wxPython import error

Question

I'm having trouble figuring out an error message in Python.

yesterday, I've installed python using the latest EPD package, and wxPython2.9 using the wxPython2.9-osx-cocoa-py2.7 package for Mac OS. I then added wx to my PYTHONPATH.

export WXDIR=/usr/local/lib/wxPython-2.9.1.1/lib/python2.7/site-packages/wx-2.9.1-osx_cocoa
export PYTHONPATH=$WXDIR
export PYTHONPATH=$PYTHONPATH:$WXDIR/tools

but when I try to run stuff I get this error:

In [14]: import matplotlib.pyplot
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)

/Users/imrisofer/Documents/third/hddm-read-only/hddm/<ipython console> in <module>()

/Library/Frameworks/EPD64.framework/Versions/7.0/lib/python2.7/site-packages/matplotlib/pyplot.py in <module>()
     93 
     94 from matplotlib.backends import pylab_setup
---> 95 new_figure_manager, draw_if_interactive, show = pylab_setup()
     96 
     97 @docstring.copy_dedent(Artist.findobj)

/Library/Frameworks/EPD64.framework/Versions/7.0/lib/python2.7/site-packages/matplotlib/backends/__init__.py in pylab_setup()
     23         backend_name = 'matplotlib.backends.%s'%backend_name.lower()
     24     backend_mod = __import__(backend_name,
---> 25                              globals(),locals(),[backend_name])
     26 
     27     # Things we pull in from all backends


/Library/Frameworks/EPD64.framework/Versions/7.0/lib/python2.7/site-packages/matplotlib/backends/backend_wxagg.py in <module>()
     21 
     22 from backend_agg import FigureCanvasAgg
---> 23 import backend_wx    # already uses wxversion.ensureMinimal('2.8')
     24 from backend_wx import FigureManager, FigureManagerWx, FigureCanvasWx, \
     25     FigureFrameWx, DEBUG_MSG, NavigationToolbar2Wx, error_msg_wx, \

/Library/Frameworks/EPD64.framework/Versions/7.0/lib/python2.7/site-packages/matplotlib/backends/backend_wx.py in <module>()
     43         import wxversion
     44     except ImportError:
---> 45         raise ImportError(missingwx)
     46 
     47     # Some early versions of wxversion lack AlreadyImportedError.


ImportError: Matplotlib backend_wx and backend_wxagg require wxPython >=2.8

I can successfully import wx, so I don't no what's the problem. Am I missing anything in the PYTHONPATH?

Chad · Accepted Answer · 2012-05-22 18:00:17Z

15

In Ubuntu 12.04, this problem can be solved by running the command

sudo apt-get install libjpeg62

I realize this may not be useful here, but I wanted to document it somewhere on teh interwebz so I can find it when I run into this problem again myself which will undoubtedly happen.

answered May 22, 2012 at 18:00

Chad

1,5301 gold badge17 silver badges32 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

DrSAR Over a year ago

problem encountered on 12.04 with EPD 7.3 and solved by the above. well done @Chad

Chad Over a year ago

I've actually switched to Fedora and encountered similar problems with libpng... The EPD error description consistently does a good job of explaining what package (or lack of package) is causing the problem.

Jie Fu · Accepted Answer · 2014-01-25 16:55:51Z

5

I'm using Ubuntu 13.10, Canopy 1.2, and PyCharm 3.0.2. When trying to use matlablib, it always complains "Matplotlib backend_wx and backend_wxagg require wxPython >=2.8".Pretty sure that I'm using wxPython 2.8. Then I tried all the methods described in this page, but neither of them works for me.

It turns out that it can be solved by modifying matplotlibrc file. There is a line:

backend : WXAgg

In fact we can change the backend to whatever we like, and I change it to TKAgg, which works just fine for me.

answered Jan 25, 2014 at 16:55

Jie Fu

511 silver badge3 bronze badges

3 Comments

alexgophermix Over a year ago

Can you elaborate on this solution? I also have Ubuntu 13.10 and have the error: ImportError: Matplotlib backend_wx and backend_wxagg require wxPython >=2.8. According to Canopy I have wxPython 2.8.10.1-3 installed. Note: The code I was executing was working when I had the same version of Enthought installed on Ubuntu 12.04. Note: I also found this support message about the error: support.enthought.com/entries/22601196-wxPython

alexgophermix Over a year ago

Ah do you mean the following file: /home/YOU/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/mpl-data/matplotlibrc? This appears to be working so far. Are there any other issues I might experience due to switching the backend?

