Re: [Matplotlib-users] FigureCanvasQTAgg clean up

[Benjamin R. <ben...@ou...>]

On Tue, Jan 29, 2013 at 5:12 PM, Mads Ipsen <mad...@gm...> wrote:

>  Hi,
>
> I spend some time writing up the question below on Stackoverflow which
> immediately was closed as a duplicate of other posts. To my best knowledge,
> these posts did not answer my questions - so I'll try my luck here instead:
>
> I am using the qt backengine for setting up a QWidget that embeds a
> matplotlib scene. When the widget is closed it appears that many of the
> matplotlib objects that were part of the plot still are alive in Python
> space.
>
> My question is basically the following: What actions should I take to
> clean up the figure and axes objects etc. that were part of the plot
> widget? The qt backend comes with a figure manager, but it appears a little
> unclear how it should be used.
>
> I have attached a small unit test example that sets up a plot. When the
> plot appears, just close it, and the test will garbage collects the plot,
> and then display info of the matplotlib objects that are still alive in
> Python space. Clearly both the path of the plot, and several Bbox objects
> are still referenced.
>
> Our current unit test suite contains almost 10000 GUI tests and its
> imperative that proper object space clean up is done after each test. Any
> help is much appreciated.
>
> Best regards,
>
> Mads
>
>
Would "fig.clf()" do what you need?

Ben Root