text: from boomerang import Messenger, messages, buttons
  
  VERIFY_TOKEN = 'secret_code'
  PAGE_TOKEN = 'EAADJEe1tgFsBAELVVEsfZAYBecAbs97NkJ7faaW3U5uZCMsoc1PdEZAku6ZBHYB7CKoEqqJb8egQc8FVZA2ZARF5UTysvCKEKokiukTFZAd5pSRYj7qTJilzz3jZCZAhZBMgIh9zjLfKZAYk8QcbMfUKoKVEbWKW8293QAj2ZCTzeIZC9AgZDZD'
  
  class MyMessenger(Messenger):
  
      async def message_received(self, message):
          print('\nReceived message from {0}'.format(message.user_id))
          print('> {0}'.format(message.text))
          try:
              url_button = buttons.URLButton('Google', 'http://www.google.com')
              postback_button = buttons.PostbackButton('Postback', 'dummy_payload')
              default_action = messages.DefaultAction('https://i.imgur.com/MBUyt0n.png')
  
              element = messages.Element('Element', sub_title='Element subtitle',
                                      image_url='https://i.imgur.com/MBUyt0n.png',
                                      default_action=default_action,
                                      buttons=[url_button, postback_button])
  
              attachment = messages.GenericTemplate([element, element])
  
              reply = messages.Message(attachment=attachment)
              message_id = await self.send(message.user_id, reply)
          except Exception as e:
              print('EXCEPTION: ' + str(e))
          print('MID: ' + str(message_id))
  
  app = MyMessenger(VERIFY_TOKEN, PAGE_TOKEN)
  app.run(hostname='0.0.0.0', debug=True)
  