code: def scale_group(self, group_id, scale_by):
          
          data = {'scaleBy': scale_by}
          response = self._do_request(
              'PUT', '/v2/groups/{group_id}'.format(group_id=group_id), data=json.dumps(data))
          return response.json()
docs: Scale a group by a factor.
  
          :param str group_id: group ID
          :param int scale_by: factor to scale by
  
          :returns: a dict containing the deployment id and version
          :rtype: dict