from:https://apscheduler.readthedocs.io/en/v2.1.2/cronschedule.html Cron-style scheduling This is the most powerful scheduling method available in APScheduler. You can specify a variety of different expressions on each field, and when determining the
维基百科上是这样描述计划任务的: “Cron is a time-based job scheduler in Unix-like computer operating systems. Cron is short for Chronograph. Cron enables users to schedule jobs (commands or shell scripts) to run automatically at a certain time or date.” 有些场景下你需要定时的重