Update a QGraphicsScene every x seconds automatically

[Nezgal]

Hello.

Here is what I want to do:
I have a QGraphicsScene containing a grid. I have a function updateGrid. I have a button step that updates manually the grid.
I want to make a button play that automatically updates the grid every n seconds.
I tried using Python sched but it seems to work fine to print in the console every n seconds, but when I set it up to update the grid, the whole application freezes and I must force it to quit.

Here is the code:

def play(self) :
	self.play = True
	s = sched.scheduler(time.time, time.sleep)
	s.enter(1, 1, self.playRec, (s,))
	s.run()
 
 
def playRec(self, sc) :
	if self.play :
		self.updateGrid()
		print "blah"
    	    	sc.enter(5, 1, self.playRec, (sc,))

def play(self) :
	self.play = True
	s = sched.scheduler(time.time, time.sleep)
	s.enter(1, 1, self.playRec, (s,))
	s.run()


def playRec(self, sc) :
	if self.play :
		self.updateGrid()
		print "blah"
    	    	sc.enter(5, 1, self.playRec, (sc,))

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How can I do this?

Thank you very much!