diff --git a/conn_tests/test_pubsubjobs.py b/conn_tests/test_pubsubjobs.py
index edf22cc..ec2a271 100644
--- a/conn_tests/test_pubsubjobs.py
+++ b/conn_tests/test_pubsubjobs.py
@@ -122,14 +122,14 @@ if __name__ == '__main__':
 	logging.basicConfig(level=opts.loglevel, format='%(levelname)-8s %(message)s')
 
 	#load xml config
-	logging.info("Loading config file: %s" % opts.configfile)
+	logging.info("Loading config file: %s" , opts.configfile)
 	config = configparser.RawConfigParser()
 	config.read(opts.configfile)
 	
 	#init
-	logging.info("Account 1 is %s" % config.get('account1', 'jid'))
+	logging.info("Account 1 is %s" , config.get('account1', 'jid'))
 	xmpp1 = TestClient(config.get('account1','jid'), config.get('account1','pass'))
-	logging.info("Account 2 is %s" % config.get('account2', 'jid'))
+	logging.info("Account 2 is %s" , config.get('account2', 'jid'))
 	xmpp2 = TestClient(config.get('account2','jid'), config.get('account2','pass'))
 	
 	xmpp1.registerPlugin('xep_0004')
diff --git a/conn_tests/test_pubsubserver.py b/conn_tests/test_pubsubserver.py
index 15635b4..aae77dd 100644
--- a/conn_tests/test_pubsubserver.py
+++ b/conn_tests/test_pubsubserver.py
@@ -186,14 +186,14 @@ if __name__ == '__main__':
 	logging.basicConfig(level=opts.loglevel, format='%(levelname)-8s %(message)s')
 
 	#load xml config
-	logging.info("Loading config file: %s" % opts.configfile)
+	logging.info("Loading config file: %s" , opts.configfile)
 	config = configparser.RawConfigParser()
 	config.read(opts.configfile)
 	
 	#init
-	logging.info("Account 1 is %s" % config.get('account1', 'jid'))
+	logging.info("Account 1 is %s" , config.get('account1', 'jid'))
 	xmpp1 = TestClient(config.get('account1','jid'), config.get('account1','pass'))
-	logging.info("Account 2 is %s" % config.get('account2', 'jid'))
+	logging.info("Account 2 is %s" , config.get('account2', 'jid'))
 	xmpp2 = TestClient(config.get('account2','jid'), config.get('account2','pass'))
 	
 	xmpp1.registerPlugin('xep_0004')
diff --git a/conn_tests/testpubsub.py b/conn_tests/testpubsub.py
index 3aa7200..0f46524 100755
--- a/conn_tests/testpubsub.py
+++ b/conn_tests/testpubsub.py
@@ -329,11 +329,11 @@ if __name__ == '__main__':
 	logging.basicConfig(level=opts.loglevel, format='%(levelname)-8s %(message)s')
 
 	#load xml config
-	logging.info("Loading config file: %s" % opts.configfile)
+	logging.info("Loading config file: %s" , opts.configfile)
 	config = ET.parse(os.path.expanduser(opts.configfile)).find('auth')
 	
 	#init
-	logging.info("Logging in as %s" % config.attrib['jid'])
+	logging.info("Logging in as %s" , config.attrib['jid'])
 	
 	
 	plugin_config = {}
diff --git a/examples/ping.py b/examples/ping.py
index 68772e6..fcf75a0 100755
--- a/examples/ping.py
+++ b/examples/ping.py
@@ -72,7 +72,7 @@ class PingTest(sleekxmpp.ClientXMPP):
             self.disconnect()
             sys.exit(1)
         else:
-            logging.info("Success! RTT: %s" % str(result))
+            logging.info("Success! RTT: %s" , str(result))
             self.disconnect()
 
 
diff --git a/sleekxmpp/basexmpp.py b/sleekxmpp/basexmpp.py
index 8f11eef..24a7c38 100644
--- a/sleekxmpp/basexmpp.py
+++ b/sleekxmpp/basexmpp.py
@@ -246,7 +246,7 @@ class BaseXMPP(XMLStream):
                 spec = "(RFC-%s) " % self.plugin[plugin].rfc
 
             desc = (spec, self.plugin[plugin].description)
-            log.debug("Loaded Plugin %s%s" % desc)
+            log.debug("Loaded Plugin %s%s" , desc)
         except:
             log.exception("Unable to load plugin: %s", plugin)
 
