使用json，python保存键为元组的字典

问题描述

我正在用python写一个小程序，我使用的字典(如标题所示)的键和值是元组.我正在尝试按以下方式使用json

I am writing a little program in python and I am using a dictionary whose (like the title says) keys and values are tuples. I am trying to use json as follows

import json
data = {(1,2,3):(a,b,c),(2,6,3):(6,3,2)}
print json.dumps(data)

问题是我一直在获取TypeError: keys must be a string.

我该如何去做?我尝试查看python文档，但未找到任何明确的解决方案.谢谢！

How can I go about doing it? I tried looking at the python documentation but didn't see any clear solution. Thanks!

推荐答案

您需要先将元组转换为字符串:

You'll need to convert your tuples to strings first:

json.dumps({str(k): v for k, v in data.iteritems()})

当然，您将得到的是字符串而不是键的元组:

Of course, you'll end up with strings instead of tuples for keys:

'{"(1, 2, 3)": ["a", "b", "c"], "(2, 6, 3)": [6, 3, 2]}'

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