Run Job every 4 days but first run should happen now

Question

I am trying to setup APScheduler to run every 4 days, but I need the job to start running now. I tried using interval trigger but I discovered it waits the specified period before running. Also I tried using cron the following way:

sched = BlockingScheduler()
sched.add_executor('processpool')

@sched.scheduled_job('cron', day='*/4')
def test():
    print('running')

One final idea I got was using a start_date in the past:

@sched.scheduled_job('interval', seconds=10, start_date=datetime.datetime.now() - datetime.timedelta(hours=4))

but that still waits 10 seconds before running.

score 16 · Accepted Answer · answered Jan 29 '18 at 05:13

16

Try this instead:

@sched.scheduled_job('interval', days=4, next_run_time=datetime.datetime.now())

answered Jan 29 '18 at 05:13

Alex Grönholm

5,563
29
32

it doesn't work, it skips it by a few milliseconds. – MrR Jul 27 '20 at 16:13

score 2 · Answer 2 · answered Sep 05 '19 at 04:30

2

Similar to the above answer, only difference being it uses add_job method.

scheduler = BlockingScheduler()
scheduler.add_job(dump_data, trigger='interval', days=21,next_run_time=datetime.datetime.now())

answered Sep 05 '19 at 04:30

Yogesh Kate

307
3
6

it doesn't work, it skips it by a few milliseconds. – MrR Jul 27 '20 at 16:14
What do you mean by skipping it by a few milliseconds? APScheduler (3.x) has a precision of one second. – Alex Grönholm Jul 28 '20 at 19:12

Run Job every 4 days but first run should happen now

2 Answers2