A detailed example of the Python dispatch framework Apscheduler use

This article mainly introduces the detailed Python scheduling framework Apscheduler use, small series feel very good, and now share to everyone, but also for everyone to do a reference. Let's take a look at it with a little knitting.

Recently in the study of Python scheduling framework Apscheduler use of the road, then today is a study notes it!

# Coding=utf-8 "" "demonstrates how to use the background scheduler to schedule a job that executes on 3 secondintervals." "From datetime import datetimeimport timeimport osfrom apscheduler.schedulers.background Import backgroundschedulerdef 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 the here to    simulate application activity (which Kee PS 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 was enabled but should being done if PO Ssible    scheduler.shutdown ()    print (' Exit the job! ')

Non-blocking scheduling, executed once at a specified time

# coding=utf-8 "" "demonstrates how to use the background scheduler to schedule a job that executes O N 3 secondintervals. "" " From datetime import datetimeimport timeimport osfrom apscheduler.schedulers.background Import backgroundschedulerdef 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, execute only once 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 T    o 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 was enabled but should being done if poss Ible Scheduler.shutdown () print (' Exit the job! ') 

Non-blocking, cron-style execution

# Coding=utf-8 "" "demonstrates how to use the background scheduler to schedule a job that executes on 3 secondintervals." "From datetime import datetimeimport timeimport osfrom apscheduler.schedulers.background Import backgroundschedulerdef 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) –sec Ond (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 CALCU Lations (defaults to scheduler timezone) * All fire in every value */a any fire every a values, starting from The minimum-A-a-a-fire in any value within the-a-range (a must be smaller than B) a-b/c all fire every C Val  UEs within the A-B range xth y day fire on the x-th occurrence of weekday y within the month last X  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 the 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 was enabled but should being done if possible scheduler.shut Down () print (' Exit the job! ')

Blocked way, 3 seconds interval execution

# Coding=utf-8 "" "demonstrates how to use the background scheduler to schedule a job that executes on 3 secondintervals." "From datetime import datetimeimport osfrom apscheduler.schedulers.blocking import Blockingschedulerdef 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, only one thread dedicated to scheduling tasks  except (Keyboardinterrupt, Systemexit):    # not strictly Necessary if Daemonic mode is enabled but should are done if possible    scheduler.shutdown ()    print (' Exit the job! ')
  

Use a blocking method to perform only once

# Coding=utf-8 "" "demonstrates how to use the background scheduler to schedule a job that executes on 3 secondintervals." "From datetime import datetimeimport osfrom apscheduler.schedulers.blocking import Blockingschedulerdef 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, with only one thread dedicated to scheduling tasks  except (Keyboardinterrupt, Systemexit):    # strictly necessary if Daemonic mode is enabled but should being done if possible    scheduler.shutdown ()    pri NT (' Exit the job! ')

Using cron to schedule a blocking approach

# Coding=utf-8 "" "demonstrates how to use the background scheduler to schedule a job that executes on 3 secondintervals." "From datetime import datetimeimport osfrom apscheduler.schedulers.blocking import Blockingschedulerdef tick (): Print (' tick! The time is:%s '% DateTime.Now ()) If __name__ = = ' __main__ ': Scheduler = Blockingscheduler () scheduler.add_job (tick, ' CR On ', day_of_week= ' 6 ', second= ' */5 ') "Year" (int|str) –4-digit Year Month (INT|STR) –month (1-12) Day (int|st R) –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 MO N,tue,wed,thu,fri,sat,sun) hour (INT|STR) –hour (0-23) minute (int|str) –minute (0-59) second (INT|STR) –secon D (0-59) start_date (DATETIME|STR) –earliest possible date/time to trigger on (inclusive) end_date (datetime|st R) –latest possible date/time to trigger in (inclusive) timezone (DATETIME.TZINFO|STR) –time zone to use for the date /time Calculations (dEfaults to Scheduler TimeZone) * No fire in every value */a any fire every a values, starting from the Minimu  M-a any fire on any value within the-a-range (a must be smaller than B) a-b/c all 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 in the last Occurrence of weekday x within the month last day fire on the last day within the month x, y, z any fire in any MA Tching 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, only one thread dedicated to scheduling tasks except (Keyboardinterrupt, systemexit): # not S trictly necessary if Daemonic mode is enabled but should are done if possible scheduler.shutdown () print (' Exit the Jo b! ')