There were 2 problems here: one was that the update-alternatives install was plain wrong, and the other was that python-wxgtk2.8 was installing /usr/lib/python2.X/site-packages/wx.pth as a regular file, so the alternatives in python-wxgtk2.6 wasn't working.
I'm fixing the first issue here and re-fixing the second one in python-wxgtk2.8 (see bug #211553)
There were 2 problems here: one was that the update-alternatives install was plain wrong, and the other was that python-wxgtk2.8 was installing /usr/lib/ python2. X/site- packages/ wx.pth as a regular file, so the alternatives in python-wxgtk2.6 wasn't working.
I'm fixing the first issue here and re-fixing the second one in python-wxgtk2.8 (see bug #211553)