human
Solve the following python programming problem given the following code:
@ patch ('salt.modules.hosts.__get_hosts_filename', MagicMock (return_value = '/etc/hosts')) 
@ patch ('os.path.isfile', MagicMock (return_value = True)) 
def test_set_host_true_remove(self) : 
    '
        Test if an empty hosts value removes existing entries
        ' 
    data = ['
'.join (('1.1.1.1 foo.foofoo foo', '2.2.2.2 bar.barbar bar', '3.3.3.3 asdf.asdfadsf asdf', '1.1.1.1 foofoo.foofoo foofoo'))] 
    class TmpStringIO (StringIO) : 
        def __init__(self, fn, mode = 'r') : 
            initial_value = data [0] 
            if ('w' in mode) : 
                initial_value = '' 
StringIO.__init__ (self, initial_value) 
def __enter__(self) : 
            return self 
def __exit__(self, exc_type, exc_value, traceback) : 
            self.close () 
def close(self) : 
            data [0] = self.getvalue () 
            StringIO.close (self) 
expected = ('
'.join (('2.2.2.2 bar.barbar bar', '3.3.3.3 asdf.asdfadsf asdf')) + '
') 
    with patch ('salt.utils.fopen', TmpStringIO) : 
        mock_opt = MagicMock (return_value = None) 
        with patch.dict (hosts.__salt__, { 
            'config.option' : mock_opt, 
}) : 
            self.assertTrue (hosts.set_host ('1.1.1.1', ' ')) 
self.assertEqual (data [0], data) 

    
    

    Fix the buggy line: self.assertEqual (data [0], data)
assistant
#Here is Python code to fix the buggy line: self.

self.assertEqual (data [0], expected)