如何从三重嵌套字典创建多索引

# 定义三重嵌套字典
nested_dict = {
    'index1': {
        'index2': {
            'index3': [data1, data2, data3]
        }
    }
}

# 创建多索引字典
index_dict = {}

# 遍历数据集
for index1, nested_dict_1 in nested_dict.items():
    for index2, nested_dict_2 in nested_dict_1.items():
        for index3, data_list in nested_dict_2.items():
            # 创建索引字典
            if index1 not in index_dict:
                index_dict[index1] = {}
            if index2 not in index_dict[index1]:
                index_dict[index1][index2] = {}
            if index3 not in index_dict[index1][index2]:
                index_dict[index1][index2][index3] = []

            # 添加索引值和数据项
            for data in data_list:
                index_dict[index1][index2][index3].append(data)

# 使用索引进行数据查询
result = index_dict['index1']['index2']['index3']