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:   

.csharpcode, .csharpcode pre
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.csharpcode .rem { color: #008000; }
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.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
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.csharpcode .lnum { color: #606060; }

Cron表达
.csharpcode, .csharpcode pre
{
font-size: small;
color: black;
font-family: consolas, "Courier New", courier, monospace;
background-color: #ffffff;
/*white-space: pre;*/
}
.csharpcode pre { margin: 0em; }
.csharpcode .rem { color: #008000; }
.csharpcode .kwrd { color: #0000ff; }
.csharpcode .str { color: #006080; }
.csharpcode .op { color: #0000c0; }
.csharpcode .preproc { color: #cc6633; }
.csharpcode .asp { background-color: #ffff00; }
.csharpcode .html { color: #800000; }
.csharpcode .attr { color: #ff0000; }
.csharpcode .alt
{
background-color: #f4f4f4;
width: 100%;
margin: 0em;
}
.csharpcode .lnum { color: #606060; }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