Using Ao_timer For A Better Sleep

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        A few of my old examples include 'unsafe' use of e32.ao_sleep().
The problem is that the sleep can't be interrupted.
I often use a convenient loop like this

while running:
  // do something
  e32.ao_sleep(1)  # sleep a sec

Now in pys60 1.3.1, it's better to use e32.Ao_timer

timer = e32.Ao_timer()
while running:
  // do something
  timer.after(1)   # sleep a sec

I can then interupt the sleep with 

timer.cancel()

in other part of the program if I need to continue the loop.

For example, I can end the application without waiting for
the last second.    

Tags:
• pys60
• Python
• series60
• Sleep
• timer