code: def main():
      
      global __verbose
      # Parse CMD args
      parser = argparse.ArgumentParser(description='DFU Python Util')
      #parser.add_argument("path", help="file path")
      parser.add_argument(
          "-l", "--list",
          help="list available DFU devices",
          action="store_true",
          default=False
      )
      parser.add_argument(
          "-m", "--mass-erase",
          help="mass erase device",
          action="store_true",
          default=False
      )
      parser.add_argument(
          "-u", "--upload",
          help="read file from DFU device",
          dest="path",
          default=False
      )
      parser.add_argument(
          "-v", "--verbose",
          help="increase output verbosity",
          action="store_true",
          default=False
      )
      args = parser.parse_args()
  
      __verbose = args.verbose
  
      if args.list:
          list_dfu_devices(idVendor=__VID, idProduct=__PID)
          return
  
      init()
  
      if args.mass_erase:
          print ("Mass erase...")
          mass_erase()
  
      if args.path:
          elements = read_dfu_file(args.path)
          if not elements:
              return
          print("Writing memory...")
          write_elements(elements, args.mass_erase, progress=cli_progress)
  
          print("Exiting DFU...")
          exit_dfu()
          return
  
      print("No command specified")
docs: Test program for verifying this files functionality.