code: def main(argv=sys.argv[1:]):
      
      parser = setup_argparse()
      args = parser.parse_args(argv)
      if args.gendochelp:
          sys.argv[0] = 'gendoc.py'
          genparser = gendoc.setup_parser()
          genparser.print_help()
          sys.exit(0)
      print 'Preparing output directories'
      print '='*80
      for odir in args.output:
          prepare_dir(odir, not args.nodelete)
      print '\nRunning gendoc'
      print '='*80
      for i, idir in enumerate(args.input):
          if i >= len(args.output):
              odir = args.output[-1]
          else:
              odir = args.output[i]
          run_gendoc(idir, odir, args.gendocargs)
docs: Parse commandline arguments and run the tool
  
      :param argv: the commandline arguments.
      :type argv: list
      :returns: None
      :rtype: None
      :raises: None