Django timed task Python scheduling framework Apscheduler use

 # coding=utf-8 2 "" 3 demonstrates how to use the background scheduler to schedule a job that executes on 3 second 4 int Ervals. 5 "" "6 7 from datetime import datetime 8 Import Time 9 import os10 one from Apscheduler.schedulers.background import back GroundScheduler12 def tick (): print (' tick! The time is:%s '% datetime.now ()) + if __name__ = = ' __main__ ': scheduler = Backgroundscheduler () schedu Ler.add_job (tick, ' interval ', seconds=3) #间隔3秒钟执行一次21 scheduler.start () #这里的调度任务是独立的一个线程22 print (' Press ctrl+{ 0} to exit '. format (' break ' if os.name = = ' nt ' Else ' C ') * try:25 # This was here to simulate application AC             Tivity (which keeps the main thread alive). while true:27 time.sleep (2) #其他任务是独立的线程执行28 Print (' sleep! ') Except (keyboardinterrupt, systemexit): no strictly necessary if Daemonic mode is enabled but should b E done if possible31 scheduler.shutdown () print(' Exit the job! ') 

Non-blocking scheduling, executed once at a specified time

 1 # coding=utf-8 2 "" "3 demonstrates how to use the background scheduler to schedule a job that executes on 3 second 4 I Ntervals. 5 "" "6 7 from datetime import datetime 8 Import Time 9 import os10 one from Apscheduler.schedulers.background import back GroundScheduler12 def tick (): print (' tick! The time is:%s '% datetime.now ()) if __name__ = = ' __main__ ': scheduler = Backgroundscheduler () #sched Uler.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, only Executes a scheduler.start () #这里的调度任务是独立的一个线程23 print (' press ctrl+{0} to exit '. format (' break ' if os.name = = ' NT ' el         Se ' C ')): try:26 # This is a here-to-simulate application activity (which keeps the main thread alive). 27 While true:28 time.sleep (2) #其他任务是独立的线程执行29 print (' sleep! ') Except (keyboardinterrupt, systemexit): # not strictly necessary if Daemonic mode is enabled BUT should be-done if possible32 scheduler.shutdown () print (' Exit the job! ') 

non-blocking way, using cron execution

 1 # coding=utf-8 2 "" "3 demonstrates how to use the background scheduler to schedule a job that executes on 3 second 4 I Ntervals. 5 "" "6 7 from datetime import datetime 8 Import Time 9 import os10 one from Apscheduler.schedulers.background import back GroundScheduler12 def tick (): print (' tick! The time is:%s '% datetime.now ()) if __name__ = = ' __main__ ': scheduler = Backgroundscheduler () #sched Uler.add_job (tick, ' interval ', seconds=3) #scheduler. add_job (tick, ' date ', run_date= ' 2016-02-14 15:01:05 ') Sch Eduler.add_job (tick, ' cron ', day_of_week= ' 6 ', second= ' */5 ') "(int|str) –4-digit year25 mo         Nth (int|str) –month (1-12) 1-53 Day (int|str) –day of the (1-31) week (int|str)-iso Week () 28  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) 34  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) * All fire on E Very value38 */a any fire every a values, starting from the MINIMUM39 a-b any fire in any Valu         E within the-b range (a must be smaller than b) + a-b/c any fire every C values within the a-d range41 Xth y day fire in the x-th occurrence of weekday y within the MONTH42 last X day fire on the Las    T occurrence of weekday x within the MONTH43 last day fire in the last day within the month44 x, y, Z Any matching expression; Can combine any number of any of the above EXPRESSIONS45 "scheduler.start () #这里的调度任务是独立A thread of print (' press ctrl+{0} to exit '. format (' break ' if os.name = = ' nt ' Else ' C ')) try:50 Here to simulate application activity (which keeps the main thread alive). Wuyi while true:52 time.sleep ( 2) #其他任务是独立的线程执行53 print (' sleep! ') Except (keyboardinterrupt, systemexit): # not strictly necessary if Daemonic mode was enabled but should b E done if possible56 scheduler.shutdown () print (' Exit the job! ')

Blocked way, 3 seconds interval execution

1 # coding=utf-8 2 "" "3 demonstrates how to use the background scheduler to schedule a job that executes on 3 second 4 in Tervals. 5 "" "6  7 from datetime import datetime 8 import OS 9 from apscheduler.schedulers.blocking import Blockingscheduler def tick ():     print (' tick! The time is:%s '% datetime.now ()) if __name__ = = ' __main__ ':     scheduler = Blockingscheduler ()     Schedule R.add_job (tick, ' interval ', seconds=3)     print (' press ctrl+{0} to exit '. format (' break ' if os.name = = ' NT ') Else ' C '))     try:24         scheduler.start ()    #采用的是阻塞的方式, There is only one thread dedicated to the task of scheduling     except (keyboardinterrupt, Systemexit):         strictly necessary if Daemonic mode is enabled but should being done if Possible27         scheduler.s Hutdown ()         Print (' Exit the job! ')

Use a blocking method to perform only once

1 # coding=utf-8 2 "" "3 demonstrates how to use the background scheduler to schedule a job that executes on 3 second 4 in Tervals. 5 "" "6  7 from datetime import datetime 8 import OS 9 from apscheduler.schedulers.blocking import Blockingscheduler def tick ():     print (' tick! The time is:%s '% datetime.now ()) if __name__ = = ' __main__ ':     scheduler = Blockingscheduler ()     Schedule R.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:24         scheduler.start ()    #采用的是阻塞的方式, There is only one thread dedicated to scheduling the task of     except ( keyboardinterrupt, systemexit): $         # not strictly necessary if Daemonic mode was enabled but should was done if possible         scheduler.shutdown ()         print (' Exit the job! ')

Using cron to schedule a blocking approach

 1 # coding=utf-8 2 "" "3 demonstrates how to use the background scheduler to schedule a job that executes on 3 second 4 I Ntervals. 5 "" "6 7 from datetime import datetime 8 import OS 9 from apscheduler.schedulers.blocking import BlockingScheduler11 def tick (): print (' tick! The time is:%s '% datetime.now ()) if __name__ = = ' __main__ ': scheduler = Blockingscheduler () Schedule R.add_job (tick, ' cron ', day_of_week= ' 6 ', second= ' */5 ') "(int|str) –4-digit year22 Month ( Int|str) –month (1-12) (int|str) –day of the (1-31) week (int|str)-iso Week (1-53)-d Ay_of_week (int|str) –number or name of weekday (0-6 or Mon,tue,wed,thu,fri,sat,sun) hour (int|str) –hour (0-2 3) 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) all fire on every value35 * * A any fire every a values, starting from the MINIMUM36 a-b any fire in any value within the-a range (a must be smaller than B) PNs a-b/c any fire every C values within the A-a range38 xth y day Fi  Re on the x-th occurrence of weekday y within the month39 last X day fire in the last occurrence of weekday x within the MONTH40 last day fire on the last day within the Month41 z/y Atching expression; Can combine any number of any of the the above Expressions42 "" on the "" press ctrl+{0} to exit ". format (' break ' If Os.name = = ' nt ' Else ' C ') (try:47 scheduler.start () #采用的是阻塞的方式, only one thread dedicated to scheduling tasks except (keybo ArdInterrupt, systemexit): $ # Not strictly necessary if Daemonic mode was enabled but should are done if possible50 Scheduler.shutdown () Print (' Exit the job! ')

Django timed task Python scheduling framework Apscheduler use