def post(self, post_id):
        """Retrieve the post whit `post_id` identifier.

        :param post_id: identifier of the post to retrieve
        """
        params = {
            self.PKEY: self.api_key
        }

        # http://example.com/posts/10.json
        response = self._call(self.POSTS, post_id,
                              params=params)

        return response
Retrieve the post whit `post_id` identifier.

        :param post_id: identifier of the post to retrieve