@@ -282,7 +282,7 @@ class BaseXMPP(XMLStream):
         if key in self.plugin:
             return self.plugin[key]
         else:
-            log.warning("""Plugin "%s" is not loaded.""" % key)
+            log.warning("""Plugin "%s" is not loaded.""" , key)
             return False
 
     def get(self, key, default):
@@ -679,7 +679,7 @@ class BaseXMPP(XMLStream):
 
     def set_jid(self, jid):
         """Rip a JID apart and claim it as our own."""
-        log.debug("setting jid to %s" % jid)
+        log.debug("setting jid to %s" , jid)
         self.boundjid.full = jid
 
     def getjidresource(self, fulljid):
@@ -795,7 +795,7 @@ class BaseXMPP(XMLStream):
             log.warning('You should catch IqError exceptions')
         elif isinstance(exception, IqTimeout):
             iq = exception.iq
-            log.error('Request timed out: %s' % iq)
+            log.error('Request timed out: %s' , iq)
             log.warning('You should catch IqTimeout exceptions')
         else:
             log.exception(exception)
diff --git a/sleekxmpp/clientxmpp.py b/sleekxmpp/clientxmpp.py
index fb3551f..0635472 100644
--- a/sleekxmpp/clientxmpp.py
+++ b/sleekxmpp/clientxmpp.py
@@ -164,7 +164,7 @@ class ClientXMPP(BaseXMPP):
                     address = (answer.target.to_text()[:-1], answer.port)
                     answers.append((address, answer.priority, answer.weight))
             except (dns.resolver.NXDOMAIN, dns.resolver.NoAnswer):
-                log.warning("No SRV records for %s" % domain)
+                log.warning("No SRV records for %s" , domain)
                 answers = super(ClientXMPP, self).get_dns_records(domain, port)
             except dns.exception.Timeout:
                 log.warning("DNS resolution timed out " + \
diff --git a/sleekxmpp/features/feature_bind/bind.py b/sleekxmpp/features/feature_bind/bind.py
index de03192..ac3f447 100644
--- a/sleekxmpp/features/feature_bind/bind.py
+++ b/sleekxmpp/features/feature_bind/bind.py
@@ -42,7 +42,7 @@ class feature_bind(base_plugin):
         Arguments:
             features -- The stream features stanza.
         """
-        log.debug("Requesting resource: %s" % self.xmpp.boundjid.resource)
+        log.debug("Requesting resource: %s" , self.xmpp.boundjid.resource)
         iq = self.xmpp.Iq()
         iq['type'] = 'set'
         iq.enable('bind')
@@ -55,7 +55,7 @@ class feature_bind(base_plugin):
 
         self.xmpp.features.add('bind')
 
-        log.info("Node set to: %s" % self.xmpp.boundjid.full)
+        log.info("Node set to: %s" , self.xmpp.boundjid.full)
 
         if 'session' not in features['features']:
             log.debug("Established Session")
diff --git a/sleekxmpp/features/feature_mechanisms/mechanisms.py b/sleekxmpp/features/feature_mechanisms/mechanisms.py
index a6cff0a..5e5f0cd 100644
--- a/sleekxmpp/features/feature_mechanisms/mechanisms.py
+++ b/sleekxmpp/features/feature_mechanisms/mechanisms.py
@@ -123,7 +123,7 @@ class feature_mechanisms(base_plugin):
 
