apscheduler 如何在完成有限个任务后退出

today = datetime.datetime.now().strf(''%Y-%m-%d'')
scheduler = BlockingScheduler()
scheduler.add_job(job, 'cron', hour = '9-11', minute = '*/5', end_date = day + " 11:35:00", timezone = tz)  
scheduler.start()  
scheduler.shutdown()

用 blockingscheduler 不会返回
用 background, shutdown 又没有阻塞，直接就结束了

job

timezone

cron'

11:35:00

2 条回复 • 2021-09-16 09:56:06 +08:00

eccentric579

2021-09-16 08:56:41 +08:00

睡了一觉，起来有点思路了。
用 blockingscheduler，那么创建一个检查任务完成就触发异常的 job，用 try 捕捉然后 shutdown
或者用 backgroundsheduler，让主进程检查任务完成，未完成就 sleep

感觉有点像是土办法

princelai

2021-09-16 09:56:06 +08:00

我之前写过类似的，和你思路差不多，外部用一个类记录状态并判断

```python
from apscheduler.executors.pool import ThreadPoolExecutor
from apscheduler.jobstores.memory import MemoryJobStore
from apscheduler.schedulers.background import BlockingScheduler
from loguru import logger

class LimitJob:
n = 0

@classmethod
def print_job(cls):
cls.n += 1
logger.info(f"run job {cls.n} times")
if cls.n >= 5:
jobs.shutdown(wait=False)

def init_scheduler() -> BlockingScheduler:
jobstores = {
'default': MemoryJobStore()
}
executors = {
'default': ThreadPoolExecutor(1)
}
job_defaults = {
'coalesce': False,
'max_instances': 1}

scheduler = BlockingScheduler(jobstores=jobstores, executors=executors, job_defaults=job_defaults)
scheduler.add_job(LimitJob.print_job, 'interval', seconds=3, id="print_job")
logger.info("调度任务创建成功")
scheduler.print_jobs()
return scheduler

if __name__ == '__main__':
jobs = init_scheduler()
jobs.start()

```

https://pastebin.ubuntu.com/p/XQMtf4RXgp/