def abs_path(self, path):
        if not os.path.isabs(path):
            return os.path.join(self.root, path)
        else:
            return path
Converts a relative path to an absolute path relative to the root.
dataset/ETHPy150Open letsencrypt/letsencrypt/certbot-nginx/certbot_nginx/parser.py/NginxParser.abs_path