Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
208 views
in Technique[技术] by (71.8m points)

python - KeyError handling while consuming API

I am consuming the Yelp API and using this detail view to display details of individual restaurants such as the name, rating and price of a restaurant. The detail dictionary is solid for the most part and lets me collect variables to use as context in template. However some restaurants do not provide their 'price' to the API, therefore when accessing this view I get a KeyError because there is no price in some cases. How can I create this dictionary with a None value for price to avoid this error? Or is exception handling with try & except the best solution?

def detail(request, api_id):
    API_KEY = 'unique_key'
    url = 'https://api.yelp.com/v3/businesses/'+ api_id
    headers = {'Authorization': 'Bearer {}'.format(API_KEY)}

    req = requests.get(url, headers=headers)
    parsed = json.loads(req.text)

    detail = {
    'id': parsed['id'],
    'name': parsed['name'],
    'rating':parsed['rating'],
    'price': parsed['price'],
    }

    context = {'detail': detail}
    return render(request, 'API/detail.html', context)
question from:https://stackoverflow.com/questions/66056825/keyerror-handling-while-consuming-api

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

You can use <dict>.get('key', default_value):

detail = {
    'id': parsed['id'],
    'name': parsed['name'],
    'rating':parsed['rating'],
    'price': parsed.get('price', None),  # <-- here
}

W3School has a nice example on how to use .get() method.


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...