diff --git a/callcontrol/rating/backends/opensips.py b/callcontrol/rating/backends/opensips.py
index 19bfbfc..003bb5f 100644
--- a/callcontrol/rating/backends/opensips.py
+++ b/callcontrol/rating/backends/opensips.py
@@ -1,48 +1,48 @@
 # Copyright (C) 2014 AG Projects. See LICENSE for details.
 #
 import socket
 
 from application.configuration import ConfigSection, ConfigSetting
 from application.system import host
 from application import log
 
 from callcontrol import configuration_filename
 from callcontrol.rating import RatingEngine, RatingEngineAddress
 
 ##
 ## Rating engine configuration
 ##
 
 
 class RatingEngineAddresses(list):
     def __new__(cls, engines):
         engines = engines.split()
         engines = [RatingEngineAddress(engine) for engine in engines]
         return engines
 
 
 class RatingConfig(ConfigSection):
     __cfgfile__ = configuration_filename
     __section__ = 'CDRTool'
     address = ConfigSetting(type=RatingEngineAddresses, value=[])
     timeout = 500
 
 
 class OpensipsBackend(object):
 
     def __init__(self):
         self.connections = []
         if not RatingConfig.address:
             try:
                 RatingConfig.address = RatingEngineAddresses('cdrtool.' + socket.gethostbyaddr(host.default_ip)[0].split('.', 1)[1])
-            except Exception, e:
+            except Exception:
                 log.fatal('Cannot resolve hostname %s' % ('cdrtool.' + socket.gethostbyaddr(host.default_ip)[0].split('.', 1)[1]))
 
         for engine in RatingConfig.address:
             self.connections.append(RatingEngine(engine))
 
     def shutdown(self):
         for connection in self.connections:
             connection.shutdown()