code: def get_bucket(self, bucket, marker=None, max_keys=None, prefix=None):
          args = []
          if marker is not None:
              args.append(("marker", marker))
          if max_keys is not None:
              args.append(("max-keys", "%d" % (max_keys,)))
          if prefix is not None:
              args.append(("prefix", prefix))
          if args:
              object_name = "?" + urlencode(args)
          else:
              object_name = None
          details = self._details(
              method=b"GET",
              url_context=self._url_context(bucket=bucket, object_name=object_name),
          )
          d = self._submit(self._query_factory(details))
          d.addCallback(self._parse_get_bucket)
          return d