Detailed explanation of examples of using framework APScheduler for scheduling in python

This article mainly introduces the detailed use of python scheduling framework APScheduler. The editor thinks it is quite good. Now I will share it with you and give it as a reference. Let’s follow the editor and take a look.

I’ve recently been studying the use of the python scheduling framework APScheduler, so today can be considered a study note!

# 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!')

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 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!')

Non-blocking method, executed using cron

# 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!')

Blocking method, executed once every 3 seconds

# 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!')

Use the blocking method and execute it only once

# 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!')

Use the blocking method and use the cron scheduling method

# 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!')

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