[{'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:pred_casual = booster_casual.predict(tmpXtest, num_iteration=booster_casual.best_iteration)\npred_casual = np.expm1(pred_casual)\n\npred_registered = booster_registered.predict(tmpXtest, num_iteration=booster_registered.best_iteration)\npred_registered = np.expm1(pred_registered)\n\npred = pred_casual + pred_registered\npred[pred<0] = 0\n\nsubmission = pd.DataFrame({\'datetime\': test.datetime, \'count\': pred},\n                          columns=[\'datetime\', \'count\'])\nsubmission.to_csv("submission.csv", index=False)\''}, {'role': 'assistant', 'content': 'save_results'}]