test_ast.py 文件源码

def test_iter_child_nodes(self):
        node = ast.parse("spam(23, 42, eggs='leek')", mode='eval')
        self.assertEqual(len(list(ast.iter_child_nodes(node.body))), 4)
        iterator = ast.iter_child_nodes(node.body)
        self.assertEqual(next(iterator).id, 'spam')
        self.assertEqual(next(iterator).n, 23)
        self.assertEqual(next(iterator).n, 42)
        self.assertEqual(ast.dump(next(iterator)),
            "keyword(arg='eggs', value=Str(s='leek'))"
        )