4.1 APS定时框架

本节主题: 4.1 APS定时框架

课程讲师: Charlie

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1 本节要点

  • 掌握ASP定时框架;

2 课前准备

2.1 安装Apscheduler

在cmd(Windows)或终端(Mac)输入:

pip install apscheduler

3 课程内容

3.1 APS定时框架

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。

from apscheduler.schedulers.blocking import BlockingScheduler

scheduler = BlockingScheduler()

scheduler.add_job(<函数名>, <触发器>, 触发器的调度方法 , )
#scheduler.add_job(<函数名>, <触发器>, args=(a,) , 触发器的调度方法d , )

scheduler.start()

APS提供了三种触发器供选择,date, interval, cron可供选择,其实看字面意思也可以知道,date表示具体的一次性任务,interval表示循环任务,cron表示定时任务


3.1.1 一次性任务 - date

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from datetime import datetime
from apscheduler.schedulers.blocking import BlockingScheduler

def tick(x):
    print('Tick! The time is: %s' % datetime.now(),x)

if __name__ == '__main__':
    scheduler = BlockingScheduler()
    scheduler.add_job(tick,'date', args=('一次性任务',), run_date =datetime.datetime.now() + datetime.timedelta(seconds=12))
    scheduler.start()

run_date (datetime|str) – the date/time to run the job at

  • datetime.date(2009, 11, 6)
  • datetime。datetime(2009, 11, 6, 16, 30, 5)
  • ‘2019-11-06 16:30:05’

timezone (datetime.tzinfo|str) – time zone for run_date if it doesn’t have one already

  • 默认采用本地时区
  • 可以用pytz指定时区,timezone=pytz.utc

3.1.2 间隔性任务 - intervals

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from datetime import datetime
from apscheduler.schedulers.blocking import BlockingScheduler


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


if __name__ == '__main__':
    scheduler = BlockingScheduler()
    scheduler.add_job(tick, 'interval', seconds=3)
    scheduler.start()

weeks (int) – number of weeks to wait

days (int) – number of days to wait

hours (int) – number of hours to wait

minutes (int) – number of minutes to wait

seconds (int) – number of seconds to wait

start_date (datetime|str) – starting point for the interval calculation

end_date (datetime|str) – latest possible date/time to trigger on

timezone (datetime.tzinfo|str) – time zone to use for the date/time calculations


3.1.3 定时任务 - cron

文档地址:点我查看


from datetime import datetime
from apscheduler.schedulers.blocking import BlockingScheduler


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


if __name__ == '__main__':
from datetime import datetime
from apscheduler.schedulers.blocking import BlockingScheduler


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


if __name__ == '__main__':
    scheduler = BlockingScheduler()
    #每周周一到周日的下午17点20分10秒
    #scheduler.add_job(tick, 'cron', day_of_week='*' ,hour='17', minute='20', second='10')

    #每天的下午17点20分10秒
    #scheduler.add_job(tick, 'cron', hour='17', minute='20', second='10')

    #每年的第一周的下午17点20分10秒
    #scheduler.add_job(tick, 'cron', week='1' ,hour='17', minute='20', second='10')

    #每月的第1天的下午17点20分10秒
    #scheduler.add_job(tick, 'cron', day='1' ,hour='17', minute='20', second='10')

    #每月的第1天的下午17点20分0-59秒全部都会执行
    #scheduler.add_job(tick, 'cron', day='1' ,hour='17', minute='20', second='*')
    
    scheduler.start()

year (int|str) – 4-digit year

month (int|str) – month (1-12)

day (int|str) – day of the (1-31)

week (int|str) – ISO week (1-53)

day_of_week (int|str) – number or name of weekday (0-6 or mon,tue,wed,thu,fri,sat,sun)

hour (int|str) – hour (0-23)

minute (int|str) – minute (0-59)

second (int|str) – second (0-59)

start_date (datetime|str) – earliest possible date/time to trigger on (inclusive)

end_date (datetime|str) – latest possible date/time to trigger on (inclusive)

timezone (datetime.tzinfo|str) – time zone to use for the date/time calculations (defaults to scheduler timezone)


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
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