And since more than one knob will not be changed at a time, I usually use
if/elif/elif/elif structure (since there's no switch in python), ensuring
when the right knob is found, the flow stops. Not sure how much difference
that makes in practice, but, hey, why not.


On Tue, May 7, 2013 at 6:18 PM, Richard Bobo <[email protected]> wrote:

>   OK, my question hasn't shown up in the newsgroups, yet, but I found the
> answer to my question...
>
> I just needed to changed all the if statements (e.g. -- "if a_knob:" ) to
> "if nuke.thisKnob() == a_knob:"
>
> Sorry for the bandwidth!
>
> 8^)
>
>
> Rich
>
>
> Begin forwarded message:
>
> *From: *Richard Bobo <[email protected]>
> *Subject: **knobChanged question...*
> *Date: *May 7, 2013 12:58:05 PM EDT
> *To: *Nuke-Users Mailing List List Postings <
> [email protected]>, Nuke Python discussion <
> [email protected]>
>
> Hi,
>
> This is probably a very elementary question, but I can't quite wrap my
> head around it…
>
> I have a Python_Panel with four knobs on it: three Enumeration_Pulldown
> knobs and a PyScript_Knob. I have added them all to a knobChanged method. I
> am using something like this for my checking:
>
> def knobChanged(self, knob):
> if a_knob:
> set_something = a_knob.value()
> if b_knob:
>  set_something_else = b_knob.value()
> if c_knob:
> set_another_thing = c_knob.value()
>  if d_knob:
> run_a_method()
>
> You will probably notice that each time a knob is changed, all of the
> statements are executed, including the run_a_function(). I'm sure this is
> from "Programming 101", but how do I isolate the knob changed events, so
> that *only* the one that has been changed is executed…?
>
> Thanks for any help!
>
>
> Rich
>
> Rich Bobo
>  Senior VFX Compositor
> Armstrong-White
> http://armstrong-white.com/
>
> Email:  [email protected]
> Mobile:  (248) 840-2665
> Web:  http://richbobo.com/
>
> "We are fallible. We certainly haven't attained perfection. But we can
> strive for it, and the virtue is in the striving."
> - Carlos P. Romulo
>
>
>
>
>
>
>
>
>
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>
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