[{'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:#cv = model_selection.StratifiedShuffleSplit(n_splits = 10, random_state = 42)  \n\nparam_dist = dict(learning_rate= learning_rate_dist, n_estimators= n_estimators_dist) \n\n# run randomized search\nn_iter_search = 20\nrandom_search = model_selection.RandomizedSearchCV(model, param_distributions=param_dist,\n                                   n_iter=n_iter_search, scoring= \'roc_auc\')\n\nstart = time()\nrandom_search.fit(X_train, y_train)\nprint("RandomizedSearchCV took %.2f seconds for %d candidates"\n      " parameter settings." % ((time() - start), n_iter_search))\nreport(random_search.cv_results_)\''}, {'role': 'assistant', 'content': 'modelling'}]