How to use the pyfuse3.main function in pyfuse3

block_cache.init(options.threads)

        nursery.start_soon(metadata_upload_task.run, name='metadata-upload-task')
        cm.callback(metadata_upload_task.stop)

        nursery.start_soon(commit_task.run, name='commit-task')
        cm.callback(commit_task.stop)

        exc_info = setup_exchook()

        if options.systemd:
            import systemd.daemon
            systemd.daemon.notify('READY=1')

        try:
            ret = await pyfuse3.main()
        finally:
            await operations.destroy()
            await block_cache.destroy(options.keep_cache)

        if ret is not None:
            raise RuntimeError('Received signal %d, terminating' % (ret,))

        # Re-raise if main loop terminated due to exception in other thread
        if exc_info:
            (exc_inst, exc_tb) = exc_info
            raise exc_inst.with_traceback(exc_tb)

        log.info("FUSE main loop terminated.")

        unmount_clean = True

args = parse_args()
    if args.debug:
        logging.getLogger().setLevel(logging.DEBUG)

    argv = args.argv_prefix if args.argv_prefix else ("bash", "-c")
    operations = BashFS(argv_prefix=argv, separator=args.separator.encode())

    fuse_options = set(pyfuse3.default_options)
    fuse_options.add("fsname=bashfs")
    fuse_options.discard("default_permissions")
    if args.debug_fuse:
        fuse_options.add("debug")
    pyfuse3.init(operations, args.mountpoint, fuse_options)

    try:
        trio.run(pyfuse3.main)
    except:
        pyfuse3.close(unmount=True)
        raise

    pyfuse3.close()