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

cron job例子

   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:   

Cron表达 式说明

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

posted @ 2015-05-13 18:52 Ants 阅读(...) 评论(...) 编辑 收藏