[Matplotlib-users] Plotting with WxAgg backend hangs

[Brendan B. <bre...@br...>]

	I'm 64-bit Windows 7 with matplotlib 1.2.0 and WxPython 2.8.12.1.  I 
was fiddling around with some of the different backends to see what 
they look like and I found that the WxAgg backend doesn't work:

Python 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit 
(AMD64)] on win
32
Type "help", "copyright", "credits" or "license" for more information.
 >>> import matplotlib as mpl
 >>> mpl.use('WxAgg')
 >>> from matplotlib import pyplot
 >>> pyplot.ion()
 >>> pyplot.plot([1, 2, 3])
[<matplotlib.lines.Line2D object at 0x0000000006757DA0>]
 >>>

	When I do the plot, the figure windows appears, but it's blank 
(without even a proper blank background, just a white area) and 
immediately shows "Not responding".  I have to kill the window, and 
doing so crashes the Python session.  However, it works without the 
"ion()" call: I can then call show() and see the plot fine.

	I have wxPython working fine in other apps.  In fact, what's 
especially odd is that I actually have an app that directly uses 
FigureCanvasWxAgg to embed matplotlib graphs in a GUI, and this seems 
to work fine.  So it seems the problem is somehow in matplotlib's own 
management of the interactive figure window.

	There was a previous question about a similar WxAgg issue on the list 
( 
http://matplotlib.1069221.n5.nabble.com/trouble-with-show-not-drawing-in-interactive-mode-w-WxAgg-td39110.html 
), but there was no real answer: the poster just decided not to use 
WxAgg.  But aren't we really supposed to be able to use WxAgg 
interactively?

Thanks,
-- 
Brendan Barnwell
"Do not follow where the path may lead.  Go, instead, where there is 
no path, and leave a trail."
    --author unknown