python调度框架APScheduler使用详解

 # 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='', 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='', 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!')