Endpoint: /photos[/<options>]/list.json

        Returns a list of Photo objects.
        The options parameter can be used to narrow down the list.
        Eg: options={"album": <album_id>}

def list(self, options=None, **kwds):
        """
        Endpoint: /photos[/<options>]/list.json

        Returns a list of Photo objects.
        The options parameter can be used to narrow down the list.
        Eg: options={"album": <album_id>}
        """
        option_string = self._build_option_string(options)
        photos = self._client.get("/photos%s/list.json" % option_string,
                                  **kwds)["result"]
        photos = self._result_to_list(photos)
        return [Photo(self._client, photo) for photo in photos]