flow control / get next / filter?

[Ken Godee]

If it was a Python, Errr.... Snake, it would have bit me.

Answer, the "Queue module"



Ken Godee wrote:
> I'm trying to figure out how to get the value of a variable
> that's constantly getting updated, but only get the new
> value, once it has changed.
> 
> I have a module where I register a call back to a function
> in the code I'm working on. This function gets updated continuely.
> ie....
> 
> x = ''
> def myfunc(event)
>     global x
>     x = event
> 
> if you where to do a while loop, you would end up with something like...
> 
> while 1:
>     print x
>     if x == 'stop':
>         break
> 
> 1,1,1,1,1,1,2,2,2,2,2,3,3,3,3,3,
> 
> if you where to do a nested while, you would get....
> 
> while 1:
>     print x
>     while x != x:
>         print x
>         if x == 'stop':
>             break
>     if x == 'stop':
>         break
> 
> 1,2,3,4,5
> 
> but it of coarse just spins the loop and processor loads pegs out.
> 
> If someone could point me in a direction, I'd appreciate it.
> Thanks
> 
> 
>