Removed underscores for public Node methods. Minor cleanup & comments.

examples/scratchnetuser.py

@@ -5,7 +5,7 @@ Build a simple network from scratch, using mininet primitives.
 This is more complicated than using the higher-level classes,
 but it exposes the configuration details and allows customization.
 
-This version uses the user datapath.
+This version uses the user datapath and an explicit control network.
 """
 
 from mininet.net import init
@@ -14,7 +14,8 @@ from mininet.util import createLink
 from mininet.log import lg, info
 
 def scratchNetUser( cname='controller', cargs='ptcp:' ):
-    # Create Network
+    "Create network from scratch using user switch."
+
     # It's not strictly necessary for the controller and switches
     # to be in separate namespaces. For performance, they probably
     # should be in the root namespace. However, it's interesting to
@@ -32,15 +33,15 @@ def scratchNetUser( cname='controller', cargs='ptcp:' ):
     info( '*** Configuring control network\n' )
     controller.setIP( controller.intfs[ 0 ], '10.0.123.1', 24 )
     switch.setIP( switch.intfs[ 0 ], '10.0.123.2', 24 )
-    
+
     info( '*** Configuring hosts\n' )
     h0.setIP( h0.intfs[ 0 ], '192.168.123.1', 24 )
     h1.setIP( h1.intfs[ 0 ], '192.168.123.2', 24 )
-    
+
     info( '*** Network state:\n' )
     for node in controller, switch, h0, h1:
         info( str( node ) + '\n' )
-        
+
     info( '*** Starting controller and user datapath\n' )
     controller.cmd( cname + ' ' + cargs + '&' )
     switch.cmd( 'ifconfig lo 127.0.0.1' )
@@ -57,9 +58,9 @@ def scratchNetUser( cname='controller', cargs='ptcp:' ):
     switch.cmd( 'kill %ofprotocol' )
     switch.deleteIntfs()
     info( '\n' )
-        
+
 if __name__ == '__main__':
     lg.setLogLevel( 'info' )
     info( '*** Scratch network demo (user datapath)\n' )
-    init()   
+    init()
     scratchNetUser()