matplotlib-users Mailing List for matplotlib

Hello,
I have a Qt4 application with dynamic embedded matplotlib plotting.
The application allows the user to add and remove lines from the plot.
This all works well, but I have found that updating the legend is
causing a memory leak. What is the proper way to update the legend in
an animated/dynamic context? The attached stand alone example
exemplifies the problem. On my system, with matplotlib.__version__
'1.0.0' compiled from SVN, the memory slowly increases as the script
runs. This does not happen if I remove the ax.legend() call. The del
ax.legend_ line seems to have no effect. I tried finding the artists
associated with the legend What's the appropriate way to update the
legend to avoid this behavior? I just found ax.legend_.remove() but it
raises NotImplementedError

Thanks,
Glenn

On Mon, Sep 6, 2010 at 3:28 PM, Michele De Stefano
<mic...@gm...> wrote:
> I think the answer is yes (at least for me). A behavior like the one
> of ipyhton is fine.

Thanks for the answer. If anyone agrees or disagrees, I would like to know.
>
> Eric, is DreamPie able to run parallel jobs like IPython or not ?
> If not, are you thinking to support a behavior like that ?
>
> I think it is very useful for trying to run parallel jobs
> interactively, most of all if you want to test MPI programs.

DreamPie doesn't support running parallel jobs. I don't plan to
support such a feature in DreamPie - I actually think it should be the
job of a shell-independent library. The job of the shell would be to
let you interact easily with the library.

Thanks for the feedback!
Noam

Thank you, JJ, this solves my problems.

I have one question to your reply:

Jae-Joon Lee wrote:
> 
> col, leg = "b", "test"
> errorbar([1,2,3], [1,2,1],xerr=[0.1, 0.1, 0.1], yerr=[0.1, 0.1, 0.1],
>          fmt='.',color=col)
> l2, = plot([],[], "+", color=col)
> l2.remove() # remove from the axes
> 
> legend([l2], [leg])
> 

Does it make a difference whether I remove l2 from the axes or not? I can't
see that it is plotting anything at all so I am curious as to what I am
missing here..

Cheers, Karianne
-- 
View this message in context: http://old.nabble.com/legend%3A-changing-the-text-colour-tp29614647p29632843.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

Thank you, JJ, this solves my problems.

I have one question to your reply:

Jae-Joon Lee wrote:
> 
> col, leg = "b", "test"
> errorbar([1,2,3], [1,2,1],xerr=[0.1, 0.1, 0.1], yerr=[0.1, 0.1, 0.1],
>          fmt='.',color=col)
> l2, = plot([],[], "+", color=col)
> l2.remove() # remove from the axes
> 
> legend([l2], [leg])
> 

Does it make a difference whether I remove l2 from the axes or not? I can't
see that it is plotting anything at all so I am curious as to what I am
missing here..

Cheers, Karianne
-- 
View this message in context: http://old.nabble.com/legend%3A-changing-the-text-colour-tp29614647p29632842.html
Sent from the matplotlib - users mailing list archive at Nabble.com.

I think the answer is yes (at least for me). A behavior like the one
of ipyhton is fine.

Eric, is DreamPie able to run parallel jobs like IPython or not ?
If not, are you thinking to support a behavior like that ?

I think it is very useful for trying to run parallel jobs
interactively, most of all if you want to test MPI programs.

