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    3. 在给定时间启动功能

      Start a Function at Given Time(在给定时间启动功能)
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                本文介绍了在给定时间启动功能的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                问题描述

                如何在给定时间运行Python中的函数?

                例如:

                run_it_at(func, '2012-07-17 15:50:00')
                

                将在2012-07-17 15:50:00运行函数func

                我尝试了sched.scheduler,但它没有启动我的功能。

                import time as time_module
                scheduler = sched.scheduler(time_module.time, time_module.sleep)
                t = time_module.strptime('2012-07-17 15:50:00', '%Y-%m-%d %H:%M:%S')
                t = time_module.mktime(t)
                scheduler_e = scheduler.enterabs(t, 1, self.update, ())
                

                我能做些什么?

                推荐答案

                从http://docs.python.org/py3k/library/sched.html读取文档:

                此后,我们需要计算出延迟(以秒为单位).

                from datetime import datetime
                now = datetime.now()
                

                然后使用datetime.strptime解析‘2012-07-17 15:50:00’(格式字符串留给您)

                # I'm just creating a datetime in 3 hours... (you'd use output from above)
                from datetime import timedelta
                run_at = now + timedelta(hours=3)
                delay = (run_at - now).total_seconds()
                

                然后可以使用delay传入threading.Timer实例,例如:

                threading.Timer(delay, self.update).start()
                

                这篇关于在给定时间启动功能的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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