Run 2to3 over the Demo/ directory to shut up parse errors from 2to3 about lingering print statements.
diff --git a/Demo/tkinter/matt/slider-demo-1.py b/Demo/tkinter/matt/slider-demo-1.py
index db6114b..5662db9 100644
--- a/Demo/tkinter/matt/slider-demo-1.py
+++ b/Demo/tkinter/matt/slider-demo-1.py
@@ -5,7 +5,7 @@
 
 class Test(Frame):
     def print_value(self, val):
-        print "slider now at", val
+        print("slider now at", val)
 
     def reset(self):
         self.slider.set(0)