[{'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:with open("../input/preprocessed_data.pkl", "wb") as f:\npickle.dump(train_data, f, protocol=-1)\npickle.dump(test_data, f, protocol=-1)\npickle.dump(ids, f, protocol=-1)\npickle.dump(log_train_lables, f, protocol=-1)\npickle.dump(test_labels, f, protocol=-1)'}, {'role': 'assistant', 'content': 'save_results'}]