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?

Answer 1

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

backend : MacOSX

Answer 2

Select your wx version before importing any wx modules

import wxversion
wxversion.select('2.8')

The above code should come before import wx