  from nose.tools import assert_equal
  
  
  class TestBfs(object):
  
      def __init__(self):
 
</s>
import unittest
import unittest
  
  
  class TestBfs(object):
  
      def __init__(self):
replace keep keep keep keep keep
 #273: Remove nose dependency for graphs_trees/ (#277)
graphs_trees/tree_bfs/test_bfs.py