new_contents: #!/usr/bin/python3
  #
  # start pytrain
  #
  import os
  import sys
  
  MYDIR = os.path.dirname(sys.argv[0])
  
  os.system(MYDIR+"/run.sh")
  if len(sys.argv)==1:
      sys.argv.append("10.0.0.6")
  os.system("chromium http://%s:8000/index.html"%(sys.argv[1]))
  
subject: Integrate switch 10 and introduce couplings.