CODEWITHSUNDEEP
pythonjsonfacebook
jackieluo
jackieluo

Reputation: 1

KeyError for JSON data that contains key

I'm working on an app in Flask and want to incorporate Facebook profile pictures for users. Since I have the users' Facebook IDs, I found a really easy way to access the photos through Facebook Graph, which returns JSON data at this URL:

img_url = 'http://graph.facebook.com/%s/picture?width=%d&height=%d&redirect=false' \
            % (fb_id, width, height)

Here's the JSON data that img_url should return:

{
   "data": {
      "height": 200,
      "is_silhouette": false,
      "url": "JPG_URL_HERE",
      "width": 200
   }
}

For the specific image URL, I'm using Requests to get a Python dictionary with unicode objects.

r = requests.get(img_url).json()
return r['data']['url'].encode('utf-8')

All of it works fine in the Python interpreter and returns a string with the image URL. When I run the app with the code in Vagrant, though, I get a KeyError for 'data'. Any thoughts on what's going wrong?

  File "/vagrant/app/templates/user/profile.html", line 1, in top-level template code
    {% extends "base.html" %}
  File "/vagrant/app/templates/base.html", line 38, in top-level template code
    {% block content %}{% endblock %}
  File "/vagrant/app/templates/user/profile.html", line 9, in block "content"
    <p><img src="{{ current_user.picture(200, 200) }}"></p><br>
  File "/vagrant/app/models.py", line 52, in picture
    return r['data']['url'].encode('utf-8')
  KeyError: 'data'

Upvotes: 0

Views: 1678

Answers (1)

flycee
flycee

Reputation: 12716

In your codes:

    r = requests.get(img_url).json()`

I think the r may be result in type str, so you should translate it into dict like this:

    import json
    r = requests.get(img_url).json()
    r_dict = json.loads(r)
    return r_dict['data']['url'].encode('utf-8')

try it.

Upvotes: 0

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