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

Demo/tkinter/guido/tkman.py

@@ -216,7 +216,7 @@ def search_string(self, search):
                 prog = re.compile(search, map)
             else:
                 prog = re.compile(search)
-        except re.error, msg:
+        except re.error as msg:
             self.frame.bell()
             print 'Regex error:', msg
             return