Run 2to3 over the Demo/ directory to shut up parse errors from 2to3 about lingering print statements.
diff --git a/Demo/parser/example.py b/Demo/parser/example.py
index 2aa9ec2..c2f0883 100644
--- a/Demo/parser/example.py
+++ b/Demo/parser/example.py
@@ -63,7 +63,7 @@
         return self._name
 
     def get_class_names(self):
-        return self._class_info.keys()
+        return list(self._class_info.keys())
 
     def get_class_info(self, name):
         return self._class_info[name]
@@ -79,7 +79,7 @@
     #  Mixin class providing access to function names and info.
 
     def get_function_names(self):
-        return self._function_info.keys()
+        return list(self._function_info.keys())
 
     def get_function_info(self, name):
         return self._function_info[name]
@@ -97,7 +97,7 @@
         SuiteInfoBase.__init__(self, tree and tree[-1] or None)
 
     def get_method_names(self):
-        return self._function_info.keys()
+        return list(self._function_info.keys())
 
     def get_method_info(self, name):
         return self._function_info[name]