On 9/24/2012 3:32 PM, David Honcik wrote: > I've run into a large memory leak using Matplotlib with PySide and the > Qt4 back end. I'm using : > Python 3.2 > Numpy 1.6.2 > Pyside 1.1.1 (qt474) > Matplotlib 1.2 (first the Capetown Group port to Python 3, then 1.2 RC2) > on Windows XP 32 bit > I've tried using the Python 2.7 branch of all of the above and don't see > the problem. I don't see the problem with the Tk back end. I don't see > the problem with the Qt4 back end and PyQt4. Only with the above > mentioned versions and using the Qt4 back end with PySide. > The following script will reproduce the problem : > -------------------- > import matplotlib > matplotlib.use('Qt4Agg') > matplotlib.rcParams['backend.qt4']='PySide' > import pylab > arrayX = [] > arrayY = [] > for nIndex in range(0, 100): > arrayX.append(nIndex) > arrayY.append(nIndex) > Figure = matplotlib.pyplot.figure(1) > Axes = Figure.add_axes([ 0.05, 0.05, 0.95, 0.95]) > Axes.plot(arrayX, > arrayY, > color = "blue", > marker = "o", > markersize = 5.0) > Axes.set_xlim(arrayX[0], arrayX[len(arrayX) - 1]) > Axes.set_ylim(arrayY[0], arrayY[len(arrayY) - 1]) > matplotlib.pyplot.show() > -------------------- > I run the above, grab the lower right sizing handle on the plot window > and start resizing the window. Watching the python process in task > manager, each resize leaks a noticeable amount of memory. A few minutes > of this will get process memory up to ~2.5 GB. At that point it crashes. > I'm new here, am I in the right place? >
I can reproduce this exactly, also with pyside 1.1.2 and an empty plot. Looks like QtGui.QImage is leaking. import matplotlib matplotlib.use('Qt4Agg') matplotlib.rcParams['backend.qt4']='PySide' from matplotlib import pyplot pyplot.plot() pyplot.show() -- Christoph ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users