Spacing tweaks for pep8 checker

Makefile

@@ -6,7 +6,7 @@ BIN = $(MN)
 PYSRC = $(MININET) $(TEST) $(EXAMPLES) $(BIN)
 MNEXEC = mnexec
 MANPAGES = mn.1 mnexec.1
-P8IGN = E251,E201,E302,E202
+P8IGN = E251,E201,E302,E202,E126,E127,E203,E226
 BINDIR = /usr/bin
 MANDIR = /usr/share/man/man1
 DOCDIRS = doc/html doc/latex

bin/mn

@@ -206,7 +206,9 @@ class MininetRunner( object ):
         opts.add_option( '--custom', action='callback',
                          callback=self.custom,
                          type='string',
-                         help='read custom classes or params from .py file(s)' )
+                         help='read custom classes or params from .py file(s)'
+                         )
+
         opts.add_option( '--test', type='choice', choices=TESTS,
                          default=TESTS[ 0 ],
                          help='|'.join( TESTS ) )
@@ -344,7 +346,8 @@ class MininetRunner( object ):
                   listenPort=listenPort )
 
         if self.options.ensure_value( 'nat', False ):
-            nat = mn.addNAT( *self.options.nat_args, **self.options.nat_kwargs )
+            nat = mn.addNAT( *self.options.nat_args,
+                             **self.options.nat_kwargs )
             nat.configDefault()
 
         if self.options.pre:

examples/cluster.py

@@ -254,8 +254,10 @@ class RemoteMixin( object ):
 
     def addIntf( self, *args, **kwargs ):
         "Override: use RemoteLink.moveIntf"
-        return super( RemoteMixin, self).addIntf( *args,
+        return super( RemoteMixin,
-                        moveIntfFn=RemoteLink.moveIntf, **kwargs )
+                      self).addIntf( *args,
+                                     moveIntfFn=RemoteLink.moveIntf,
+                                     **kwargs )
 
     def cleanup( self ):
         "Help python collect its garbage."
@@ -277,7 +279,9 @@ class RemoteHost( RemoteNode ):
 
 class RemoteOVSSwitch( RemoteMixin, OVSSwitch ):
     "Remote instance of Open vSwitch"
+
     OVSVersions = {}
+
     def isOldOVS( self ):
         "Is remote switch using an old OVS version?"
         cls = type( self )
@@ -291,9 +295,7 @@ class RemoteOVSSwitch( RemoteMixin, OVSSwitch ):
                  StrictVersion( '1.10' ) )
 
 
-
 class RemoteLink( Link ):
-
     "A RemoteLink is a link between nodes which may be on different servers"
 
     def __init__( self, node1, node2, **kwargs ):
@@ -589,7 +591,6 @@ class HostSwitchBinPlacer( Placer ):
         return server
 
 
-
 # The MininetCluster class is not strictly necessary.
 # However, it has several purposes:
 # 1. To set up ssh connection sharing/multiplexing
@@ -667,7 +668,8 @@ class MininetCluster( Mininet ):
             result |= code
         if result:
             error( '*** Server precheck failed.\n'
-                   '*** Make sure that the above ssh command works correctly.\n'
+                   '*** Make sure that the above ssh command works'
+                   ' correctly.\n'
                    '*** You may also need to run mn -c on all nodes, and/or\n'
                    '*** use sudo -E.\n' )
             sys.exit( 1 )
@@ -679,7 +681,6 @@ class MininetCluster( Mininet ):
         kwargs[ 'splitInit' ] = True
         return Mininet.addHost( *args, **kwargs )
 
-
     def placeNodes( self ):
         """Place nodes on servers (if they don't have a server), and
            start shell processes"""
@@ -695,7 +696,7 @@ class MininetCluster( Mininet ):
         for node in nodes:
             config = self.topo.nodeInfo( node )
             # keep local server name consistent accross nodes
-            if 'server' in config.keys() and config[ 'server' ] == None:
+            if 'server' in config.keys() and config[ 'server' ] is None:
                 config[ 'server' ] = 'localhost'
             server = config.setdefault( 'server', placer.place( node ) )
             if server:

examples/clustercli.py

@@ -88,7 +88,6 @@ class ClusterCLI( CLI ):
         else:
             output( 'All nodes are still running.\n' )
 
-
     def do_placement( self, _line ):
         "Describe node placement"
         mn = self.mn

examples/clusterdemo.py

@@ -20,4 +20,3 @@ def demo():
 if __name__ == '__main__':
     setLogLevel( 'info' )
     demo()
-

examples/hwintf.py

@@ -5,7 +5,8 @@ This example shows how to add an interface (for example a real
 hardware interface) to a network after the network is created.
 """
 
-import re, sys
+import re
+import sys
 
 from mininet.cli import CLI
 from mininet.log import setLogLevel, info, error

mininet/cli.py

@@ -367,7 +367,8 @@ class CLI( Cmd ):
             elif command == 'stop':
                 self.mn.get( sw ).stop( deleteIntfs=False )
             else:
-                error( 'invalid command: switch <switch name> {start, stop}\n' )
+                error( 'invalid command: '
+                       'switch <switch name> {start, stop}\n' )
 
     def default( self, line ):
         """Called on an input line when the command prefix is not recognized.

