new_contents: import sys
  import pickle
  
  
  ##this shows the content of nodes files
  ##how to call it:
  #python show_rrt_nodes.py nodes.pck |sort -t, -k1 -nr|less
  #this prints out the list of nodes
  #and sort it based on rrt time in
  #decrescent order
  filename=sys.argv[1]
  
  myfile = open(filename, "r") # read mode
  dictionary = pickle.load(myfile)
  myfile.close()
  for node in dictionary:
          print str(dictionary[node])+","+node
  print len(dictionary)
subject: add show rrt