diff --git a/examples/simpleperf.py b/examples/simpleperf.py
index 76de0bd..3dad32c 100644
--- a/examples/simpleperf.py
+++ b/examples/simpleperf.py
@@ -19,10 +19,10 @@ class SingleSwitchTopo(Topo):
         for h in range(n):
             # Each host gets 50%/n of system CPU
             host = self.addHost('h%s' % (h + 1),
-                                 cpu=.5 / n)
+                                cpu=.5 / n)
             # 10 Mbps, 5ms delay, 10% loss
             self.addLink(host, switch,
-                          bw=10, delay='5ms', loss=10, use_htb=True)
+                         bw=10, delay='5ms', loss=10, use_htb=True)
 
 def perfTest():
     "Create network and run simple performance test"
diff --git a/examples/treeping64.py b/examples/treeping64.py
index 8385a33..ba60f1b 100755
--- a/examples/treeping64.py
+++ b/examples/treeping64.py
@@ -10,9 +10,9 @@ def treePing64():
     "Run ping test on 64-node tree networks."
 
     results = {}
-    switches = { # 'reference kernel': KernelSwitch,
-                 'reference user': UserSwitch,
-                 'Open vSwitch kernel': OVSKernelSwitch }
+    switches = {  # 'reference kernel': KernelSwitch,
+                  'reference user': UserSwitch,
+                  'Open vSwitch kernel': OVSKernelSwitch }
 
     for name in switches:
         print "*** Testing", name, "datapath"
diff --git a/mininet/link.py b/mininet/link.py
index 43cd207..21e18ba 100644
--- a/mininet/link.py
+++ b/mininet/link.py
@@ -246,11 +246,11 @@ class TCIntf( Intf ):
                 '%s ' % jitter if jitter is not None else '',
                 'loss %d ' % loss if loss is not None else '',
                 'limit %d' % max_queue_size if max_queue_size is not None
-                 else '' )
+                else '' )
             if netemargs:
                 cmds = [ '%s qdisc add dev %s ' + parent +
                          ' handle 10: netem ' +
-                          netemargs ]
+                         netemargs ]
         return cmds
 
     def tc( self, cmd, tc='tc' ):
@@ -290,8 +290,8 @@ class TCIntf( Intf ):
 
         # Delay/jitter/loss/max_queue_size using netem
         cmds += self.delayCmds( delay=delay, jitter=jitter, loss=loss,
-                                 max_queue_size=max_queue_size,
-                                 parent=parent )
+                                max_queue_size=max_queue_size,
+                                parent=parent )
 
         # Ugly but functional: display configuration info
         stuff = ( ( [ '%.2fMbit' % bw ] if bw is not None else [] ) +
diff --git a/mininet/net.py b/mininet/net.py
index ccce862..6a091c3 100755
--- a/mininet/net.py
+++ b/mininet/net.py
@@ -423,7 +423,7 @@ class Mininet( object ):
         m = re.search( r, pingOutput )
         if m is None:
             error( '*** Error: could not parse ping output: %s\n' %
-                     pingOutput )
+                   pingOutput )
             return (1, 0)
         sent, received = int( m.group( 1 ) ), int( m.group( 2 ) )
         return sent, received
diff --git a/mininet/node.py b/mininet/node.py
index a8b7e30..add10f3 100644
--- a/mininet/node.py
+++ b/mininet/node.py
@@ -770,7 +770,7 @@ class Switch( Node ):
             return Node.sendCmd( self, *cmd, **kwargs )
         else:
             error( '*** Error: %s has execed and cannot accept commands' %
-                     self.name )
+                   self.name )
 
     def __repr__( self ):
         "More informative string representation"
@@ -1053,7 +1053,7 @@ class NOX( Controller ):
         Controller.__init__( self, name,
                              command=noxCoreDir + '/nox_core',
                              cargs='--libdir=/usr/local/lib -v -i ptcp:%s ' +
-                                   ' '.join( noxArgs ),
+                             ' '.join( noxArgs ),
                              cdir=noxCoreDir,
                              **kwargs )
 
@@ -1084,4 +1084,4 @@ class RemoteController( Controller ):
                               ( self.ip, self.port ) )
         if 'Unable' in listening:
             warn( "Unable to contact the remote controller"
-                             " at %s:%d\n" % ( self.ip, self.port ) )
+                  " at %s:%d\n" % ( self.ip, self.port ) )
diff --git a/mininet/topo.py b/mininet/topo.py
index 27df013..fff9604 100644
--- a/mininet/topo.py
+++ b/mininet/topo.py
@@ -63,7 +63,7 @@ class Topo(object):
         return result
 
     def addLink(self, node1, node2, port1=None, port2=None,
-                 **opts):
+                **opts):
         """node1, node2: nodes to link together
            port1, port2: ports (optional)
            opts: link options (optional)
@@ -205,7 +205,7 @@ class SingleSwitchReversedTopo(Topo):
         for h in irange(1, k):
             host = self.addHost('h%s' % h)
             self.addLink(host, switch,
-                          port1=0, port2=(k - h + 1))
+                         port1=0, port2=(k - h + 1))
 
 class LinearTopo(Topo):
     "Linear topology of k switches, with one host per switch."