It seems that the following fix is necessary for matplolitb to work
wxPython 2.8.
Index: lib/matplotlib/backends/backend_wx.py
···
===================================================================
--- lib/matplotlib/backends/backend_wx.py (revision 7250)
+++ lib/matplotlib/backends/backend_wx.py (working copy)
@@ -117,7 +117,7 @@
try:
wxversion.ensureMinimal('2.8')
-except wxversion.AlreadyImportedError:
+except wxversion.VersionError()
pass
Cheers,
Gaël