用python得知 cron表达式

# coding:utf8
import croniter, datetime
def CronRunNextTimelist(sched, frequency=1):
    now = datetime.datetime.now()
    cron = croniter.croniter(sched, now)
    return [cron.get_next(datetime.datetime).strftime("%Y-%m-%d %H:%M") for i in range(frequency)]
sched = "0 0 8 * *"
print(CronRunNextTimelist(sched,frequency=2))