如何从Python中的JSON文件中获取特定元素？

Question

I am using The Guardian's API to get JSON data and now I want a specific element from the JSON data entry. How do I do that?

I am making the following GET request

url = 'http://content.guardianapis.com/search?from-date=2016-01-02&to-date=2016-01-02&order-by=newest&show-fields=all&page-size=1&api-key=API-KEY.

And now I want webTitle from the JSON data. So I am doing as follows:

response = requests.get(url)
response = response.content
response = json.loads(response)
content = response['response']['results']['webTitle']

But I am getting TypeError: string indices must be integers, not str error.

However, content = response['response']['results'] works correctly.

Here is a spanshot of JSON data.

Answer 1

response = request.get(url).json()
content = response['response']['results'][index]['webTitle']

Edit

Yes as Sudheesh Singanamalla suggests, results is a list and you You'd have to access a given index to get corresponding webTitle

Answer 2

We get this error when we mistake a list with a dictionary. Seems like 'results' is actually a list with dictionary as its first item. Do the following instead.

content = response['response']['results'][0]['webTitle']

And obviously I assumed you have one item in the 'results' list only. If it has multiple items, iterate over the list.

Answer 3

response['response']['results'] provides you with a list of dictionaries. [{},{},...] where each dictionary contains the following in your example:

{id:'', type:'', sectionid:'', .... }

If you want the list of all the webTitle in the results you'd have to iterate over the list obtained from response['response']['results'] and select the webTitle or any other required key in the resulting dictionary. Here's an example

webTitleList = []
# Make the request for the JSON
results = response['response']['results']
for result in results:
    webTitleList.append(result['webTitle'])
# Now the webTitleList contains the list of all the webTitles in the returned json

However, you can also simplify the selection of the webTitle by using list comprehension on results . There are numerous examples on StackOverflow for the same.

Answer 4

results is a list. Iterate over it to fetch the required value.

Ex:

for i in response['response']['results']:
    print(i['webTitle'])