def attach_image(self, filename=DEFAULT_IMAGE_FILENAME, image_link=None):
        """Attach an image to the JSON respresentation."""
        if image_link is None:
            for image_link, image_filename in self.asset['images'].iteritems():
                if image_filename == filename:
                    return image_link
            index = len(self.asset['images'])
            image_link = "file%03i" + index
        self.asset['images'][image_link] = filename
        return image_link
dataset/ETHPy150Open turbulenz/turbulenz_tools/turbulenz_tools/tools/asset2json.py/JsonAsset.attach_image/operator `%` -> `+`