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/dis.py

@@ -33,7 +33,7 @@ def dis(x=None):
                 print "Disassembly of %s:" % name
                 try:
                     dis(x1)
-                except TypeError, msg:
+                except TypeError as msg:
                     print "Sorry:", msg
                 print
     elif hasattr(x, 'co_code'):