     def _handle_fail(self, stanza):
         """SASL authentication failed. Disconnect and shutdown."""
-        log.info("Authentication failed: %s" % stanza['condition'])
+        log.info("Authentication failed: %s" , stanza['condition'])
         self.xmpp.event("failed_auth", stanza, direct=True)
         self.xmpp.disconnect()
         return True
diff --git a/sleekxmpp/plugins/gmail_notify.py b/sleekxmpp/plugins/gmail_notify.py
index 9a94a41..f6391ac 100644
--- a/sleekxmpp/plugins/gmail_notify.py
+++ b/sleekxmpp/plugins/gmail_notify.py
@@ -121,7 +121,7 @@ class gmail_notify(base.base_plugin):
     def handle_gmail(self, iq):
         mailbox = iq['mailbox']
         approx = ' approximately' if mailbox['estimated'] else ''
-        log.info('Gmail: Received%s %s emails' % (approx, mailbox['total-matched']))
+        log.info('Gmail: Received%s %s emails' , approx, mailbox['total-matched'])
         self.last_result_time = mailbox['result-time']
         self.xmpp.event('gmail_messages', iq)
 
@@ -140,7 +140,7 @@ class gmail_notify(base.base_plugin):
         if query is None:
             log.info("Gmail: Checking for new emails")
         else:
-            log.info('Gmail: Searching for emails matching: "%s"' % query)
+            log.info('Gmail: Searching for emails matching: "%s"' , query)
         iq = self.xmpp.Iq()
         iq['type'] = 'get'
         iq['to'] = self.xmpp.boundjid.bare
diff --git a/sleekxmpp/plugins/jobs.py b/sleekxmpp/plugins/jobs.py
index 0f1f7fb..5ccfe27 100644
--- a/sleekxmpp/plugins/jobs.py
+++ b/sleekxmpp/plugins/jobs.py
@@ -43,7 +43,7 @@ class jobs(base.base_plugin):
 		iq['psstate']['payload'] = state
 		result = iq.send()
 		if result is None or type(result) == bool or result['type'] != 'result':
-			log.error("Unable to change %s:%s to %s" % (node, jobid, state))
+			log.error("Unable to change %s:%s to %s" , node, jobid, state)
 			return False
 		return True
 
diff --git a/sleekxmpp/plugins/xep_0009/remote.py b/sleekxmpp/plugins/xep_0009/remote.py
index 3cc0f52..6ca42d0 100644
--- a/sleekxmpp/plugins/xep_0009/remote.py
+++ b/sleekxmpp/plugins/xep_0009/remote.py
@@ -20,7 +20,7 @@ log = logging.getLogger(__name__)
 
 def _intercept(method, name, public):
     def _resolver(instance, *args, **kwargs):
-        log.debug("Locally calling %s.%s with arguments %s." % (instance.FQN(), method.__name__, args))
+        log.debug("Locally calling %s.%s with arguments %s." , instance.FQN(), method.__name__, args)
         try:
             value = method(instance, *args, **kwargs)
             if value == NotImplemented:
@@ -381,7 +381,7 @@ class Proxy(Endpoint):
                 try:
                     if attribute._rpc:
                         def _remote_call(*args, **kwargs):
-                            log.debug("Remotely calling '%s.%s' with arguments %s." % (self._endpoint.FQN(), attribute._rpc_name, args))
+                            log.debug("Remotely calling '%s.%s' with arguments %s." , self._endpoint.FQN(), attribute._rpc_name, args)
                             return self._endpoint.session._call_remote(self._endpoint.target_jid, "%s.%s" % (self._endpoint.FQN(), attribute._rpc_name), self._callback, *args, **kwargs)
                         return _remote_call
                 except:
@@ -449,7 +449,7 @@ class RemoteSession(object):
         self._event.wait()
 
