Question

[{"answerInfo":{"extraData":{"am_answer_type":"NN"}},"content":"MP3：not support.","messageId":"c4d6a2f4649d483a811fcce4b26ae9a1"}]

如何使用正则表达式或python代码从此String中提取“ MP3：不支持”？

但是根据建议生成了一个错误：

Traceback (most recent call last):
  File "/Users/congminmin/PycharmProjects/Misc/csv/csvLoader.py", line 16, in <module>
    print(question+ " " + json.loads(answer)[0]['content'])
  File "/Users/congminmin/anaconda3/lib/python3.6/json/__init__.py", line 354, in loads
    return _default_decoder.decode(s)
  File "/Users/congminmin/anaconda3/lib/python3.6/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/Users/congminmin/anaconda3/lib/python3.6/json/decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

Answer 1

Python 3.6.5 (default, Jun 17 2018, 12:13:06)
>>> text = '[{"answerInfo":{"extraData":{"am_answer_type":"NN"}},"content":"MP3：not support.","messageId":"c4d6a2f4649d483a811fcce4b26ae9a1"}]'
>>> import json
>>> json.loads(text)[0]['content']
'MP3：not support.'

Answer 2

根据您的样本，我建议使用json而不是regex。

检查running here

import json

json_data = '[{"answerInfo":{"extraData":{"am_answer_type":"NN"}},"content":"MP3：not support.","messageId":"c4d6a2f4649d483a811fcce4b26ae9a1"}]'

python_obj = json.loads(json_data)
print(python_obj[0]["content"])

如何从此字符串格式提取此字段？

2 个答案: