def start():
    for folder in plug.folders_to_watch:
        try:
            os.makedirs(folder.path)
        except __HOLE__:
            # can be raised if the folder already exists
            pass

        if not os.path.exists(folder.path):
            raise DriverError(
                u"Could not create the folder '{}'.".format(folder.path)
            )

        watch_changes(folder)
        check_changes(folder)

    plug.listen()
dataset/ETHPy150Open onitu/onitu/drivers/local_storage/onitu_local_storage/local_storage.py/start