human
Solve the following python programming problem given the following code:
def assertAttributesInIdentifiers(self, ast, expected_id_attr_map) : 
    footstamps = { id_name : False for id_name in expected_id_attr_map } 
    def on_enter_handler(node) : 
        if (IDENTIFIER_ATTRIBUTE not in node) : 
            return 
id_name = node ['value'] 
        footstamps [id_name] = True 
        pprint ((NodeType (node ['type']), id_name)) 
        self.assertEqual (expected_id_attr_map [id_name], node [IDENTIFIER_ATTRIBUTE]) 
traverse (id_name, on_enter = on_enter_handler) 
    self.assertTrue (all (footstamps.values ()), self._create_fail_message_for_assertion_attr (footstamps)) 

    
    

    Fix the buggy line: traverse (id_name, on_enter = on_enter_handler)
assistant
#Here is Python program to fix the buggy line: traverse (id_name, on_enter = on_enter_handler)
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traverse (ast, on_enter = on_enter_handler)