code: def get_digital_channels(channel_list):
      
      dig_ids = digital_channel_ids()
      dig_channels = []
      for ln in dig_ids:
          for ch in channel_list:
              if ch.dct['id'] == ln:
                  dig_channels.append(ch)
                  break
      return dig_channels
docs: Goes through channel list and returns digital channels with ids
      Dev1/port0/line08, Dev1/port0/line09... Dev1/port0/line30.