Implementing a multivibrator function with python

[unknown]

On Tue, 12 Nov 2013 06:44:05 -0800, JL wrote:

> I am actually running python on raspberry pi. The trigger event is a
> button-press.
> 
> On Monday, November 11, 2013 6:56:03 PM UTC+8, Dave Angel wrote:
>> On Mon, 11 Nov 2013 01:41:58 -0800 (PST), JL <lightaiyee at gmail.com>
>> 
>> wrote:
>> 
>> > - If the event happens again before the 5secs expire, the high
>> 
>> duration will be extended by another 5 secs. This works like a
>> 
>> retriggerable multivibrator for those who are into electronics.
>> 
>> 
>> 
>> More precisely a retriggerable monostable multivibrator.
>> 
>> 
>> 
>> The question makes little sense unless you're running in an event
>> 
>> driven environment, such as a gui. Name the environment and somebody
>> 
>> can probably help.
>> 
>> 
>> 
>> --
>> 
>> DaveA

How critical is the output pulse time?
is it a state that can be polled to regularly & changed if the timeout 
has been exceeded or does it need to switch in the background?

if you need to trigger & switch in the background you will probably need 
to start playing with threads or multiprocessing.

greater detail on what you are trying to achieve project wise may assist 
here