def save(self, filename=None):
        filename = Path(filename) if filename is not None else self.filename
        with filename.open("w") as f:
            f.write(self.yaml)
def _every_weekday(job, weekday, loop=None):
    return every(job, timedelta=timedelta(days=7), start_at=_nearest_weekday(weekday), loop=loop)