     def _notify(self, event):
-        log.debug("RPC Session as %s started." % self._client.boundjid.full)
+        log.debug("RPC Session as %s started." , self._client.boundjid.full)
         self._client.sendPresence()
         self._event.set()
         pass
@@ -461,7 +461,7 @@ class RemoteSession(object):
         if name is None:
             name = method.__name__
         key = "%s.%s" % (endpoint, name)
-        log.debug("Registering call handler for %s (%s)." % (key, method))
+        log.debug("Registering call handler for %s (%s)." , key, method)
         with self._lock:
             if key in self._entries:
                 raise KeyError("A handler for %s has already been regisered!" % endpoint)
@@ -469,7 +469,7 @@ class RemoteSession(object):
         return key
 
     def _register_acl(self, endpoint, acl):
-        log.debug("Registering ACL %s for endpoint %s." % (repr(acl), endpoint))
+        log.debug("Registering ACL %s for endpoint %s." , repr(acl), endpoint)
         with self._lock:
             self._acls[endpoint] = acl
 
@@ -562,7 +562,7 @@ class RemoteSession(object):
             iq.send()
             return future.get_value(30)
         else:
-            log.debug("[RemoteSession] _call_remote %s" % callback)
+            log.debug("[RemoteSession] _call_remote %s" , callback)
             self._register_callback(pid, callback)
             iq.send()
 
@@ -601,11 +601,11 @@ class RemoteSession(object):
             error.send()
         except Exception as e:
             if isinstance(e, KeyError):
-                log.error("No handler available for %s!" % pmethod)
+                log.error("No handler available for %s!" , pmethod)
                 error = self._client.plugin['xep_0009']._item_not_found(iq)
             else:
                 traceback.print_exc(file=sys.stderr)
-                log.error("An unexpected problem occurred invoking method %s!" % pmethod)
+                log.error("An unexpected problem occurred invoking method %s!" , pmethod)
                 error = self._client.plugin['xep_0009']._undefined_condition(iq)
             #! print "[REMOTE.PY] _handle_remote_procedure_call AN ERROR SHOULD BE SENT NOW %s " % e
             error.send()
diff --git a/sleekxmpp/plugins/xep_0009/rpc.py b/sleekxmpp/plugins/xep_0009/rpc.py
index fc306d3..7f15051 100644
--- a/sleekxmpp/plugins/xep_0009/rpc.py
+++ b/sleekxmpp/plugins/xep_0009/rpc.py
@@ -128,22 +128,22 @@ class xep_0009(base.base_plugin):
     def _handle_method_call(self, iq):
         type = iq['type']
         if type == 'set':
-            log.debug("Incoming Jabber-RPC call from %s" % iq['from'])
+            log.debug("Incoming Jabber-RPC call from %s" , iq['from'])
             self.xmpp.event('jabber_rpc_method_call', iq)
         else:
             if type == 'error' and ['rpc_query'] is None:
                 self.handle_error(iq)
             else:
-                log.debug("Incoming Jabber-RPC error from %s" % iq['from'])
+                log.debug("Incoming Jabber-RPC error from %s" , iq['from'])
                 self.xmpp.event('jabber_rpc_error', iq)
 
     def _handle_method_response(self, iq):
         if iq['rpc_query']['method_response']['fault'] is not None:
-            log.debug("Incoming Jabber-RPC fault from %s" % iq['from'])
+            log.debug("Incoming Jabber-RPC fault from %s" , iq['from'])
             #self._on_jabber_rpc_method_fault(iq)
             self.xmpp.event('jabber_rpc_method_fault', iq)
         else:
-            log.debug("Incoming Jabber-RPC response from %s" % iq['from'])
+            log.debug("Incoming Jabber-RPC response from %s" , iq['from'])
             self.xmpp.event('jabber_rpc_method_response', iq)
 
     def _handle_error(self, iq):
diff --git a/sleekxmpp/plugins/xep_0012.py b/sleekxmpp/plugins/xep_0012.py
index 8fe818b..e865cf1 100644
--- a/sleekxmpp/plugins/xep_0012.py
+++ b/sleekxmpp/plugins/xep_0012.py
@@ -71,10 +71,10 @@ class xep_0012(base.base_plugin):
 
