Re: [Matplotlib-users] canvas.draw() + pyqt4 memory leak

[Eric F. <ef...@ha...>]

On 06/15/2011 12:13 PM, zb wrote:
> Hi
>
> I have a loop that updates a graph by calling
>
> self.fig.canvas.draw()
>
> But every time it updates the graph, the memory usage goes up. If the
> program runs for one hour, the memory is gone (things start to run slow
> too). I've tried to close() objects but the only thing that brings back
> the ram memory is to close the whole application.
>
> I have read this note in the documentation (but it applies to pyplot):
>
> "If you are making a long sequence of figures, you need to be aware of
> one more thing: the memory requiredfor a figure is not completely
> released until the figure is explicitly closed with close(). Deleting
> all references to the figure, and/or using the window manager to kill
> the window in which the figure appears on the screen, is not enough,
> because pyplot maintains internal references until close() is called."
>
> What could I do in pyqt4 to release the memory?
>
> Thanks

Please provide a simple standalone script that demonstrates the problem.

Eric