What is the best way to repeatedly execute a function every x seconds in Python?

I want to repeatedly execute a function in Python every 60 seconds forever (just like an NSTimer in Objective C). This code will run as a daemon and is effectively like calling the python script every minute using a cron, but without requiring that to be set up by the user.

In this question about a cron implemented in Python, the solution appears to effectively just sleep() for x seconds. I don't need such advanced functionality so perhaps something like this would work

while True:
    # Code executed here
    time.sleep(60)

Are there any foreseeable problems with this code?

From stackoverflow

• Use the sched module

  import sched, time
  s = sched.scheduler(time.time, time.sleep)
  def do_something(sc): 
      print "Doing stuff..."
      # do your stuff
      sc.enter(60, 1, do_something, (sc,))
  
  s.enter(60, 1, do_something, (s,))
  s.run()
  

  Baishampayan Ghose : The sched module is for scheduling functions to run after some time, how do you use it to repeat a function call every x seconds without using time.sleep()?

  nosklo : @Baishampayan: Just schedule a new run.

  Alabaster Codify : Kronos, based on sched, offers a higher level interface: http://www.razorvine.net/download/kronos.py Used by TurboGears.

• The main difference between that and cron is that an exception will kill the daemon for good. You might want to wrap with an exception catcher and logger.

• You might want to consider Twisted which is a python networking library that implements the Reactor Pattern.

  from twisted.internet import task
  from twisted.internet import reactor
  
  timeout = 60.0 # Sixty seconds
  
  def doWork():
      #do work here
      pass
  
  l = task.LoopingCall(doWork)
  l.start(timeout) # call every sixty seconds
  
  reactor.run()
  

  While "while True: sleep(60)" will probably work Twisted probably already implements many of the features that you will eventually need (daemonization, logging or exception handling as pointed out by bobince) and will probably be a more robust solution

  Baishampayan Ghose : I knew Twisted could do this. Thanks for sharing the example code!