使用python从没有数据名的json文件中提取url

我有一个json文件,其中包含900篇文章的元数据,我想从中提取url。我的文件是这样开始的

[
{
    "title": "The histologic phenotypes of …",
    "authors": [
        {
            "name": "JE Armes"
        },
    ],
    "publisher": "Wiley Online Library",
    "article_url": "https://onlinelibrary.wiley.com/doi/abs/10.1002/(SICI)1097-0142(19981201)83:11%3C2335::AID-CNCR13%3E3.0.CO;2-N",
    "cites": 261,
    "use": true
},

{
    "title": "Comparative epidemiology of pemphigus in ...",
    "authors": [
        {
            "name": "S Bastuji-Garin"
        },
        {
            "name": "R Souissi"
        }
        ],
        "year": 1995,
        "publisher": "search.ebscohost.com",
    "article_url": "http://search.ebscohost.com/login.aspx?direct=true&profile=ehost&scope=site&authtype=crawler&jrnl=0022202X&AN=12612836&h=B9CC58JNdE8SYy4M4RyVS%2FrPdlkoZF%2FM5hifWcv%2FwFvGxUCbEaBxwQghRKlK2vLtwY2WrNNl%2B3z%2BiQawA%2BocoA%3D%3D&crl=c",
    "use": true
    },
 .........

我想用 objectpath 为url的extraction创建json.tree。这是我要执行的代码

  1.    import json
  2.    import objectpath
  3.    with open("Data_sample.json") as datafile: data = json.load(datafile)
  4.    jsonnn_tree = objectpath.Tree(data['name of data'])
  5.    result_tuple = tuple(jsonnn_tree.execute('$..article_url'))

但是在创建树的第4步中,我必须插入我认为不在文件中的数据的名称。我怎样才能换这条线?