Pass code check with pylint=2.4.4 (#1012)

examples/linuxrouter.py

@@ -38,6 +38,7 @@ from mininet.cli import CLI
 class LinuxRouter( Node ):
     "A Node with IP forwarding enabled."
 
+    # pylint: disable=arguments-differ
     def config( self, **params ):
         super( LinuxRouter, self).config( **params )
         # Enable forwarding on the router
@@ -51,6 +52,7 @@ class LinuxRouter( Node ):
 class NetworkTopo( Topo ):
     "A LinuxRouter connecting three IP subnets"
 
+    # pylint: disable=arguments-differ
     def build( self, **_opts ):
 
         defaultIP = '192.168.1.1/24'  # IP address for r0-eth1
@@ -87,6 +89,7 @@ def run():
     CLI( net )
     net.stop()
 
+
 if __name__ == '__main__':
     setLogLevel( 'info' )
     run()