Plotting with WxAgg backend hangs

Community matplotlib-users
1

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

2

I don’t know of any reason why one shouldn’t be able to use the wxAgg backend interactively.
This looks like a bug to me. Would you mind adding this as an issue on the github issue tracker?

Thanks,

···

On 11 March 2013 19:06, Brendan Barnwell <brenbarn@…1219…> wrote:

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

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