old_contents: from Multinet import *
  from builder import *
  from bipartite import *
  from configuration_model import *
  from shortest_path import *
  from l_core import *
  
  from example import *
  
new_contents: from Multinet import *
  from builder import *
  from bipartite import *
  from configuration_model import *
  from shortest_path import *
  from l_core import *
  
  
subject: remove example from init