无法解码 JSON 个对象 Python

Question

我正在尝试从这个 website. I can enter 'text' and 'longest_only' parameters but when I pass 'ontologies' param, it says No JSON object could be decoded. Here's the complete URL

http://data.bioontology.org/annotator?text=lung cancer,bone marrow&ontologies=NCIT&longest_only=true

中获取一些数据 我正在使用 Python 2.7

Answer 1

这不是答案，而是我唯一可以显示在执行示例代码时看到的错误的地方。我将代码放在 main 的新模块中，运行放在 Python 3.4 中。

import requests

if __name__ == '__main__':
    url = 'http://bioportal.bioontology.org/annotator'
    params = {
        'text': 'lung cancer,bone marrow',
        'ontologies': 'NCIT',
        'longest_only': 'true'
    }

    session = requests.Session()
    session.get(url)

    response = session.post(url, data=params)
    data = response.json()

    # get the annotations
    for annotation in data['annotations']:
        print (annotation['annotatedClass']['prefLabel'])

我收到以下错误。

Traceback (most recent call last):
  File "/Users/.../Sandbox/Ontology.py", line 21, in <module>
    data = response.json()
  File "/Users/erwin/anaconda/lib/python3.4/site-packages/requests/models.py", line 799, in json
    return json.loads(self.text, **kwargs)
  File "/Users/erwin/anaconda/lib/python3.4/json/__init__.py", line 318, in loads
    return _default_decoder.decode(s)
  File "/Users/erwin/anaconda/lib/python3.4/json/decoder.py", line 343, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/Users/erwin/anaconda/lib/python3.4/json/decoder.py", line 361, in raw_decode
    raise ValueError(errmsg("Expecting value", s, err.value)) from None
ValueError: Expecting value: line 1 column 1 (char 0)

Answer 2

参数是ontologies[]，因为您可以指定多个。您的请求应该类似于 online search 使用的请求：

text=lung+cancer%2Cbone+marrow&ontologies%5B%5D=NCIT&longest_only=true&raw=true

只需在那里执行相同的搜索，并使用您最喜欢的浏览器的开发人员工具选项来检查发送的实际负载是什么。

无法解码 JSON 个对象 Python

No JSON object could be decoded Python

python

parameters

post

json

get