Run 2to3 over the Demo/ directory to shut up parse errors from 2to3 about lingering print statements.
diff --git a/Demo/xml/roundtrip.py b/Demo/xml/roundtrip.py
index 8d7d437..b0e131e 100644
--- a/Demo/xml/roundtrip.py
+++ b/Demo/xml/roundtrip.py
@@ -22,7 +22,7 @@
 
     def startElement(self, name, attrs):
         self._out.write('<' + name)
-        for (name, value) in attrs.items():
+        for (name, value) in list(attrs.items()):
             self._out.write(' %s="%s"' % (name, saxutils.escape(value)))
         self._out.write('>')