Re: [Matplotlib-users] 2 simple ??: program exit w/graph, update graph real-time

[Robert C. <cim...@nt...>]

Ryan May wrote:
> On Fri, Apr 24, 2009 at 5:52 AM, Esmail <eb...@ho...> wrote:
> 
>> Ryan May wrote:
>>>     Any idea if it's possible to finish a Python program but still have
>> the
>>>     graph showing?
>>>
>>>     FWIW, I'm doing this under Linux.
>>>
>>>
>>> You'd have to run the plotting in a separate process from the
>>> computation.  subprocess would let you do that, assuming you can spin
>>> off a child task that stays alive when the parent exits.  You'd also
>>> need to get the computing process to give new results to the child plot,
>>> maybe using a pipe (which I think subprocess can handle as well.)
>> Thanks Ryan, I have been meaning to explore Python's
>> threading/multi-processing facilities, so this will provide a
>> good excuse to do so :-)  [when I find the time... so much to learn,
>> so little time]
> 
> 
> I was curious, so I cooked up a quick demo using two scripts.  Put them in
> the same directory and run datasource.py.  It's not perfect, and I think the
> use of raw_input() is a little odd, but it works.

Nice! I will try using the subprocess module instead of multiprocessing, 
as your example works for me.

Thanks!
r.