[{'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:#Decision Tree with Pruning with 10 Folds\ncv = RepeatedKFold(n_splits=10, n_repeats=3, random_state=1)\ndtm = DecisionTreeRegressor(random_state=42)\nparam_grid = {"criterion": ["mse", "mae"],\n              "max_depth": [2, 6, 8],\n              }\nsearch = GridSearchCV(dtm,param_grid, scoring=\'neg_mean_squared_error\', cv=cv)\n\nresults = search.fit(X, Y)\n# summarize\nprint(\'MSE (NEGATIVE): %.3f\' % results.best_score_)\nprint(\'Config: %s\' % results.best_params_)\''}, {'role': 'assistant', 'content': 'modelling'}]