     def handle_last_activity_query(self, iq):
         if iq['type'] == 'get':
-            log.debug("Last activity requested by %s" % iq['from'])
+            log.debug("Last activity requested by %s" , iq['from'])
             self.xmpp.event('last_activity_request', iq)
         elif iq['type'] == 'result':
-            log.debug("Last activity result from %s" % iq['from'])
+            log.debug("Last activity result from %s" , iq['from'])
             self.xmpp.event('last_activity', iq)
 
     def handle_last_activity(self, iq):
diff --git a/sleekxmpp/plugins/xep_0045.py b/sleekxmpp/plugins/xep_0045.py
index 45f1611..c037297 100644
--- a/sleekxmpp/plugins/xep_0045.py
+++ b/sleekxmpp/plugins/xep_0045.py
@@ -127,7 +127,7 @@ class xep_0045(base.base_plugin):
     def handle_groupchat_invite(self, inv):
         """ Handle an invite into a muc.
         """
-        logging.debug("MUC invite to %s from %s: %s" % (inv['from'], inv["from"], inv))
+        logging.debug("MUC invite to %s from %s: %s" , inv['from'], inv["from"], inv)
         if inv['from'] not in self.rooms.keys():
             self.xmpp.event("groupchat_invite", inv)
 
@@ -149,7 +149,7 @@ class xep_0045(base.base_plugin):
             if entry['nick'] not in self.rooms[entry['room']]:
                 got_online = True
             self.rooms[entry['room']][entry['nick']] = entry
-        log.debug("MUC presence from %s/%s : %s" % (entry['room'],entry['nick'], entry))
+        log.debug("MUC presence from %s/%s : %s" , entry['room'],entry['nick'], entry)
         self.xmpp.event("groupchat_presence", pr)
         self.xmpp.event("muc::%s::presence" % entry['room'], pr)
         if got_offline:
diff --git a/sleekxmpp/plugins/xep_0050/adhoc.py b/sleekxmpp/plugins/xep_0050/adhoc.py
index 5095f87..7cfaa0e 100644
--- a/sleekxmpp/plugins/xep_0050/adhoc.py
+++ b/sleekxmpp/plugins/xep_0050/adhoc.py
@@ -211,8 +211,7 @@ class xep_0050(base_plugin):
         key = (iq['to'].full, node)
         name, handler = self.commands.get(key, ('Not found', None))
         if not handler:
-            log.debug('Command not found: %s, %s' % (key, self.commands))
-
+            log.debug('Command not found: %s, %s' , key, self.commands)
         initial_session = {'id': sessionid,
                            'from': iq['from'],
                            'to': iq['to'],
diff --git a/sleekxmpp/plugins/xep_0078/legacyauth.py b/sleekxmpp/plugins/xep_0078/legacyauth.py
index edb8f31..4963446 100644
--- a/sleekxmpp/plugins/xep_0078/legacyauth.py
+++ b/sleekxmpp/plugins/xep_0078/legacyauth.py
@@ -60,12 +60,12 @@ class xep_0078(base_plugin):
         try:
             resp = iq.send(now=True)
         except IqError:
-            log.info("Authentication failed: %s" % resp['error']['condition'])
+            log.info("Authentication failed: %s" , resp['error']['condition'])
             self.xmpp.event('failed_auth', direct=True)
             self.xmpp.disconnect()
             return True
         except IqTimeout:
-            log.info("Authentication failed: %s" % 'timeout')
+            log.info("Authentication failed: %s" , 'timeout')
             self.xmpp.event('failed_auth', direct=True)
             self.xmpp.disconnect()
             return True
diff --git a/sleekxmpp/plugins/xep_0085/chat_states.py b/sleekxmpp/plugins/xep_0085/chat_states.py
index 4fb21ba..d0a05cc 100644
--- a/sleekxmpp/plugins/xep_0085/chat_states.py
+++ b/sleekxmpp/plugins/xep_0085/chat_states.py
@@ -45,5 +45,5 @@ class xep_0085(base_plugin):
 
