Run 2to3 over the Demo/ directory to shut up parse errors from 2to3 about lingering print statements.
diff --git a/Demo/tkinter/matt/window-creation-w-location.py b/Demo/tkinter/matt/window-creation-w-location.py
index 9f23bac..af6f876 100644
--- a/Demo/tkinter/matt/window-creation-w-location.py
+++ b/Demo/tkinter/matt/window-creation-w-location.py
@@ -9,9 +9,9 @@
 
 class QuitButton(Button):
     def __init__(self, master, *args, **kwargs):
-        if not kwargs.has_key("text"):
+        if "text" not in kwargs:
             kwargs["text"] = "QUIT"
-        if not kwargs.has_key("command"):
+        if "command" not in kwargs:
             kwargs["command"] = master.quit
         Button.__init__(self, master, *args, **kwargs)