这里有新鲜出炉的 Python3 Cookbook 中文版,程序狗速度看过来!
Python 是一种面向对象、解释型计算机程序设计语言,由 Guido van Rossum 于 1989 年底发明,第一个公开发行版发行于 1991 年。Python 语法简洁而清晰,具有丰富和强大的类库。它常被昵称为胶水语言,它能够把用其他语言制作的各种模块(尤其是 C/C++)很轻松地联结在一起。
本篇文章主要介绍了详解 python 调度框架 APScheduler 使用,小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看看吧
最近在研究 python 调度框架 APScheduler 使用的路上,那么今天也算个学习笔记吧!
- # coding=utf-8
- """
- Demonstrates how to use the background scheduler to schedule a job that executes on 3 second
- intervals.
- """
- from datetime import datetime
- import time
- import os
- from apscheduler.schedulers.background import BackgroundScheduler
- def tick():
- print('Tick! The time is: %s' % datetime.now())
- if __name__ == '__main__':
- scheduler = BackgroundScheduler()
- scheduler.add_job(tick, 'interval', seconds=3)#间隔3秒钟执行一次
- scheduler.start() #这里的调度任务是独立的一个线程
- print('Press Ctrl+{0} to exit'.format('Break' if os.name == 'nt' else 'C'))
- try:
- # This is here to simulate application activity (which keeps the main thread alive).
- while True:
- time.sleep(2) #其他任务是独立的线程执行
- print('sleep!')
- except (KeyboardInterrupt, SystemExit):
- # Not strictly necessary if daemonic mode is enabled but should be done if possible
- scheduler.shutdown()
- print('Exit The Job!')
非阻塞调度,在指定的时间执行一次
- # coding=utf-8
- """
- Demonstrates how to use the background scheduler to schedule a job that executes on 3 second
- intervals.
- """
- from datetime import datetime
- import time
- import os
- from apscheduler.schedulers.background import BackgroundScheduler
- def tick():
- print('Tick! The time is: %s' % datetime.now())
- if __name__ == '__main__':
- scheduler = BackgroundScheduler()
- #scheduler.add_job(tick, 'interval', seconds=3)
- scheduler.add_job(tick, 'date', run_date='2016-02-14 15:01:05')#在指定的时间,只执行一次
- scheduler.start() #这里的调度任务是独立的一个线程
- print('Press Ctrl+{0} to exit'.format('Break' if os.name == 'nt' else 'C'))
- try:
- # This is here to simulate application activity (which keeps the main thread alive).
- while True:
- time.sleep(2) #其他任务是独立的线程执行
- print('sleep!')
- except (KeyboardInterrupt, SystemExit):
- # Not strictly necessary if daemonic mode is enabled but should be done if possible
- scheduler.shutdown()
- print('Exit The Job!')
非阻塞的方式,采用 cron 的方式执行
- # coding=utf-8
- """
- Demonstrates how to use the background scheduler to schedule a job that executes on 3 second
- intervals.
- """
- from datetime import datetime
- import time
- import os
- from apscheduler.schedulers.background import BackgroundScheduler
- def tick():
- print('Tick! The time is: %s' % datetime.now())
- if __name__ == '__main__':
- scheduler = BackgroundScheduler()
- #scheduler.add_job(tick, 'interval', seconds=3)
- #scheduler.add_job(tick, 'date', run_date='2016-02-14 15:01:05')
- scheduler.add_job(tick, 'cron', day_of_week='6', second='*/5')
- '''
- 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)
- * 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
- '''
- scheduler.start() #这里的调度任务是独立的一个线程
- print('Press Ctrl+{0} to exit'.format('Break' if os.name == 'nt' else 'C'))
- try:
- # This is here to simulate application activity (which keeps the main thread alive).
- while True:
- time.sleep(2) #其他任务是独立的线程执行
- print('sleep!')
- except (KeyboardInterrupt, SystemExit):
- # Not strictly necessary if daemonic mode is enabled but should be done if possible
- scheduler.shutdown()
- print('Exit The Job!')
阻塞的方式,间隔 3 秒执行一次
- # coding=utf-8
- """
- Demonstrates how to use the background scheduler to schedule a job that executes on 3 second
- intervals.
- """
- from datetime import datetime
- import os
- 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)
- print('Press Ctrl+{0} to exit'.format('Break' if os.name == 'nt' else 'C'))
- try:
- scheduler.start() #采用的是阻塞的方式,只有一个线程专职做调度的任务
- except (KeyboardInterrupt, SystemExit):
- # Not strictly necessary if daemonic mode is enabled but should be done if possible
- scheduler.shutdown()
- print('Exit The Job!')
采用阻塞的方法,只执行一次
- # coding=utf-8
- """
- Demonstrates how to use the background scheduler to schedule a job that executes on 3 second
- intervals.
- """
- from datetime import datetime
- import os
- 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, 'date', run_date='2016-02-14 15:23:05')
- print('Press Ctrl+{0} to exit'.format('Break' if os.name == 'nt' else 'C'))
- try:
- scheduler.start() #采用的是阻塞的方式,只有一个线程专职做调度的任务
- except (KeyboardInterrupt, SystemExit):
- # Not strictly necessary if daemonic mode is enabled but should be done if possible
- scheduler.shutdown()
- print('Exit The Job!')
采用阻塞的方式,使用 cron 的调度方法
- # coding=utf-8
- """
- Demonstrates how to use the background scheduler to schedule a job that executes on 3 second
- intervals.
- """
- from datetime import datetime
- import os
- 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, 'cron', day_of_week='6', second='*/5')
- '''
- 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)
- * 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
- '''
- print('Press Ctrl+{0} to exit'.format('Break' if os.name == 'nt' else 'C'))
- try:
- scheduler.start() #采用的是阻塞的方式,只有一个线程专职做调度的任务
- except (KeyboardInterrupt, SystemExit):
- # Not strictly necessary if daemonic mode is enabled but should be done if possible
- scheduler.shutdown()
- print('Exit The Job!')
来源: http://www.phperz.com/article/17/0503/332926.html