Remove wx.lib.six and use the stock six module instead,

and add it as an installation dependency.

samples/printing/printing.py

@@ -1,5 +1,5 @@
 import wx
-from wx.lib.six import print_
+from six import print_
 import os
 
 FONTSIZE = 10

samples/roses/clroses.py

@@ -37,7 +37,7 @@
 # independence, override defaults, ignore features, etc.
 
 from math import sin, cos, pi
-from wx.lib.six import print_
+from six import print_
 
 # Rose class knows about:
 # > Generating points and vectors (returning data as a list of points)

samples/roses/wxroses.py

@@ -71,7 +71,7 @@
 import wx
 import clroses
 import wx.lib.colourselect as cs
-from wx.lib.six import print_
+from six import print_
 
 # Class SpinPanel creates a control that includes both a StaticText widget
 # which holds the the name of a parameter and a SpinCtrl widget which

samples/simple/events.py

@@ -1,6 +1,6 @@
 
 import wx
-from wx.lib.six import print_
+from six import print_
 
 print_(wx.version())
 #import os; print_('PID:', os.getpid()); raw_input('Ready to start, press enter...')