2010/9/6 Noam Yorav-Raphael <noa...@gm...>:
> The intended audience of IPython and DreamPie is, I think, quite
> similar. Perhaps DreamPie is more suitable for less computer-savvy
> people, as it is a GUI application and not a terminal-based one.
>
> I've seen that "ipython --pylab" goes to interactive mode by default,
> and has a %run command which runs scripts in non-interactive mode.
> Will a behavior like this be fine?
>
> Thanks,
> Noam
>
>
>
>
> On Fri, Sep 3, 2010 at 10:17 AM, Eric Firing <ef...@ha...> wrote:
>>
>> On 09/02/2010 07:47 PM, Noam Yorav-Raphael wrote:
>> > Hello,
>> >
>> > I'm the developer of DreamPie, a new graphical Python shell (you can
>> > check it out at http://dreampie.sourceforge.net )
>> >
>> > I worked to make it work nicely with matplotlib -- it runs Tk/GTK/Qt
>> > event loops when idle, so if matplotlib is in interactive mode it
>> > works great. I even made DreamPie check if matplotlib in
>> > non-interactive mode is present, and if so it shows you a message
>> > suggesting that you switch to interactive mode.
>> >
>> > Lately I thought that it may be much easier for users if DreamPie
>> > would just switch matplotlib to interactive mode automatically.
>> > However, I'm not entirely comfortable with the idea of changing
>> > settings silently.
>> >
>> > I wanted to ask: what do you think? Are there any cases when you want
>> > to have matplotlib in non-interactive mode in a shell?
>>
>> At least with ipython, yes--the point of non-interactive mode is that
>> the show() function blocks, so it can be used in scripts in which the
>> user is supposed to see a plot, dismiss the window, see another plot,
>> etc. Again, at least with ipython, one wants to be *able* to run scripts
>> exactly as they would run from the command line.
>>
>> Whether this sort of thing matters for DreamPie depends on the intended
>> uses and users.
>>
>> Eric
>>
>> >
>> > Also, are there any other ways in which DreamPie can be made more
>> > matplotlib-friendly?
>> >
>> > Thanks,
>> > Noam
>> >
>> > ------------------------------------------------------------------------------
>> > This SF.net Dev2Dev email is sponsored by:
>> >
>> > Show off your parallel programming skills.
>> > Enter the Intel(R) Threading Challenge 2010.
>> > http://p.sf.net/sfu/intel-thread-sfd
>> > _______________________________________________
>> > Matplotlib-users mailing list
>> > Mat...@li...
>> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>>
>>
>> ------------------------------------------------------------------------------
>> This SF.net Dev2Dev email is sponsored by:
>>
>> Show off your parallel programming skills.
>> Enter the Intel(R) Threading Challenge 2010.
>> http://p.sf.net/sfu/intel-thread-sfd
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>
> ------------------------------------------------------------------------------
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>
> Show off your parallel programming skills.
> Enter the Intel(R) Threading Challenge 2010.
> http://p.sf.net/sfu/intel-thread-sfd
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>



-- 
Michele De Stefano
http://www.linkedin.com/in/micdestefano
http://code.google.com/p/mds-utils
http://micheledestefano.xoom.it

The intended audience of IPython and DreamPie is, I think, quite
similar. Perhaps DreamPie is more suitable for less computer-savvy
people, as it is a GUI application and not a terminal-based one.

I've seen that "ipython --pylab" goes to interactive mode by default,
and has a %run command which runs scripts in non-interactive mode.
Will a behavior like this be fine?

Thanks,
Noam




On Fri, Sep 3, 2010 at 10:17 AM, Eric Firing <ef...@ha...> wrote:
>
> On 09/02/2010 07:47 PM, Noam Yorav-Raphael wrote:
> > Hello,
> >
> > I'm the developer of DreamPie, a new graphical Python shell (you can
> > check it out at http://dreampie.sourceforge.net )
> >
> > I worked to make it work nicely with matplotlib -- it runs Tk/GTK/Qt
> > event loops when idle, so if matplotlib is in interactive mode it
> > works great. I even made DreamPie check if matplotlib in
> > non-interactive mode is present, and if so it shows you a message
> > suggesting that you switch to interactive mode.
> >
> > Lately I thought that it may be much easier for users if DreamPie
> > would just switch matplotlib to interactive mode automatically.
> > However, I'm not entirely comfortable with the idea of changing
> > settings silently.
> >
> > I wanted to ask: what do you think? Are there any cases when you want
> > to have matplotlib in non-interactive mode in a shell?
>
> At least with ipython, yes--the point of non-interactive mode is that
> the show() function blocks, so it can be used in scripts in which the
> user is supposed to see a plot, dismiss the window, see another plot,
> etc. Again, at least with ipython, one wants to be *able* to run scripts
> exactly as they would run from the command line.
>
> Whether this sort of thing matters for DreamPie depends on the intended
> uses and users.
>
> Eric
>
> >
> > Also, are there any other ways in which DreamPie can be made more
> > matplotlib-friendly?
> >
> > Thanks,
> > Noam
> >
> > ------------------------------------------------------------------------------
> > This SF.net Dev2Dev email is sponsored by:
> >
> > Show off your parallel programming skills.
> > Enter the Intel(R) Threading Challenge 2010.
> > http://p.sf.net/sfu/intel-thread-sfd
> > _______________________________________________
> > Matplotlib-users mailing list
> > Mat...@li...
> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>
> ------------------------------------------------------------------------------
> This SF.net Dev2Dev email is sponsored by:
>
> Show off your parallel programming skills.
> Enter the Intel(R) Threading Challenge 2010.
> http://p.sf.net/sfu/intel-thread-sfd
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users