最近在研究python調度框架APScheduler使用的路上，那么今天也算個學習筆記吧！

# 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)　　#間隔3秒鐘執行一次  scheduler.start()  #這里的調度任務是獨立的一個線程  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)  #其他任務是獨立的線程執行      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!')

非阻塞調度，在指定的時間執行一次

# 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')　　#在指定的時間，只執行一次  scheduler.start()  #這里的調度任務是獨立的一個線程  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)  #其他任務是獨立的線程執行      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的方式執行

# 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) – 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()  #這里的調度任務是獨立的一個線程  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)  #其他任務是獨立的線程執行      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!')