Jie Fu Over a year ago

Hi alexgophermix, I haven't experienced other issues so far.

ravihansa3000 · Accepted Answer · 2011-04-22 15:28:38Z

4

Select your wx version before importing any wx modules

import wxversion
wxversion.select('2.8')

The above code should come before import wx

answered Apr 22, 2011 at 15:28

ravihansa3000

615 bronze badges

Comments

Lee Kamentsky · Accepted Answer · 2013-05-10 13:40:57Z

4

This happened to me on a Windows x64 installation that did not install wxversion.py in the site-packages directory (c:\Python27\Lib\site-packages by default).

You can get a copy of wxversion.py from the WX svn repository: http://svn.wxwidgets.org/viewvc/wx/wxPython/trunk/wxversion/wxversion.py?content-type=text%2Fplain&view=co

answered May 10, 2013 at 13:40

Lee Kamentsky

6415 silver badges6 bronze badges

Comments

Kun · Accepted Answer · 2014-10-18 13:48:35Z

2

this link helped me https://support.enthought.com/entries/22601196-wxPython-2-8-and-2-9

Here's how I fixed the problem, which I hope will be useful for others in future

In Terminal: gedit Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/mpl-data/matplotlibrc
Edit the line "backend : WXAgg" into "backend : QtAgg"
Save and exit

answered Oct 18, 2014 at 13:48

Kun

991 silver badge5 bronze badges

1 Comment

Ghita Over a year ago

Yeap, it seems that QtAgg backend for matplotlib exists

mbauman · Accepted Answer · 2012-05-22 01:11:39Z

1

I just ran into this myself. One potential cause of this (quite unhelpful) error message is if you installed wx as a single-version installation (INSTALL_MULTIVERSION=0 when running setup.py). In this case, the module wxversion does not get built (or installed) and as such matplotlib incorrectly assumes that all of wx is missing.

This currently is the default setting in installations by the homebrew version of wxWidgets (wxmac) with the option --python.

In your case (albeit a year and a half late), you'd need to ensure that wxversion.py exists within /usr/local/lib/wxPython-2.9.1.1/lib/python2.7/site-packages/. If it doesn't, you'd need to recompile wx with the above flag set. Otherwise you just need to set your $PYTHONPATH such that it includes the base site-packages directory, too:

export WXDIR=/usr/local/lib/wxPython-2.9.1.1/lib/python2.7/site-packages
export PYTHONPATH=$WXDIR:$WXDIR/wx-2.9.1-osx_cocoa:$WXDIR/wx-2.9.1-osx_cocoa/tools

edited May 22, 2012 at 1:11

answered May 18, 2012 at 23:03

mbauman

31.4k5 gold badges91 silver badges127 bronze badges

1 Comment

harijay Over a year ago

To have homebrew install wxpython with the multiversion support turned on . You can run command brew edit wxwidgets . Then edit the line where it says INSTALL_MULTIVERSION=0 to INSTALL_MULTIVERSION=1 . Then save the recipe and proceed with the install.

scrax · Accepted Answer · 2012-07-03 04:14:33Z

1

I've solved with this:

defaults write com.apple.versioner.python Prefer-32-Bit -bool yes

answered Jul 3, 2012 at 4:14

scrax

111 bronze badge

Comments

Federico · Accepted Answer · 2013-07-12 16:42:17Z

1

I solved this by setting the backend to MacOSX in ~/.matplotlib/matplotlibrc:

backend : MacOSX

answered Jul 12, 2013 at 16:42

Federico

5765 silver badges21 bronze badges

Comments

Epsilon0 · Accepted Answer · 2014-03-10 14:44:13Z

0

I've solved this on Windows by looking in the site packages folder in the python library. In there, there should be another folder titled site-packages. In this subfolder, there is the wxversion library. If you copy this library into the Lib folder in python, this import error should be averted.

answered Mar 10, 2014 at 14:44

Epsilon0

113 bronze badges

Comments

Tomasz Jakub Rup · Accepted Answer · 2016-08-09 06:09:08Z

0

sudo apt-get install python-wxtools

Install it. Worked for me.

edited Aug 9, 2016 at 6:09

Tomasz Jakub Rup

10.7k7 gold badges52 silver badges49 bronze badges

answered Feb 26, 2016 at 4:49

Kanaga valli

1

Collectives™ on Stack Overflow

wxPython import error

10 Answers 10

2 Comments

3 Comments

Comments

Comments

1 Comment

1 Comment

Comments

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

10 Answers 10

2 Comments

3 Comments

Comments

Comments

1 Comment

1 Comment

Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related