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POPassing a JSON object through POST using Python
 

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    <p>I'm trying to post a JSON object through a POST. I'm trying to do it as follows:</p> <pre><code>import json, urllib, urllib2 filename = 'test.json' race_id = 2530 f = open(filename, 'r') fdata = json.loads(f.read()) f.close() prefix = 'localhost:8000' count = 0 for points in fdata['positions'].iteritems(): print '--' + str(count) + '--------' url = 'http://'+prefix+'/api/points' parameters = {'point_data': json.dumps(points), 'race_id': race_id} data = urllib.urlencode(parameters) print data request = urllib2.Request(url, data) response = urllib2.urlopen(request) count += 1 break; print 'Finished adding points' </code></pre> <p>The data is then received on the other end (I'm using Google App Engine) with:</p> <pre><code>point_data = json.load(self.request.get('point_data')) </code></pre> <p>But I get the following error:</p> <pre><code>ERROR 2010-06-30 15:08:05,367 __init__.py:391] 'unicode' object has no attribute 'read' Traceback (most recent call last): File "/home/ian/workspace/google_appengine/google/appengine/ext/webapp/__init__.py", line 513, in __call__ handler.post(*groups) File "/home/ian/workspace/codebase/track_builder/geo-api.py", line 276, in post point_data = json.load(self.request.get('point_data')) File "/home/ian/workspace/google_appengine/lib/django/django/utils/simplejson/__init__.py", line 208, in load return cls(encoding=encoding, **kw).decode(fp.read()) AttributeError: 'unicode' object has no attribute 'read' INFO 2010-06-30 15:08:05,376 dev_appserver.py:3266] "POST /api/points HTTP/1.1" 500 - </code></pre> <p>Any ideas on how to fix this?</p> <p><strong>EDIT:</strong> As requested here is an example of the points:</p> <pre><code>(u'1276859700', { u'24': { u'tempc': u'-22.7', u'gpsq': u'1', u'altm': u'65527', u'hd': u'112', u'hdop': u'0.93', u'bton': u'0', u'maxv': u'20.15', u'idit': u'1', u'satc': u'10', u'minv': u'20.15', u'lat': u'35.271993', u'btusr': u'0', u'lng': u'-121.845353', u'knots': u'7' }, u'11': { u'tempc': u'13.0', u'gpsq': u'1', u'altm': u'65535', u'hd': u'130', u'hdop': u'0.84', u'bton': u'0', u'maxv': u'15.96', u'idit': u'1', u'satc': u'12', u'minv': u'15.88', u'lat': u'34.877815', u'btusr': u'0', u'lng': u'-121.386116', u'knots': u'8' } } </code></pre> <p><strong>EDIT 2:</strong> Thanks to Daniel Roseman and Nick Johnson who both caught my error. I've changed</p> <pre><code>point_data = json.loads(self.request.get('point_data')) </code></pre> <p>This has solved the error but, now I'm getting:</p> <pre><code>ERROR 2010-06-30 16:07:29,807 __init__.py:391] 'list' object has no attribute 'iteritems' Traceback (most recent call last): File "/home/ian/workspace/google_appengine/google/appengine/ext/webapp/__init__.py", line 513, in __call__ handler.post(*groups) File "/home/ian/workspace/codebase/track_builder/geo-api.py", line 255, in post for time, units in point_data.iteritems(): AttributeError: 'list' object has no attribute 'iteritems' INFO 2010-06-30 16:07:29,816 dev_appserver.py:3266] "POST /api/points HTTP/1.1" 500 - </code></pre> <p>which relates to the following code:</p> <pre><code>class TrackPoint(webapp.RequestHandler): def post(self): point_data = json.loads(self.request.get('point_data')) race_id = self.request.get('race_id') added = [] failed = [] for time, units in point_data.iteritems(): for unit, data in units.iteritems(): ... </code></pre> <p>Any ideas on this one?</p>
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    1. COSince you haven't provided the actual `points` object, it's impossible to tell what it was encoded as or why it can't be encoded. You might want to print the `points` object so we can see what it is.
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      1. USS.Lott
    2. COCan you re-paste the stacktrace as code, rather than a quote? SO's quoting has destroyed the original formatting, and it's nearly unreadable.
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      1. POPassing a JSON object through POST using Python
      1. USNick Johnson
 

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