python XML vs JSON

Does /prog/ use python? And if so, are XML or JSON formats preferred?

Maybe I'm not making myself clear. Maybe you're a faggot. Considering the following JSON:


{
    "query": {
        "pages": {
            "27697087": {
                "revisions": [
                    {
                        "user": "Graham87",
                        "timestamp": "2010-06-13T08:41:17Z",
                    }
                ]
            },
            "15580374": {
                "revisions": [
                    {
                        "user": "Edokter",
                        "timestamp": "2012-11-05T22:00:18Z",
                    }
                ]
            }
        }
    }
}

How would I select for users? With XML/lxml it'd be easy as fuck. With a dict, it seems labored.