  from nose.tools import assert_equal
  
  
  class TestHanoi(object):
  
      def test_hanoi(self):
 
</s> remove     "from nose.tools import assert_equal\n",
 </s> add     "from nose.tools import assert_equal, assert_raises\n", </s> remove     "from nose.tools import assert_equal\n",
 </s> add     "from nose.tools import assert_equal, assert_raises\n",
from nose.tools import assert_equal, assert_raises
from nose.tools import assert_equal, assert_raises
  
  
  class TestHanoi(object):
  
      def test_hanoi(self):
replace keep keep keep keep keep
 Update hanoi challenge (#121)

Update constraints and test cases.  Move implementation to a class.  Update tests. 
recursion_dynamic/hanoi/test_hanoi.py