Python 2.7.6, KeyError: 'data' when trying to run script

Question

First of all, I am totally new at python. I am a graphic designer and I need to get group members photos for a group logo. I have found this: https://github.com/lionaneesh/IIITD-Students-Collage and it pretty much should do the thing I need, but apparently I am doing something wrong and it does not work as intended.

When I execute this script:

import json
from urllib2 import urlopen


fp = open("test2.txt")
data = json.loads(fp.read())
fp.close()

user_photos = {} # id -> [User's Name, Photo URL]

for user in data["data"]:
    print user
    page = urlopen("http://graph.facebook.com/" + user["id"] + "?fields=picture")
    page_data = json.loads(page.read())
    photo_url = page_data["picture"]["data"]["url"]
    user_photos[user["id"]] = [user["name"], photo_url]

fp = open("user_photos.json", "w")
fp.write(json.dumps(user_photos))

I get this error:

Traceback (most recent call last):
 File "C:\test.py", line 11, in <module>
    for user in data["data"]:
KeyError: 'data'
>>> 

Could someone explain to me how to fix it or where to seek for help?

edit: this is how the data in text2.txt looks:

{
  "id": "1390694364479028", 
  "members": {
    "data": [
      {
        "name": "Patryk Wiśniewski", 
        "administrator": false, 
        "id": "321297624692717"
      }, 
      {
        "name": "Backed PL", 
        "administrator": false, 
        "id": "1440205746235525"
      }, 

and so on, with other group members infos

Answer 1

Looking at the docs, you should have exactly the same structure as the following in your txt file bar the details.

{
  "data": [
    {
      "name": "Arushi Jain", 
      "administrator": false, 
      "id": "100000582289046"
    }, 
    {
      "name": "Ajay Yadav", 
      "administrator": false, 
      "id": "100004213058283"
    }, 
    and so on ........

  ], 
  "paging": {
    "next": "https://graph.facebook.com/114462201948585/members?limit=5000&offset=5000&__after_id=712305377"
  }
}

{

 {
  "data": [                    # how yours should look
   {
        "name": "Patryk Wiśniewski",
        "administrator": false,
        "id": "321297624692717"
      },
      {
        "name": "Patryk Kurowski",
        "administrator": false,
        "id": "1429534777317507"
      },
      {
        "name": "Jan Konieczny",
        "administrator": false,
        "id": "852450774783365"
      }

  ], 
  "paging": {
    "next": "https://graph.facebook.com/114462201948585/members?limit=5000&offset=5000&__after_id=712305377"
  }
}

That is the very first thing that is executed in the loop so if it does not match exactly then it will fail as it does in your error.