SF patch 1631942 by Collin Winter:

(a) "except E, V" -> "except E as V"
(b) V is now limited to a simple name (local variable)
(c) V is now deleted at the end of the except block

Lib/plat-mac/MiniAEFrame.py

@@ -70,7 +70,7 @@ class MiniApplication:
             msg = "High Level Event: %r %r" % (code(message), code(h | (v<<16)))
             try:
                 AE.AEProcessAppleEvent(event)
-            except AE.Error, err:
+            except AE.Error as err:
                 print 'AE error: ', err
                 print 'in', msg
                 traceback.print_exc()