How to use the wikiextractor.show_file_error function in wikiextractor

try:
                if arg[-1] in 'kK':
                    file_size = int(arg[:-1]) * 1024
                elif arg[-1] in 'mM':
                    file_size = int(arg[:-1]) * 1024 * 1024
                else:
                    file_size = int(arg)
                if file_size < 200 * 1024: raise ValueError()
            except ValueError:
                wikiextractor.show_size_error(script_name, arg)
                sys.exit(2)
        elif opt in ('-o', '--output'):
            if os.path.isdir(arg):
                output_dir = arg
            else:
                wikiextractor.show_file_error(script_name, arg)
                sys.exit(3)

    if len(args) > 0:
        wikiextractor.show_usage(sys.stderr, script_name)
        wikiextractor.show_suggestion(sys.stderr, script_name)
        sys.exit(4)

    wiki_extractor = AnnotatedWikiExtractor()
    output_splitter = wikiextractor.OutputSplitter(compress, file_size, output_dir)
    process_data(sys.stdin, wiki_extractor, output_splitter)

    output_splitter.close()

try:
                if arg[-1] in 'kK':
                    file_size = int(arg[:-1]) * 1024
                elif arg[-1] in 'mM':
                    file_size = int(arg[:-1]) * 1024 * 1024
                else:
                    file_size = int(arg)
                if file_size < 200 * 1024: raise ValueError()
            except ValueError:
                wikiextractor.show_size_error(script_name, arg)
                sys.exit(2)
        elif opt in ('-o', '--output'):
            if os.path.isdir(arg):
                output_dir = arg
            else:
                wikiextractor.show_file_error(script_name, arg)
                sys.exit(3)

    if len(args) > 0:
        wikiextractor.show_usage(sys.stderr, script_name)
        wikiextractor.show_suggestion(sys.stderr, script_name)
        sys.exit(4)

    wiki_extractor = AnnotatedWikiExtractor()
    output_splitter = wikiextractor.OutputSplitter(compress, file_size, output_dir)
    process_data(sys.stdin, wiki_extractor, output_splitter)

    output_splitter.close()