TypeError: func must be a callable or a textual reference to one
scheduler를 돌릴 때 발생
scheduler 문법
scheduler = BackgroundScheduler()
scheduler.add_job(function(), 'cron', hour=12, minute=0)
scheduler.start()
scheduler = BackgroundScheduler()
scheduler.add_job(function, 'cron', hour=12, minute=0)
scheduler.start()