code: def schedule(identifier, **kwargs):
      '''Schedule a harvest job to run periodically'''
      source = actions.schedule(identifier, **kwargs)
      msg = 'Scheduled {source.name} with the following crontab: {cron}'
      log.info(msg.format(source=source, cron=source.periodic_task.crontab)f schedule(identifier, **kwargs):
      '''Schedule a harvest job to run periodically'''
      source = actions.schedule(identifier, **kwargs)
      msg = 'Scheduled {source.name} with the following crontab: {cron}'
      log.info(msg.format(source=source, cron=source.periodic_task.crontab))
docs: Schedule a harvest job to run periodically