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_cgi.py

@@ -50,7 +50,7 @@ def do_test(buf, method):
         raise ValueError, "unknown method: %s" % method
     try:
         return cgi.parse(fp, env, strict_parsing=1)
-    except StandardError, err:
+    except StandardError as err:
         return ComparableException(err)
 
 # A list of test cases.  Each test case is a a two-tuple that contains