
          query = self.query_factory(
              action="DescribeVolumes", creds=self.creds, endpoint=self.endpoint,
              other_params=volumeset)
          d = query.submit()
          return d.addCallback(self.parser.describe_volumes)
docs: Describe available volumes.