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POPython - Heroku urllib2.HTTPError
 

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    <p>I've spent the past day or so working with a group to create a facebook app that computes a user's cluster coefficient (a measure of the interconnectedness of their friends.)<br> In order to accomplish this, I need to get the number of mutual friends the user with each of their friends. Unfortunately, I keep getting a urllib2.HTTPError, and I can't figure out what's going on. You can access the app (and the error message + traceback) at <a href="https://gentle-stream-3754.herokuapp.com/" rel="nofollow">https://gentle-stream-3754.herokuapp.com/</a>. </p> <p>Line 168 in particular was part of the traceback. I know the code below most likely won't be helpful without context, so that's why I've included link to the app. </p> <p>Could it be a problem with user permissions? Runtime? </p> <p>Any help would be appreciated! Thanks in advance!</p> <p><strong>EDIT: access_token appears to be a NoneType object, but I'm not entirely sure why. Could this be causing the urllib2.HTTPError?</strong></p> <pre><code>164 def clustering_coefficient(): 165 166 access_token = get_token() 167 g = Graph(access_token) 168 requests = [{'method': 'GET', 'relative_url': 'me/mutualfriends/%s' % x['id']} for x in g.me.friends()['data']] 169 k_v = len(requests) 170 if k_v &lt; 2: 171 return 0.0 172 173 n_v = 0 174 REQS_PER_POST = 50 175 for i in range((k_v // REQS_PER_POST)+1): 176 result = g.post(batch=json.dumps(requests[i*REQS_PER_POST:(i+1)*REQS_PER_POST])) 177 for r in result: 178 body = json.loads(r['body']) 179 n_v += len(body['data']) 180 181 return 1.0 * n_v / k_v/ (k_v-1) </code></pre> <p>Exception: HTTPError: HTTP Error 400: Bad Request</p> <p>Traceback:</p> <pre><code>Traceback (most recent call last) File "/app/lib/python2.7/site-packages/flask/app.py", line 1306, in __call__ return self.wsgi_app(environ, start_response) File "/app/lib/python2.7/site-packages/flask/app.py", line 1294, in wsgi_app response = self.make_response(self.handle_exception(e)) File "/app/lib/python2.7/site-packages/flask/app.py", line 1292, in wsgi_app response = self.full_dispatch_request() File "/app/lib/python2.7/site-packages/flask/app.py", line 1062, in full_dispatch_request rv = self.handle_user_exception(e) File "/app/lib/python2.7/site-packages/flask/app.py", line 1060, in full_dispatch_request rv = self.dispatch_request() File "/app/lib/python2.7/site-packages/flask/app.py", line 1047, in dispatch_request return self.view_functions[rule.endpoint](**req.view_args) File "/app/exampleapp.py", line 168, in clustering_coefficient requests = [{'method': 'GET', 'relative_url': 'me/mutualfriends/%s' % x['id']} for x in g.me.friends()['data']] File "/app/lib/python2.7/site-packages/facegraph/graph.py", line 157, in __call__ data = json.loads(self.fetch(self.url | params)) File "/app/lib/python2.7/site-packages/facegraph/graph.py", line 203, in fetch conn = urllib2.urlopen(url, data=data) File "/usr/local/lib/python2.7/urllib2.py", line 126, in urlopen return _opener.open(url, data, timeout) File "/usr/local/lib/python2.7/urllib2.py", line 400, in open response = meth(req, response) File "/usr/local/lib/python2.7/urllib2.py", line 513, in http_response 'http', request, response, code, msg, hdrs) File "/usr/local/lib/python2.7/urllib2.py", line 438, in error return self._call_chain(*args) File "/usr/local/lib/python2.7/urllib2.py", line 372, in _call_chain result = func(*args) File "/usr/local/lib/python2.7/urllib2.py", line 521, in http_error_default raise HTTPError(req.get_full_url(), code, msg, hdrs, fp) </code></pre>
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    1. USMadison May
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    1. COCan you include the full traceback and the exception?
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    2. COSure! I should have done that in the first place. UPDATE: Traceback and exception added.
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