code: def describe_instances(self, *instance_ids):
          
          instances = {}
          for pos, instance_id in enumerate(instance_ids):
              instances["InstanceId.%d" % (pos + 1)] = instance_id
          query = self.query_factory(
              action="DescribeInstances", creds=self.creds,
              endpoint=self.endpoint, other_params=instances)
          d = query.submit()
          return d.addCallback(self.parser.describe_instances)
docs: Describe current instances.