Detail python scheduling framework APScheduler use

Recently, I was on the way to study the use of python scheduling framework APScheduler, so today is also 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)　　# interval 3 Seconds to perform 1 time 
  scheduler.start()  # The scheduling task here is independent 1 A thread 
  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)  # Other tasks are executed in separate threads 
      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 schedule, executed once at the 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')　　# At the specified time, only execute 1 time 
  scheduler.start()  # The scheduling task here is independent 1 A thread 
  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)  # Other tasks are executed in separate threads 
      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 mode, which is executed in cron mode

# 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()  # The scheduling task here is independent 1 A thread 
  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)  # Other tasks are executed in separate threads 
      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!')

Block mode, execute 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()  # It's blocking. It's only blocking 1 Threads are dedicated to scheduling tasks 
  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 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()  # It's blocking. It's only blocking 1 Threads are dedicated to scheduling tasks 
  except (KeyboardInterrupt, SystemExit):
    # Not strictly necessary if daemonic mode is enabled but should be done if possible
    scheduler.shutdown()
    print('Exit The Job!')

Block mode, cron scheduling method is used

# 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()  # It's blocking. It's only blocking 1 Threads are dedicated to scheduling tasks 
  except (KeyboardInterrupt, SystemExit):
    # Not strictly necessary if daemonic mode is enabled but should be done if possible
    scheduler.shutdown()
    print('Exit The Job!')