old_contents: #!/usr/bin/python
  
  "clusterdemo.py: demo of Mininet Cluster Edition prototype"
  
  from mininet.examples.cluster import MininetCluster, SwitchBinPlacer
  from cluster import RemoteLink
  # Could also use: RemoteSSHLink, RemoteGRELink
  from mininet.topolib import TreeTopo
  from mininet.log import setLogLevel
  from mininet.examples.clustercli import ClusterCLI as CLI
  
  def demo():
      "Simple Demo of Cluster Mode"
      servers = [ 'localhost', 'ubuntu2', 'ubuntu3' ]
      topo = TreeTopo( depth=3, fanout=3 )
      net = MininetCluster( topo=topo, servers=servers, Link=RemoteLink,
                            placement=SwitchBinPlacer )
      net.start()
      CLI( net )
      net.stop()
  
  if __name__ == '__main__':
      setLogLevel( 'info' )
      demo()
  
new_contents: #!/usr/bin/python
  
  "clusterdemo.py: demo of Mininet Cluster Edition prototype"
  
  from mininet.examples.cluster import ( MininetCluster, SwitchBinPlacer,
                                         RemoteLink )
  # ^ Could also use: RemoteSSHLink, RemoteGRELink
  from mininet.topolib import TreeTopo
  from mininet.log import setLogLevel
  from mininet.examples.clustercli import ClusterCLI as CLI
  
  def demo():
      "Simple Demo of Cluster Mode"
      servers = [ 'localhost', 'ubuntu2', 'ubuntu3' ]
      topo = TreeTopo( depth=3, fanout=3 )
      net = MininetCluster( topo=topo, servers=servers, Link=RemoteLink,
                            placement=SwitchBinPlacer )
      net.start()
      CLI( net )
      net.stop()
  
  if __name__ == '__main__':
      setLogLevel( 'info' )
      demo()
  
subject: Remove relative import