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/Lib/xml/sax/expatreader.py b/Lib/xml/sax/expatreader.py
index bb9c294..c4fb930 100644
--- a/Lib/xml/sax/expatreader.py
+++ b/Lib/xml/sax/expatreader.py
@@ -205,7 +205,7 @@
             # document. When feeding chunks, they are not normally final -
             # except when invoked from close.
             self._parser.Parse(data, isFinal)
-        except expat.error, e:
+        except expat.error as e:
             exc = SAXParseException(expat.ErrorString(e.code), e, self)
             # FIXME: when to invoke error()?
             self._err_handler.fatalError(exc)