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/idlelib/SearchEngine.py b/Lib/idlelib/SearchEngine.py
index cc40a00..6745faf 100644
--- a/Lib/idlelib/SearchEngine.py
+++ b/Lib/idlelib/SearchEngine.py
@@ -66,7 +66,7 @@
             flags = flags | re.IGNORECASE
         try:
             prog = re.compile(pat, flags)
-        except re.error, what:
+        except re.error as what:
             try:
                 msg, col = what
             except: