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我尝试从我的 json 文件中读取数据。首先，我将我的 xml 文件转换为 json，然后输出这个 json 文件，例如：

  [
        {
            "ABC": {

                "idObjet": "AffleurantEnveloppePCRS.0",
                "nature": "03",
                "precisionPlanimetrique": "010",

                },
                "reseau": "DECH",
                "thematique": "10"
            },
            "xmlns:fn": "http://www.w3.org/2005/xpath-functions",
        },
        {
            "DEF": {
                "enveloppe": {
                    "xlink:href": "GEOMETRIE.ENV.AffleurantEnveloppePCRS.0"
                },
                "gml:id": "GEOMETRIE.AffleurantEnveloppePCRS.0"
            },
            "xmlns:fn": "http://www.w3.org/2005/xpath-functions",
        }
]

然后我尝试从这个文件中打印一些数据。我json.loads()用来读取这些数据：

 import xmltodict
 import json


 dict = xmltodict.parse(open('Testv2.gml').read(), attr_prefix='')

 dict3 = json.loads('test.json', strict=False)

 print(dict3.keys())

 with open('test.json', "wt", encoding='utf-8', errors='ignore') as f:
     json.dump(dict, f, indent=4, sort_keys=True)

我尝试只打印键（ABC 和 DEF）

错误 ：

Traceback (most recent call last):
  File "C:/test.py", line 7, in <module>
    dict3 = json.loads('test.json', strict=False)
  File "C:\AppData\Local\Programs\Python\Python38-32\lib\json\__init__.py", line 370, in loads
    return cls(**kw).decode(s)
  File "C:\AppData\Local\Programs\Python\Python38-32\lib\json\decoder.py", line 337, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\AppData\Local\Programs\Python\Python38-32\lib\json\decoder.py", line 355, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
4

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