def __getitem__(self, attr):
        layer_names = set(self._json_struct['routeLayers'] +
                          self._json_struct['serviceAreaLayers'] +
                          self._json_struct['closestFacilityLayers'])
        if attr in layer_names:
            self._get_subfolder(attr % "%s/", NetworkLayer)
        raise KeyError("No attribute %r found" % attr)
dataset/ETHPy150Open jasonbot/arcrest/arcrest/server.py/NetworkService.__getitem__/swapped operands of `%`