code: def list(self, options=None, **kwds):
          
          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]
docs: 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>}