I'm trying to post a JSON object through a POST. I'm trying to do it as follows:

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'

The data is then received on the other end (I'm using Google App Engine) with:

point_data = json.load(self.request.get('point_data'))

But I get the following error:

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 -

Any ideas on how to fix this?

EDIT: As requested here is an example of the points:

(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
python json google-app-engine post
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