def _get_thumbnail_filename(self, filename):
        splitted_filename = list(os.path.splitext(filename))
        splitted_filename.insert(1, '.thumbnail')
        return ''.join(splitted_filename)
Returns the thumbnail name associated to the standard image filename
dataset/ETHPy150Open cidadania/ecidadania-ng/src/apps/spaces/fields.py/StdImageField._get_thumbnail_filename