code: def play_from_queue(self, index, start=True):
          
          # Grab the speaker's information if we haven't already since we'll need
          # it in the next step.
          if not self.speaker_info:
              self.get_speaker_info()
  
          # first, set the queue itself as the source URI
          uri = 'x-rincon-queue:{0}#0'.format(self.uid)
          self.avTransport.SetAVTransportURI([
              ('InstanceID', 0),
              ('CurrentURI', uri),
              ('CurrentURIMetaData', '')
          ])
  
          # second, set the track number with a seek command
          self.avTransport.Seek([
              ('InstanceID', 0),
              ('Unit', 'TRACK_NR'),
              ('Target', index + 1)
          ])
  
          # finally, just play what's set if needed
          if start:
              self.play()
docs: Play a track from the queue by index.
  
          The index number is required as an argument, where the first index
          is 0.
  
          Args:
              index (int): 0-based index of the track to play
              start (bool): If the item that has been set should start playing