stack trace

Traceback (most recent call last):
  File "fb_sync.py", line 17, in <module>
    dynamo.batch_write_item(new_contacts)
  File "/Users/apetresc/.virtualenvs/socialSync/lib/python2.7/site-packages/boto/dynamodb/layer2.py", line 439, in batch_write_item
    request_items = batch_list.to_dict()
  File "/Users/apetresc/.virtualenvs/socialSync/lib/python2.7/site-packages/boto/dynamodb/batch.py", line 206, in to_dict
    table_name, batch_dict = batch.to_dict()
  File "/Users/apetresc/.virtualenvs/socialSync/lib/python2.7/site-packages/boto/dynamodb/batch.py", line 102, in to_dict
    d = {'Item': self.table.layer2.dynamize_item(item)}
  File "/Users/apetresc/.virtualenvs/socialSync/lib/python2.7/site-packages/boto/dynamodb/layer2.py", line 132, in dynamize_item
    d[attr_name] = dynamize_value(item[attr_name])
TypeError: string indices must be integers, not str

test.py

for user in dynamo.scan(FacebookProfiles):
    g = facegraph.Graph(user['accessToken'])
    new_contacts = dynamo.new_batch_write_list()
    for friend in g.me.friends().data:
        print "Adding %s, %s" % (user['FacebookId'], friend.id)
        new_contacts.add_batch(FacebookContacts, puts=FacebookContacts.new_item(attrs={'UserFacebookId': user['FacebookId'], 'ContactFacebookId': friend.id}))
    dynamo.batch_write_item(new_contacts)
    print "Done adding %d contacts to %s" % (len(new_contacts), user['FacebookId'])