mininet/link.py

@@ -91,7 +91,8 @@ class Intf( object ):
         "Return updated IP address based on ifconfig"
         # use pexec instead of node.cmd so that we dont read
         # backgrounded output from the cli.
-        ifconfig, _err, _exitCode = self.node.pexec( 'ifconfig %s' % self.name )
+        ifconfig, _err, _exitCode = self.node.pexec(
+            'ifconfig %s' % self.name )
         ips = self._ipMatchRegex.findall( ifconfig )
         self.ip = ips[ 0 ] if ips else None
         return self.ip
@@ -333,7 +334,8 @@ class TCIntf( Intf ):
 
         # Delay/jitter/loss/max_queue_size using netem
         delaycmds, parent = self.delayCmds( delay=delay, jitter=jitter,
-                                loss=loss, max_queue_size=max_queue_size,
+                                            loss=loss,
+                                            max_queue_size=max_queue_size,
                                             parent=parent )
         cmds += delaycmds
 

mininet/net.py

@@ -170,7 +170,6 @@ class Mininet( object ):
         if topo and build:
             self.build()
 
-
     def waitConnected( self, timeout=None, delay=.5 ):
         """wait for each switch to connect to a controller,
            up to 5 seconds

mininet/node.py

@@ -1196,7 +1196,6 @@ class OVSSwitch( Switch ):
         for intf in self.intfList():
             self.TCReapply( intf )
 
-
     def stop( self, deleteIntfs=True ):
         """Terminate OVS switch.
            deleteIntfs: delete interfaces? (True)"""
@@ -1354,17 +1353,20 @@ class Controller( Node ):
         return '<%s %s: %s:%s pid=%s> ' % (
             self.__class__.__name__, self.name,
             self.IP(), self.port, self.pid )
+
     @classmethod
     def isAvailable( cls ):
         "Is controller available?"
         return quietRun( 'which controller' )
 
+
 class OVSController( Controller ):
     "Open vSwitch controller"
     def __init__( self, name, command='ovs-controller', **kwargs ):
         if quietRun( 'which test-controller' ):
             command = 'test-controller'
         Controller.__init__( self, name, command=command, **kwargs )
+
     @classmethod
     def isAvailable( cls ):
         return ( quietRun( 'which ovs-controller' ) or

mininet/test/test_hifi.py

@@ -195,7 +195,6 @@ class testOptionsTopoCommon( object ):
             self.assertWithinTolerance( rttval, DELAY_MS * 4.0,
                                         DELAY_TOLERANCE, msg )
 
-
     def testLinkLoss( self ):
         "Verify that we see packet drops with a high configured loss rate."
         LOSS_PERCENT = 99
@@ -259,7 +258,8 @@ class testOptionsTopoIVS( testOptionsTopoCommon, unittest.TestCase ):
 @unittest.skipUnless( quietRun( 'which ofprotocol' ),
                       'Reference user switch is not installed' )
 class testOptionsTopoUserspace( testOptionsTopoCommon, unittest.TestCase ):
-    "Verify ability to create networks with host and link options (UserSwitch)."
+    """Verify ability to create networks with host and link options
+     (UserSwitch)."""
     longMessage = True
     switchClass = UserSwitch
 

mininet/test/test_switchdpidassignment.py

@@ -8,7 +8,8 @@ import sys
 
 from mininet.net import Mininet
 from mininet.node import Host, Controller
-from mininet.node import UserSwitch, OVSSwitch, OVSLegacyKernelSwitch, IVSSwitch
+from mininet.node import ( UserSwitch, OVSSwitch, OVSLegacyKernelSwitch,
+                           IVSSwitch )
 from mininet.topo import Topo
 from mininet.log import setLogLevel
 from mininet.util import quietRun
@@ -31,7 +32,8 @@ class TestSwitchDpidAssignmentOVS( unittest.TestCase ):
         """Verify that the default dpid is assigned using a valid provided
         canonical switchname if no dpid is passed in switch creation."""
         switch = Mininet( Topo(),
-                          self.switchClass, Host, Controller ).addSwitch( 's1' )
+                          self.switchClass,
+                          Host, Controller ).addSwitch( 's1' )
         self.assertEqual( switch.defaultDpid(), switch.dpid )
 
     def dpidFrom( self, num ):

mininet/topo.py

@@ -78,7 +78,6 @@ class MultiGraph( object ):
         "Return list of graph edges"
         return list( self.edges_iter( data=data, keys=keys ) )
 
-
     def __getitem__( self, node ):
         "Return link dict for given src node"
         return self.edge[ node ]
@@ -306,7 +305,8 @@ class SingleSwitchTopo( Topo ):
 class SingleSwitchReversedTopo( Topo ):
     """Single switch connected to k hosts, with reversed ports.
        The lowest-numbered host is connected to the highest-numbered port.
-       Useful to verify that Mininet properly handles custom port numberings."""
+       Useful to verify that Mininet properly handles custom port
+       numberings."""
 
     def build( self, k=2 ):
         "k: number of hosts"