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_urllib2net.py

@@ -236,7 +236,7 @@ class OtherNetworkTests(unittest.TestCase):
             debug(url)
             try:
                 f = urllib2.urlopen(url, req)
-            except (IOError, socket.error, OSError), err:
+            except (IOError, socket.error, OSError) as err:
                 debug(err)
                 if expected_err:
                     msg = ("Didn't get expected error(s) %s for %s %s, got %s" %