Question

我读过有关python sched（任务计划）的信息，它就像一个cron 但我有一个问题：

让我说如果我每隔2小时就调度一次ryn函数，同时我的系统会关闭，然后我再次重启系统...调度程序是否会自动启动并运行后的函数2小时？或者我必须在关闭系统后再次启动它？
做了像deamon一样的工作吗？

Answer 1

对所有三个问题的回答是否。

sched与cron不同。它采用通用计时器或计数器功能和延迟功能，并允许您在特定时间（由通用计时器功能定义的事件）之后安排函数调用。

关闭程序后它不会运行，除非您通过写入文件或数据库来维护状态。这很复杂，使用cron会更好。

sched适用于事件，但不适用于背景。所以，它并不完全是一个守护者，但你可以使用操作系统设备在后台运行该程序。\ / p>

Answer 2

如果是这样的话：
即使在系统重启后这也会工作吗？答案是：NO那么turbogear调度程序如何在cron中使用cronos运行？系统重启后，turbogear中的预定事件也将消失如果我错了，请纠正我。

import time
import sched
import datetime
import threading
import calendar
#from datetime import datetime


class test:

    def __init__(self):
        self.name = ''

    def getSec(self):

        now = datetime.datetime.now()
        print "now - ", now
        currentYear = now.year
        currentMonth = now.month
        currentDay = now.day
        currentHour = now.hour
        currentMinute = now.minute
        currentSecond = now.second
        currentMicroseconds = now.microsecond
        command = "python runbackup.py"
        print "command is - ", command

        print "currentMinute - ", currentMinute
        print "currentSecond - ", currentSecond
        # current time
        a = datetime.datetime(currentYear, currentMonth, currentDay, currentHour, currentMinute, currentSecond, currentMicroseconds)

        last_date_of_current_month = calendar.monthrange(currentYear, currentMonth)[1]
        print "last_date_of_current_month - ", last_date_of_current_month
        b = datetime.datetime(currentYear, currentMonth, int(last_date_of_current_month), 23, 59, 59, 000000)
        #b = datetime.datetime(currentYear, currentMonth, int(29), 18, 29, 00, 000000)
        #print "date time of b is - %s %s " % (18, 29)

        c = b-a
        print "c is - ", c

        time.sleep(1)
        scheduler = sched.scheduler(time.time, time.sleep)
        #scheduler.cancel(e1)
        sec = c.seconds
        print "second -  ", sec
        print "scheduler entered."
        e1 = scheduler.enter(sec, 1, self.getSec, ())
        t = threading.Thread(target=scheduler.run)
        print "thread started."
        print "======================================"
        t.start()

        #scheduler.cancel(e1)
        #print "canceled."

        return True

if __name__=='__main__'  :
    obj = test()
    obj.getSec()

关于python sched调度程序的问题

2 个答案: