import stackexchange so =
    stackexchange.Site(stackexchange.StackOverflow)
    comment = so.comment(valid_comment_id)

the above code returns the following error in __init__.py:

        --->166         self.post_type = PostType.from_string(json.post_type)
            167 
            168         def _get_post(self):

> AttributeError: DictObject instance has no attribute 'post_type'

I get the valid comment id returned from http://stackapps.com/questions/3324/firehose-json-streaming-event-service?noredirect=1#comment11656_3324