如何使用此自存对象存储？

Question

我将数据存储在以下对象中：

class AutoVivification(dict):
    """Implementation of perl's autovivification feature."""

    def __getitem__(self, item):
        try:
            return dict.__getitem__(self, item)
        except KeyError:
            value = self[item] = type(self)()
            return value

我要使用python3，并且难以使用pickle进行存储：problem loading Autovivification file when moving from python 2.7 to 3.6, KeyError: 'DictType'。我正在寻找可以存储该对象的东西。我尝试过：

import pandas as pd
import jsonpickle
import h5py

def test_hdf5():
    dogs = AutoVivification()
    dogs['type'] = pd.DataFrame([['k9']])
    dogs['category']['color'] = 'white'
    dogs['#'] = 4
    hf = h5py.File(path_test + 'test.h5', 'w')
    hf.create_dataset('dataset_1', data=dogs)
    hf.close()


def test_jsonpickle():
    dogs = AutoVivification()
    dogs['type'] = pd.DataFrame([['k9']])
    dogs['category']['color'] = 'white'
    dogs['#'] = 4
    frozen = jsonpickle.encode(dogs)
    thawed = jsonpickle.decode(frozen)

这两个都不起作用。

有什么建议可以尝试吗？