code: def main():
      """
      Create code file with the following format:
          {'audio': 'file1', 'unitA': 'file1_chnl1_units', 'unitB': 'file1_chnl2_units'}
          {'audio': 'file2', 'unitA': 'file2_chnl1_units', 'unitB': 'file2_chnl2_units'}
          ...
  
      Given the input units files
          - channel1_units_file:
              file1|file1_chnl1_units
              file2|file2_chnl1_units
              ...
          - channel2_units_file:
              file1|file1_chnl2_units
              file2|file2_chnl2_units
              ...
      """
  
      parser = argparse.ArgumentParser()
      parser.add_argument(
          "channel1_units_file",
          type=str,
          help="Units of the first channel.",
      )
      parser.add_argument(
          "channel2_units_file",
          type=str,
          help="Units of the second channel.",
      )
      parser.add_argument(
          "output_file",
          type=str,
          help="Output file.",
      )
      parser.add_argument(
          "--channels",
          type=str,
          default="unitA,unitB",
          help="Comma-separated list of the channel names to create in the code"
          "(Default: 'unitA,unitB').",
      )
  
      args = parser.parse_args()
  
      channel_names = args.channels.split(",")
  
      with open(args.channel1_units_file) as funit1, open(
          args.channel2_units_file
      ) as funit2, open(args.output_file, "w") as fout:
          for line1, line2 in zip(funit1, funit2):
              fname1, units1 = line1.strip().split("|")
              fname2, units2 = line2.strip().split("|")
              assert len(units1.split()) == len(
                  units2.split()
              ), f"Mismatch units length ({len(units1.split())} vs {len(units2.split())})"
              base_fname1 = fname1[:-9]
              base_fname2 = fname2[:-9]
              assert base_fname1 == base_fname2, (
                  f"Mismatch filenames ({base_fname1} vs {base_fname2}). "
                  f"Expected $filename-channel1 and $filename-channel2 in two files"
              )
              code = {
                  "audio": base_fname1,
                  channel_names[0]: units1,
                  channel_names[1]: units2,
              }
              fout.write(str(code))
              fout.write("\n")
      print(f"Codes written to {args.output_file}")
  
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types