code: def create_or_update_tags(self, tags):
          
          params = {}
          for i, tag in enumerate(tags):
              tag.build_params(params, i+1)
          return self.get_status('CreateOrUpdateTags', params, verb='POST')
docs: Creates new tags or updates existing tags for an Auto Scaling group.
  
          :type tags: List of :class:`boto.ec2.autoscale.tag.Tag`
          :param tags: The new or updated tags.