text: import sys
  import os
  import subprocess
  import csv
  import operator
  import time
  import argparse
  import re
  import logging
  from igraph import *
  
  
  def refine_label(kraken2_file):
  
      closest_neighbours = assembly_graph.neighbors(i, mode=ALL)
  '''
      mark i as visited
      CLV = 0 
      SET = 0 
      while SET != 0 and CLV = 0:
          for v in SET:
              mark v as visited
              if L(v) == 1:
                  CLV = Clv.append(v)
              else:
                  for r in closest_neighbours(v):
                      if L(r) == 0:
                          SET = SET.append(r)
      SET_curr = SET_next
  ...
  '''
      
      
      #closest_neighbours = assembly_graph.neighbors(i, mode=ALL) 
  