Django-每x秒运行一个函数

对于许多小型项目来说，芹菜实在是太过分了。对于那些项目，您可以使用schedule，它非常易于使用。

使用此库，您可以使任何函数定期执行任务：

import scheduleimport timedef job():    print("I'm working...")schedule.every(10).minutes.do(job)schedule.every().hour.do(job)schedule.every().day.at("10:30").do(job)schedule.every().monday.do(job)schedule.every().wednesday.at("13:15").do(job)while True:    schedule.run_pending()    time.sleep(1)

该示例以阻塞方式运行，但是如果您查看FAQ，您会发现您还可以在并行线程中运行任务，以使您不会阻塞，并且一旦不再需要就删除该任务：

from schedule import Schedulerdef run_continuously(self, interval=1):    """Continuously run, while executing pending jobs at each elapsed    time interval.    @return cease_continuous_run: threading.Event which can be set to    cease continuous run.    Please note that it is *intended behavior that run_continuously()    does not run missed jobs*. For example, if you've registered a job    that should run every minute and you set a continuous run interval    of one hour then your job won't be run 60 times at each interval but    only once.    """    cease_continuous_run = threading.Event()    class ScheduleThread(threading.Thread):        @classmethod        def run(cls): while not cease_continuous_run.is_set():     self.run_pending()     time.sleep(interval)    continuous_thread = ScheduleThread()    continuous_thread.setDaemon(True)    continuous_thread.start()    return cease_continuous_runScheduler.run_continuously = run_continuously

这是在类方法中使用的示例：

    def foo(self):        ...        if some_condition():return schedule.CancelJob  # a job can dequeue it    # can be put in __enter__ or __init__    self._job_stop = self.scheduler.run_continuously()    logger.debug("doing foo"...)    self.foo() # call foo    self.scheduler.every(5).seconds.do(        self.foo) # schedule foo for running every 5 seconds    ...    # later on foo is not needed any more:    self._job_stop.set()    ...    def __exit__(self, exec_type, exc_value, traceback):        # if the jobs are not stop, you can stop them        self._job_stop.set()