new_contents: from apscheduler.schedulers.blocking import BlockingScheduler
  def my_job():
      print 'hello world'
           
  sched = BlockingScheduler()
  sched.add_job(my_job, 'interval', seconds=5)
  sched.start()
  
  
  # one job to refresh every one hour
  # one job to collect the whole data on 58:00 of every day
  # ref: http://debugo.com/apscheduler/
  
subject: add cron rules