python定时执行任务

from apscheduler.scheduler import Scheduler 
import datetime 
 
# Start the scheduler 
sched = Scheduler() 
 
 
def job_function(): 
    print "Hello World"  , ‘start job1 at: ‘, datetime.datetime.now()
def job_f(): 
    print "Hello World"  , ‘start job2 at: ‘, datetime.datetime.now()
print ‘start to sleep‘ 
print ‘wake‘ 
print datetime.datetime.now()
sched.daemonic = False 
sched.add_cron_job(job_function,day_of_week=‘5‘, hour=‘19‘, minute=‘1‘,second=‘1‘) 
sched.add_cron_job(job_f,day_of_week=‘5‘, hour=‘20‘, minute=‘1‘,second=‘1‘) 
sched.start()