     def _handle_chat_state(self, msg):
         state = msg['chat_state']
-        log.debug("Chat State: %s, %s" % (state, msg['from'].jid))
+        log.debug("Chat State: %s, %s" , state, msg['from'].jid)
         self.xmpp.event('chatstate_%s' % state, msg)
diff --git a/sleekxmpp/plugins/xep_0199/ping.py b/sleekxmpp/plugins/xep_0199/ping.py
index de7f568..f8ae401 100644
--- a/sleekxmpp/plugins/xep_0199/ping.py
+++ b/sleekxmpp/plugins/xep_0199/ping.py
@@ -118,7 +118,7 @@ class xep_0199(base_plugin):
         Arguments:
             iq -- The ping request.
         """
-        log.debug("Pinged by %s" % iq['from'])
+        log.debug("Pinged by %s" , iq['from'])
         iq.reply().send()
 
     def send_ping(self, jid, timeout=None, errorfalse=False,
@@ -141,7 +141,7 @@ class xep_0199(base_plugin):
                           is received. Useful in conjunction with
                           the option block=False.
         """
-        log.debug("Pinging %s" % jid)
+        log.debug("Pinging %s" , jid)
         if timeout is None:
             timeout = self.timeout
 
@@ -167,7 +167,7 @@ class xep_0199(base_plugin):
         if not block:
             return None
 
-        log.debug("Pong: %s %f" % (jid, delay))
+        log.debug("Pong: %s %f" , jid, delay)
         return delay
 
 
diff --git a/sleekxmpp/plugins/xep_0224/attention.py b/sleekxmpp/plugins/xep_0224/attention.py
index 41d7a0f..4c03f6a 100644
--- a/sleekxmpp/plugins/xep_0224/attention.py
+++ b/sleekxmpp/plugins/xep_0224/attention.py
@@ -68,5 +68,5 @@ class xep_0224(base_plugin):
         Arguments:
             msg -- A message stanza with an attention element.
         """
-        log.debug("Received attention request from: %s" % msg['from'])
+        log.debug("Received attention request from: %s" , msg['from'])
         self.xmpp.event('attention', msg)
diff --git a/sleekxmpp/stanza/rootstanza.py b/sleekxmpp/stanza/rootstanza.py
index 470a122..2ac47d8 100644
--- a/sleekxmpp/stanza/rootstanza.py
+++ b/sleekxmpp/stanza/rootstanza.py
@@ -80,8 +80,7 @@ class RootStanza(StanzaBase):
             self['error']['type'] = 'cancel'
             self.send()
             # log the error
-            log.exception('Error handling {%s}%s stanza' %
-                          (self.namespace, self.name))
+            log.exception('Error handling {%s}%s stanza' ,  self.namespace, self.name)
             # Finally raise the exception to a global exception handler
             self.stream.exception(e)
 
diff --git a/sleekxmpp/xmlstream/handler/waiter.py b/sleekxmpp/xmlstream/handler/waiter.py
index 25dc161..c3d0a4e 100644
--- a/sleekxmpp/xmlstream/handler/waiter.py
+++ b/sleekxmpp/xmlstream/handler/waiter.py
@@ -91,7 +91,7 @@ class Waiter(BaseHandler):
             stanza = self._payload.get(True, timeout)
         except queue.Empty:
             stanza = False
-            log.warning("Timed out waiting for %s" % self.name)
+            log.warning("Timed out waiting for %s" , self.name)
         self.stream().remove_handler(self.name)
         return stanza
 
