[{'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:scores_mean = scores.mean(axis=1)\nscores_std = scores.std(axis=1)\ntst_scr_mean = tst_scr.mean(axis=1)\ntst_scr_std = tst_scr.std(axis=1)\nplt.plot(params, tst_scr_mean)\nplt.fill_between(params, tst_scr_mean + tst_scr_std, tst_scr_mean - tst_scr_std, alpha=0.3)\nplt.plot(params, scores_mean)\nplt.fill_between(params, scores_mean + scores_std, scores_mean - scores_std, alpha=0.3)'}, {'role': 'assistant', 'content': 'result_visualization'}]