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/threads/telnet.py

@@ -56,7 +56,7 @@ def main():
     #
     try:
         s.connect((host, port))
-    except error, msg:
+    except error as msg:
         sys.stderr.write('connect failed: %r\n' % (msg,))
         sys.exit(1)
     #