diff --git a/sleekxmpp/xmlstream/matcher/xmlmask.py b/sleekxmpp/xmlstream/matcher/xmlmask.py
index 53ccc9b..cd35043 100644
--- a/sleekxmpp/xmlstream/matcher/xmlmask.py
+++ b/sleekxmpp/xmlstream/matcher/xmlmask.py
@@ -102,8 +102,7 @@ class MatchXMLMask(MatcherBase):
             try:
                 mask = ET.fromstring(mask)
             except ExpatError:
-                log.warning("Expat error: %s\nIn parsing: %s" % ('', mask))
-
+                log.warning("Expat error: %s\nIn parsing: %s" , '', mask)
         if not use_ns:
             # Compare the element without using namespaces.
             source_tag = source.tag.split('}', 1)[-1]
diff --git a/sleekxmpp/xmlstream/xmlstream.py b/sleekxmpp/xmlstream/xmlstream.py
index b6d013b..7b941bf 100644
--- a/sleekxmpp/xmlstream/xmlstream.py
+++ b/sleekxmpp/xmlstream/xmlstream.py
@@ -362,7 +362,7 @@ class XMLStream(object):
         else:
             delay = min(self.reconnect_delay * 2, self.reconnect_max_delay)
             delay = random.normalvariate(delay, delay * 0.1)
-            log.debug('Waiting %s seconds before connecting.' % delay)
+            log.debug('Waiting %s seconds before connecting.' , delay)
             time.sleep(delay)
 
         if self.use_proxy:
@@ -391,7 +391,7 @@ class XMLStream(object):
 
         try:
             if not self.use_proxy:
-                log.debug("Connecting to %s:%s" % self.address)
+                log.debug("Connecting to %s:%s" , self.address)
                 self.socket.connect(self.address)
 
             self.set_socket(self.socket, ignore=True)
@@ -435,18 +435,18 @@ class XMLStream(object):
         headers = '\r\n'.join(headers) + '\r\n\r\n'
 
         try:
-            log.debug("Connecting to proxy: %s:%s" % address)
+            log.debug("Connecting to proxy: %s:%s" , address)
             self.socket.connect(address)
             self.send_raw(headers, now=True)
             resp = ''
             while '\r\n\r\n' not in resp:
                 resp += self.socket.recv(1024).decode('utf-8')
-            log.debug('RECV: %s' % resp)
+            log.debug('RECV: %s' , resp)
 
             lines = resp.split('\r\n')
             if '200' not in lines[0]:
                 self.event('proxy_error', resp)
-                log.error('Proxy Error: %s' % lines[0])
+                log.error('Proxy Error: %s' , lines[0])
                 return False
 
             # Proxy connection established, continue connecting
@@ -510,7 +510,7 @@ class XMLStream(object):
         # Wait for confirmation that the stream was
         # closed in the other direction.
         self.auto_reconnect = reconnect
-        log.debug('Waiting for %s from server' % self.stream_footer)
+        log.debug('Waiting for %s from server' , self.stream_footer)
         self.stream_end_event.wait(4)
         if not self.auto_reconnect:
             self.stop.set()
@@ -601,7 +601,7 @@ class XMLStream(object):
         """
         if self.ssl_support:
             log.info("Negotiating TLS")
-            log.info("Using SSL version: %s" % str(self.ssl_version))
+            log.info("Using SSL version: %s" , str(self.ssl_version))
             if self.ca_certs is None:
                 cert_policy = ssl.CERT_NONE
             else:
@@ -759,7 +759,7 @@ class XMLStream(object):
             try:
                 answers = resolver.query(domain, dns.rdatatype.A)
             except (dns.resolver.NXDOMAIN, dns.resolver.NoAnswer):
-                log.warning("No A records for %s" % domain)
+                log.warning("No A records for %s" , domain)
                 return [((domain, port), 0, 0)]
             except dns.exception.Timeout:
                 log.warning("DNS resolution timed out " + \
@@ -808,7 +808,7 @@ class XMLStream(object):
             if self.dns_answers[0] == address:
                 break
         self.dns_answers.pop(idx)
-        log.debug("Trying to connect to %s:%s" % address)
+        log.debug("Trying to connect to %s:%s" , address)
         return address
 
