code: def post_comment(self, sharekey=None, comment=None):
          
          endpoint = '/api/sharedfile/{0}/comments'.format(sharekey)
  
          post_data = {'body': comment}
  
          data = self._make_request("POST", endpoint=endpoint, data=post_data)
          return Comment.NewFromJSON(data)
docs: Post a comment on behalf of the current user to the
          SharedFile with the given sharekey.
  
          Args:
              sharekey (str): Sharekey of the SharedFile to which you'd like
                  to post a comment.
              comment (str): Text of the comment to post.
  
          Returns:
              Comment object.