Repeating Thread Error

Steve Holden steve at holdenweb.com
Sat Jul 7 02:18:23 CEST 2007


Jonathan Shan wrote:
> Hello,
> 
> I am trying to call a function every 5 seconds. My understanding of
> time.sleep() is during the sleep time everything "stops". However, in
> my application, there are background processes that must be running
> continuously during the five second interval. Thus, threading.Timer
> seems like a good function. Here is the relevant code:
> 
> # background processes
> t = threading.Timer(5.0, function_name, [arguments])
> while True:
>      # Do background processes run inside while loop?
>      t.start()
> 
> The above code generates an error:
> AssertionError: thread already started
> 
> Any hints on how to fix the error? Also, do background processes run
> inside while loops?
> 
> Thanks in advance,
> Jonathan Shan
> 
Here's a little thread-test program I wrote a few years ago. I hope it 
will explain how threads and sleeps interact.

regards
  Steve
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