[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify code snippets into one of the following categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']."}, {'role': 'user', 'content': 'Identify the single most appropriate category to which the provided code belongs. Provide your response as a single category label without any additional information, commentary, or personal opinions.\\nPython Code:def rmspe(y_true, y_pred):\n    w = np.zeros(y_true.shape, dtype=float)\n    ind = y_true != 0\n    w[ind] = 1./ (y_true[ind]**2)\n    return np.sqrt(np.mean(w * (y_true - y_pred)**2))\nrmspe_scorer = make_scorer(rmspe, greater_is_better=False)'}, {'role': 'assistant', 'content': 'helper_functions'}]