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
diff --git a/Demo/tkinter/guido/mbox.py b/Demo/tkinter/guido/mbox.py
index 3c36d88..47c38b9 100755
--- a/Demo/tkinter/guido/mbox.py
+++ b/Demo/tkinter/guido/mbox.py
@@ -27,7 +27,7 @@
     seq = 'all'
     try:
         opts, args = getopt.getopt(sys.argv[1:], '')
-    except getopt.error, msg:
+    except getopt.error as msg:
         print msg
         sys.exit(2)
     for arg in args: