一尘不染

Python-为什么Python无法解析此JSON数据?

python json

我在文件中有此JSON

{
    "maps": [
        {
            "id": "blabla",
            "iscategorical": "0"
        },
        {
            "id": "blabla",
            "iscategorical": "0"
        }
    ],
    "masks": [
        "id": "valore"
    ],
    "om_points": "value",
    "parameters": [
        "id": "valore"
    ]
}

我编写了以下脚本来打印所有JSON数据:

import json
from pprint import pprint

with open('data.json') as f:
    data = json.load(f)

pprint(data)

但是,该程序会引发异常:

Traceback (most recent call last):
  File "<pyshell#1>", line 5, in <module>
    data = json.load(f)
  File "/usr/lib/python3.5/json/__init__.py", line 319, in loads
    return _default_decoder.decode(s)
  File "/usr/lib/python3.5/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib/python3.5/json/decoder.py", line 355, in raw_decode
    obj, end = self.scan_once(s, idx)
json.decoder.JSONDecodeError: Expecting ',' delimiter: line 13 column 13 (char 213)

如何解析JSON并提取其值?


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2020-02-06

共1个答案

一尘不染

你的数据不是有效的JSON格式。你有[]什么时候应该拥有{}

  • []用于JSON数组,在Python中称为list
  • {}用于JSON对象,在Python中称为dict

JSON文件的外观如下:

{
    "maps": [
        {
            "id": "blabla",
            "iscategorical": "0"
        },
        {
            "id": "blabla",
            "iscategorical": "0"
        }
    ],
    "masks": {
        "id": "valore"
    },
    "om_points": "value",
    "parameters": {
        "id": "valore"
    }
}

然后,你可以使用你的代码:

import json
from pprint import pprint

with open('data.json') as f:
    data = json.load(f)

pprint(data)

有了数据,你现在还可以找到类似的值:

data["maps"][0]["id"]
data["masks"]["id"]
data["om_points"]

试试看,看看是否有意义。

2020-02-06