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/test/test_format.py

@@ -199,7 +199,7 @@ if verbose:
 def test_exc(formatstr, args, exception, excmsg):
     try:
         testformat(formatstr, args)
-    except exception, exc:
+    except exception as exc:
         if str(exc) == excmsg:
             if verbose:
                 print "yes"