Python定时任务框架APScheduler 3.0.3 Cron示例

APScheduler是基于Quartz的一个Python定时任务框架，实现了Quartz的所有功能，使用起来十分方便。提供了基于日期、固定时间间隔以及crontab类型的任务，并且可以持久化任务。基于这些功能，我们可以很方便的实现一个python定时任务系统。

安装

安装过程很简单，可以基于pip和源码。

Pip install apscheduler==3.0.3

或者下载源码，运行命令：

Python setup.py install

   1:  #coding=utf-8

   2:  from apscheduler.schedulers.blocking import BlockingScheduler

   3:  from datetime import datetime

   4:  import time

   5:  import os

6:

   7:  def tick():

   8:      print('Tick! The time is: %s' % datetime.now())

9:

  10:  if __name__ == '__main__':

  11:      scheduler = BlockingScheduler()

  12:      scheduler.add_job(tick,'cron', second='*/3', hour='*')

  13:      print('Press Ctrl+{0} to exit'.format('Break' if os.name == 'nt' else 'C'))

  14:      try:

  15:          scheduler.start()

  16:      except (KeyboardInterrupt, SystemExit):

  17:          scheduler.shutdown()

18:

19:

20:

Expression	Field	Description
*	any	Fire on every value
*/a	any	Fire every a values, starting from the minimum
a-b	any	Fire on any value within the a-b range (a must be smaller than b)
a-b/c	any	Fire every c values within the a-b range
xth y	day	Fire on the x -th occurrence of weekday y within the month
last x	day	Fire on the last occurrence of weekday x within the month
last	day	Fire on the last day within the month
x,y,z	any	Fire on any matching expression; can combine any number of any of the above expressions