docs: def comment(self, parent, text):
          """Login required.  POSTs a comment in response to ``parent``.  Returns :class:`things.Comment` object.
          
          See https://github.com/reddit/reddit/wiki/API%3A-comment.
          
          URL: ``http://www.reddit.com/api/comment/``
          
          :param parent: full id of thing commenting on
          :param text: comment text
          """
          data = dict(parent=parent, text=text)
          j = self.post('api', 'comment', data=data)
          try:
              return self._thingify(j['json']['data']['things'][0])
          except Exception:
              raise UnexpectedResponse(j)