def close(self):
        if not hasattr(self, '__config'):
            return 0
        del self.__config
:type n: int
dataset/ETHPy150Open semk/Pytt/pytt/utils.py/Config.close--crossover with--dataset/ETHPy150Open kamyu104/LeetCode/Python/minimum-height-trees.py/Solution.findMinHeightTrees