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/Tools/unicode/listcodecs.py b/Tools/unicode/listcodecs.py
index 19d21e1..c196ced 100644
--- a/Tools/unicode/listcodecs.py
+++ b/Tools/unicode/listcodecs.py
@@ -22,7 +22,7 @@
         except LookupError:
             # Codec not found
             continue
-        except Exception, reason:
+        except Exception as reason:
             # Probably an error from importing the codec; still it's
             # a valid code name
             if _debug: