diff --git a/TestON/drivers/common/cli/tool/dpctlclidriver.py b/TestON/drivers/common/cli/tool/dpctlclidriver.py
index 3ad5bba..252fb8c 100644
--- a/TestON/drivers/common/cli/tool/dpctlclidriver.py
+++ b/TestON/drivers/common/cli/tool/dpctlclidriver.py
@@ -1,14 +1,14 @@
 #/usr/bin/env python
-'''
+"""
 Created on 26-Nov-2012
-       
-@author: Raghav Kashyap(raghavkashyap@paxterrasolutions.com)
+
+author:: Raghav Kashyap( raghavkashyap@paxterrasolutions.com )
 
 
     TestON is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 2 of the License, or
-    (at your option) any later version.
+    ( at your option ) any later version.
 
     TestON is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ -16,14 +16,18 @@
     GNU General Public License for more details.
 
     You should have received a copy of the GNU General Public License
-    along with TestON.  If not, see <http://www.gnu.org/licenses/>.		
+    along with TestON.  If not, see <http://www.gnu.org/licenses/>.
 
 
 
 DPCTL driver class provides the basic functions of DPCTL controller
-'''
+"""
 import pexpect
-import struct, fcntl, os, sys, signal
+import struct
+import fcntl
+import os
+import sys
+import signal
 import sys
 from drivers.common.cli.toolsdriver import Tools
 import pydoc
@@ -32,214 +36,280 @@
 import os
 import sys
 
-class DpctlCliDriver(Tools):
-    '''
+
+class DpctlCliDriver( Tools ):
+
+    """
      DpctlCliDriver driver class provides the basic functions of DPCTL controller
-    '''
-    def __init__(self):
-        super(DpctlCliDriver, self).__init__()
+    """
+    def __init__( self ):
+        super( DpctlCliDriver, self ).__init__()
         self.handle = self
-        self.wrapped = sys.modules[__name__]
-    
-    def connect(self,**connectargs):
-        
+        self.wrapped = sys.modules[ __name__ ]
+
+    def connect( self, **connectargs ):
+
         for key in connectargs:
-            vars(self)[key] = connectargs[key]       
-        
-        self.name = self.options['name']
-        
-        self.handle = super(DpctlCliDriver, self).connect(user_name = self.user_name, ip_address = self.ip_address,port = None, pwd = self.pwd)
-        if self.handle :
-            main.log.info("Connected to the host")
-            return main.TRUE
-        else :
-            main.log.error("Connection failed to the host "+self.user_name+"@"+self.ip_address)
-            return main.FALSE 
+            vars( self )[ key ] = connectargs[ key ]
 
-    def addFlow(self,**flowParameters):
-        '''
+        self.name = self.options[ 'name' ]
+
+        self.handle = super( 
+		      DpctlCliDriver, self ).connect( user_name=self.user_name,
+         	      ip_address=self.ip_address,
+         	      port=None,
+         	      pwd=self.pwd )
+        if self.handle:
+            main.log.info( "Connected to the host" )
+            return main.TRUE
+        else:
+            main.log.error(
+                "Connection failed to the host " +
+                self.user_name +
+                "@" +
+                self.ip_address )
+            return main.FALSE
+
+    def addFlow( self, **flowParameters ):
+        """
          addFlow create a new flow entry into flow table using "dpctl"
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT","INPORT","ACTION","TIMEOUT"],**flowParameters)
+        """
+        args = utilities.parse_args( [
+				     "TCPIP",
+                                     "TCPPORT",
+                                     "INPORT",
+                                     "ACTION",
+                                     "TIMEOUT" ],
+            			     **flowParameters )
+
         cmd = "dpctl add-flow tcp:"
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        timeOut = args["TIMEOUT"] if args["TIMEOUT"] != None else 120
-        cmd = cmd + tcpIP + ":" + tcpPort + " in_port=" + str(args["INPORT"]) + ",idle_timeout=" + str(args["TIMEOUT"]) +",actions=" + args["ACTION"]   
-        response = self.execute(cmd=cmd,prompt="\~\$",timeout=60 )
-        if utilities.assert_matches(expect="openflow",actual=response,onpass="Flow Added Successfully",onfail="Adding Flow Failed!!!"):
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        timeOut = args[ "TIMEOUT" ] if args[ "TIMEOUT" ] is not None else 120
+        cmd = cmd + tcpIP + ":" + tcpPort + " in_port=" + \
+            str( args[ "INPORT" ] ) + ",idle_timeout=" + str(
+                args[ "TIMEOUT" ] ) + ",actions=" + args[ "ACTION" ]
+        response = self.execute( cmd=cmd, prompt="\~\$", timeout=60 )
+        if utilities.assert_matches( expect="openflow", actual=response, onpass="Flow Added Successfully", onfail="Adding Flow Failed!!!" ):
             return main.TRUE
-        else :
+        else:
             return main.FALSE
 
-    def showFlow(self,**flowParameters):
-        '''
+    def showFlow( self, **flowParameters ):
+        """
          showFlow dumps the flow entries of flow table using "dpctl"
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT"],**flowParameters)
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        command = "dpctl show tcp:" + str(tcpIP) + ":" + str(tcpPort)
-        response = self.execute(cmd=command,prompt="get_config_reply",timeout=240)
-        if utilities.assert_matches(expect='features_reply',actual=response,onpass="Show flow executed",onfail="Show flow execution Failed"):
+        """
+        args = utilities.parse_args( [ "TCPIP", "TCPPORT" ], **flowParameters )
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        command = "dpctl show tcp:" + str( tcpIP ) + ":" + str( tcpPort )
+        response = self.execute(
+            cmd=command,
+            prompt="get_config_reply",
+            timeout=240 )
+        if utilities.assert_matches( expect='features_reply', actual=response, onpass="Show flow executed", onfail="Show flow execution Failed" ):
             main.last_result = main.TRUE
             return main.TRUE
-        else :
+        else:
             main.last_result = main.FALSE
             return main.FALSE
 
-    def dumpFlow(self,**flowParameters):
-        '''
+    def dumpFlow( self, **flowParameters ):
+        """
          dumpFlow  gives installed flow information
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT"],**flowParameters)
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        command = "dpctl dump-flows tcp:" + str(tcpIP) + ":" + str(tcpPort)
-        response = self.execute(cmd=command,prompt="type=",timeout=240)
-        if utilities.assert_matches(expect='stats_reply',actual=response,onpass="Dump flow executed",onfail="Dump flow execution Failed"):
+        """
+        args = utilities.parse_args( [ "TCPIP", "TCPPORT" ], **flowParameters )
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        command = "dpctl dump-flows tcp:" + str( tcpIP ) + ":" + str( tcpPort )
+        response = self.execute( cmd=command, prompt="type=", timeout=240 )
+        if utilities.assert_matches( expect='stats_reply', actual=response, onpass="Dump flow executed", onfail="Dump flow execution Failed" ):
             main.last_result = main.TRUE
             return main.TRUE
-        else :
+        else:
             main.last_result = main.FALSE
             return main.FALSE
 
-    
-    def dumpTables(self,**flowParameters):
-        '''
+    def dumpTables( self, **flowParameters ):
+        """
          dumpTables gives statistics for each of the flow tables used by datapath switch.
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT"],**flowParameters)
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        command = "dpctl dump-tables tcp:" + str(tcpIP) + ":" + str(tcpPort)
-        response = self.execute(cmd=command,prompt="matched",timeout=240)
-        if utilities.assert_matches(expect='lookup=3',actual=response,onpass="Dump Tables executed",onfail="Dump Tables execution Failed"):
+        """
+        args = utilities.parse_args( [ "TCPIP", "TCPPORT" ], **flowParameters )
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        command = "dpctl dump-tables tcp:" + \
+            str( tcpIP ) + ":" + str( tcpPort )
+        response = self.execute( cmd=command, prompt="matched", timeout=240 )
+        if utilities.assert_matches( expect='lookup=3', actual=response, onpass="Dump Tables executed", onfail="Dump Tables execution Failed" ):
             main.last_result = main.TRUE
             return main.TRUE
-        else :
+        else:
             main.last_result = main.FALSE
             return main.FALSE
-         
-    def dumpPorts(self,**flowParameters):
-        '''
+
+    def dumpPorts( self, **flowParameters ):
+        """
          dumpPorts gives ports information
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT"],**flowParameters)
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        command = "dpctl dump-ports tcp:" + str(tcpIP) + ":" + str(tcpPort)
-        response = self.execute(cmd=command,prompt="rx pkts",timeout=240)
-        if utilities.assert_matches(expect='ports',actual=response,onpass="Dump Ports executed",onfail="Dump Ports execution Failed"):
+        """
+        args = utilities.parse_args( [ "TCPIP", "TCPPORT" ], **flowParameters )
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        command = "dpctl dump-ports tcp:" + str( tcpIP ) + ":" + str( tcpPort )
+        response = self.execute( cmd=command, prompt="rx pkts", timeout=240 )
+        if utilities.assert_matches( expect='ports', actual=response, onpass="Dump Ports executed", onfail="Dump Ports execution Failed" ):
             main.last_result = main.TRUE
             return main.TRUE
-        else :
+        else:
             main.last_result = main.FALSE
             return main.FALSE
 
-
-    def dumpAggregate(self,**flowParameters):
-        '''
+    def dumpAggregate( self, **flowParameters ):
+        """
          dumpAggregate  gives installed flow information.ggregate statistics for flows in datapath WITCH's tables that match flows.
          If flows is omitted, the statistics are aggregated across all flows in the datapath's flow tables
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT","FLOW"],**flowParameters)
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        flow = args["FLOW"] if args["FLOW"] != None else ""
-        command = "dpctl dump-aggregate tcp:" + str(tcpIP) + ":" + str(tcpPort) + " " + str (flow)
-        response = self.execute(cmd=command,prompt="flow_count=",timeout=240)
-        if utilities.assert_matches(expect='stats_reply',actual=response,onpass="Dump Aggregate executed",onfail="Dump Aggregate execution Failed"):
+        """
+        args = utilities.parse_args(
+            [ "TCPIP", "TCPPORT", "FLOW" ], **flowParameters )
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        flow = args[ "FLOW" ] if args[ "FLOW" ] is not None else ""
+        command = "dpctl dump-aggregate tcp:" + \
+            str( tcpIP ) + ":" + str( tcpPort ) + " " + str( flow )
+        response = self.execute(
+            cmd=command,
+            prompt="flow_count=",
+            timeout=240 )
+        if utilities.assert_matches( expect='stats_reply', actual=response, onpass="Dump Aggregate executed", onfail="Dump Aggregate execution Failed" ):
             main.last_result = main.TRUE
             return main.TRUE
-        else :
+        else:
             main.last_result = main.FALSE
             return main.FALSE
 
-    def delFlow(self,**flowParameters):
-        '''
+    def delFlow( self, **flowParameters ):
+        """
          delFlow Deletes entries from the datapath switch's tables that match flow
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT","FLOW"],**flowParameters)
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        flow = args["FLOW"] if args["FLOW"] != None else ""
-        command = "dpctl del-flows tcp:" + str(tcpIP) + ":" + str(tcpPort) + " " +str(flow)
-        response = self.execute(cmd=command,prompt="ETH-Tutorial",timeout=240)
-        if utilities.assert_matches(expect='@',actual=response,onpass="Delete flow executed",onfail="Delete flow execution Failed"):
+        """
+        args = utilities.parse_args(
+            [ "TCPIP", "TCPPORT", "FLOW" ], **flowParameters )
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        flow = args[ "FLOW" ] if args[ "FLOW" ] is not None else ""
+        command = "dpctl del-flows tcp:" + \
+            str( tcpIP ) + ":" + str( tcpPort ) + " " + str( flow )
+        response = self.execute(
+            cmd=command,
+            prompt="ETH-Tutorial",
+            timeout=240 )
+        if utilities.assert_matches( expect='@', actual=response, onpass="Delete flow executed", onfail="Delete flow execution Failed" ):
             main.last_result = main.TRUE
             return main.TRUE
-        else :
+        else:
             main.last_result = main.FALSE
             return main.FALSE
 
-    def show(self,**flowParameters):
-        '''
+    def show( self, **flowParameters ):
+        """
          show gives information on datapath switch including information on its flow tables and ports.
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT"],**flowParameters)
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        command = "dpctl show tcp:" + str(tcpIP) + ":" + str(tcpPort)
-        response = self.execute(cmd=command,prompt="miss_send_len=",timeout=240)
-        if utilities.assert_matches(expect='get_config_reply',actual=response,onpass="show command executed",onfail="show command execution Failed"):
+        """
+        args = utilities.parse_args( [ "TCPIP", "TCPPORT" ], **flowParameters )
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        command = "dpctl show tcp:" + str( tcpIP ) + ":" + str( tcpPort )
+        response = self.execute(
+            cmd=command,
+            prompt="miss_send_len=",
+            timeout=240 )
+        if utilities.assert_matches( expect='get_config_reply', actual=response, onpass="show command executed", onfail="show command execution Failed" ):
             main.last_result = main.TRUE
             return main.TRUE
-        else :
+        else:
             main.last_result = main.FALSE
             return main.FALSE
 
-    def showStatus(self,**flowParameters):
-        '''
-         showStatus gives a series of key-value pairs that report the status of switch. 
-         If key is specified, only the key-value pairs whose key names begin with key are printed. 
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT","KEY"],**flowParameters)
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        key = args["KEY"] if args["KEY"] != None else ""
-        command = "dpctl status tcp:" + str(tcpIP) + ":" + str(tcpPort) + " " + key
-        response = self.execute(cmd=command,prompt="(.*)",timeout=240)
-        if utilities.assert_matches(expect='(.*)',actual=response,onpass="show command executed",onfail="show command execution Failed"):
+    def showStatus( self, **flowParameters ):
+        """
+         showStatus gives a series of key-value pairs that report the status of switch.
+         If key is specified, only the key-value pairs whose key names begin with key are printed.
+        """
+        args = utilities.parse_args(
+            [ "TCPIP", "TCPPORT", "KEY" ], **flowParameters )
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        key = args[ "KEY" ] if args[ "KEY" ] is not None else ""
+        command = "dpctl status tcp:" + \
+            str( tcpIP ) + ":" + str( tcpPort ) + " " + key
+        response = self.execute( cmd=command, prompt="(.*)", timeout=240 )
+        if utilities.assert_matches( expect='(.*)', actual=response, onpass="show command executed", onfail="show command execution Failed" ):
             main.last_result = main.TRUE
             return main.TRUE
-        else :
+        else:
             main.last_result = main.FALSE
             return main.FALSE
 
-    def desc_set(self,**flowParameters):
-        '''
-         desc_set Sets the switch description (as returned in ofp_desc_stats) to string (max length is DESC_STR_LEN)
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT","STRING"],**flowParameters)
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        string = " " + args["STRING"] if args["STRING"] != None else " DESC_STR_LEN"
-        command = "dpctl desc tcp:" + str(tcpIP) + ":" + str(tcpPort) + str(string)
-        response = self.execute(cmd=command,prompt="ETH-Tutorial",timeout=240)
-        if utilities.assert_matches(expect='@',actual=response,onpass="desc command executed",onfail="desc command execution Failed"):
+    def desc_set( self, **flowParameters ):
+        """
+         desc_set Sets the switch description ( as returned in ofp_desc_stats ) to string ( max length is DESC_STR_LEN )
+        """
+        args = utilities.parse_args( [
+				     "TCPIP",
+                                     "TCPPORT",
+                                     "STRING" ],
+           			     **flowParameters )
+
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        string = " " + args[ "STRING" ] if args[
+            "STRING" ] is not None else " DESC_STR_LEN"
+        command = "dpctl desc tcp:" + \
+            str( tcpIP ) + ":" + str( tcpPort ) + str( string )
+        response = self.execute(
+            cmd=command,
+            prompt="ETH-Tutorial",
+            timeout=240 )
+        if utilities.assert_matches( expect='@', actual=response, onpass="desc command executed", onfail="desc command execution Failed" ):
             main.last_result = main.TRUE
             return main.TRUE
-        else :
+        else:
             main.last_result = main.FALSE
             return main.FALSE
 
-    def dumpDesc(self,**flowParameters):
-        '''
-         dumpDesc Sets the switch description (as returned in ofp_desc_stats) to string (max length is DESC_STR_LEN)
-        '''
-        args = utilities.parse_args(["TCPIP","TCPPORT","STRING"],**flowParameters)
-        tcpIP = args["TCPIP"] if args["TCPIP"] != None else "127.0.0.1"
-        tcpPort = args["TCPPORT"] if args["TCPPORT"] != None else "6634"
-        command = "dpctl dump-desc tcp:" + str(tcpIP) + ":" + str(tcpPort) 
-        response = self.execute(cmd=command,prompt="Serial Num:",timeout=240)
-        if utilities.assert_matches(expect='stats_reply',actual=response,onpass="desc command executed",onfail="desc command execution Failed"):
+    def dumpDesc( self, **flowParameters ):
+        """
+         dumpDesc Sets the switch description ( as returned in ofp_desc_stats ) to string ( max length is DESC_STR_LEN )
+        """
+        args = utilities.parse_args( [
+				     "TCPIP",
+                                     "TCPPORT",
+                                     "STRING" ],
+            			     **flowParameters )
+
+        tcpIP = args[ "TCPIP" ] if args[ "TCPIP" ] is not None else "127.0.0.1"
+        tcpPort = args[ "TCPPORT" ] if args[
+            "TCPPORT" ] is not None else "6634"
+        command = "dpctl dump-desc tcp:" + str( tcpIP ) + ":" + str( tcpPort )
+        response = self.execute(
+            cmd=command,
+            prompt="Serial Num:",
+            timeout=240 )
+        if utilities.assert_matches( expect='stats_reply', actual=response, onpass="desc command executed", onfail="desc command execution Failed" ):
             main.last_result = main.TRUE
             return main.TRUE
-        else :
+        else:
             main.last_result = main.FALSE
             return main.FALSE
 
 if __name__ != "__main__":
     import sys
-    sys.modules[__name__] = DpctlCliDriver()
+    sys.modules[ __name__ ] = DpctlCliDriver()
+