old_contents: import sys
  import os
  sys.path.append(os.path.abspath(os.path.curdir))
  
  from converter import gml_to_node_edge_list
  
  
  if __name__ == '__main__':
      in_file = sys.argv[1]
      res = gml_to_node_edge_list(in_file, routing=True)
  
new_contents: import sys
  import os
  sys.path.append(os.path.abspath(os.path.curdir))
  
  from converter import gml_to_node_edge_list
  
  
  if __name__ == '__main__':
      in_file = sys.argv[1]
      outfile = sys.argv[2] if len(sys.argv) > 2 else None
      res = gml_to_node_edge_list(in_file, outfile=outfile, routing=True)
  
subject: Add outfile option to conversion script