code: def dequeue(self, queue_type='default'):
          
          if not is_valid_identifier(queue_type):
              raise BadArgumentException('`queue_type` has an invalid value.')
  
          timestamp = str(generate_epoch())
  
          keys = [
              self._key_prefix,
              queue_type
          ]
          args = [
              timestamp,
              self._job_expire_interval
          ]
  
          dequeue_response = self._lua_dequeue(keys=keys, args=args)
  
          if len(dequeue_response) < 4:
              response = {
                  'status': 'failure'
              }
              return response
  
          queue_id, job_id, payload, requeues_remaining = dequeue_response
          payload = deserialize_payload(payload[1:-1])
  
          response = {
              'status': 'success',
              'queue_id': queue_id,
              'job_id': job_id,
              'payload': payload,
              'requeues_remaining': int(requeues_remaining)
          }
  
          return response
docs: Dequeues a job from any of the ready queues
          based on the queue_type. If no job is ready,
          returns a failure status.