code: def broadcast(self, body, html_body=None, exclude=()):
          
          logger.info('broadcast on %s: %s' % (self.name, body,))
          for member in filter(lambda m: m.get('STATUS') == 'ACTIVE' and m not in exclude, self.params['MEMBERS']):
              logger.debug(member['JID'])
              self.send_message(body, member, html_body=html_body, quiet=True)
docs: Broadcast a message to users in the chatroom