     def add_event_handler(self, name, pointer,
@@ -879,7 +879,7 @@ class XMLStream(object):
                     handler[0](copy.copy(data))
                 except Exception as e:
                     error_msg = 'Error processing event handler: %s'
-                    log.exception(error_msg % str(handler[0]))
+                    log.exception(error_msg , str(handler[0]))
                     if hasattr(data, 'exception'):
                         data.exception(e)
                     else:
@@ -994,7 +994,7 @@ class XMLStream(object):
                          Defaults to self.auto_reconnect.
         """
         if now:
-            log.debug("SEND (IMMED): %s" % data)
+            log.debug("SEND (IMMED): %s" , data)
             try:
                 data = data.encode('utf-8')
                 total = len(data)
@@ -1004,10 +1004,10 @@ class XMLStream(object):
                     sent += self.socket.send(data[sent:])
                     count += 1
                 if count > 1:
-                    log.debug('SENT: %d chunks' % count)
+                    log.debug('SENT: %d chunks' , count)
             except Socket.error as serr:
                 self.event('socket_error', serr)
-                log.warning("Failed to send %s" % data)
+                log.warning("Failed to send %s" , data)
                 if reconnect is None:
                     reconnect = self.auto_reconnect
                 self.disconnect(reconnect)
@@ -1187,7 +1187,7 @@ class XMLStream(object):
         Arguments:
             xml -- The XML stanza to analyze.
         """
-        log.debug("RECV: %s" % tostring(xml,
+        log.debug("RECV: %s" , tostring(xml,
                                             xmlns=self.default_ns,
                                             stream=self))
         # Apply any preprocessing filters.
@@ -1232,7 +1232,7 @@ class XMLStream(object):
             func(*args)
         except Exception as e:
             error_msg = 'Error processing event handler: %s'
-            log.exception(error_msg % str(func))
+            log.exception(error_msg , str(func))
             if hasattr(orig, 'exception'):
                 orig.exception(e)
             else:
@@ -1267,12 +1267,12 @@ class XMLStream(object):
                         handler.run(args[0])
                     except Exception as e:
                         error_msg = 'Error processing stream handler: %s'
-                        log.exception(error_msg % handler.name)
+                        log.exception(error_msg , handler.name)
                         orig.exception(e)
                 elif etype == 'schedule':
                     name = args[1]
                     try:
-                        log.debug('Scheduled event: %s: %s' % (name, args[0]))
+                        log.debug('Scheduled event: %s: %s' , name, args[0])
                         handler(*args[0])
                     except Exception as e:
                         log.exception('Error processing scheduled task')
@@ -1291,7 +1291,7 @@ class XMLStream(object):
                             func(*args)
                     except Exception as e:
                         error_msg = 'Error processing event handler: %s'
-                        log.exception(error_msg % str(func))
+                        log.exception(error_msg , str(func))
                         if hasattr(orig, 'exception'):
                             orig.exception(e)
                         else:
@@ -1324,7 +1324,7 @@ class XMLStream(object):
                         data = self.send_queue.get(True, 1)
                     except queue.Empty:
                         continue
-                log.debug("SEND: %s" % data)
+                log.debug("SEND: %s" , data)
                 try:
                     enc_data = data.encode('utf-8')
                     total = len(enc_data)
@@ -1334,15 +1334,15 @@ class XMLStream(object):
                         sent += self.socket.send(enc_data[sent:])
                         count += 1
                     if count > 1:
-                        log.debug('SENT: %d chunks' % count)
+                        log.debug('SENT: %d chunks' , count)
                     self.send_queue.task_done()
                 except Socket.error as serr:
                     self.event('socket_error', serr)
-                    log.warning("Failed to send %s" % data)
+                    log.warning("Failed to send %s" , data)
                     self.__failed_send_stanza = data
                     self.disconnect(self.auto_reconnect)
         except Exception as ex:
-            log.exception('Unexpected error in send thread: %s' % ex)
+            log.exception('Unexpected error in send thread: %s' , ex)
             self.exception(ex)
             if not self.stop.is_set():
                 self.disconnect(self.auto_reconnect)