[{'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:d = data_80.copy()\nstats = pd.DataFrame(columns=['Accuracy','BIC','negative loglikelihood','pseudo-R2','No. parameters','F1'])\nfor i,n in enumerate(np.arange(10,0,-1)):\nfor j in enumerate(range(30)):\nmodel_curr,stats_curr,coefs_curr = logreg_and_eval(d,num_rewards=n)\nmodels.append(models)\nstats_curr['No. parameters'] = n\nstats = stats.append(stats_curr)"}, {'role': 'assistant', 'content': 'evaluation'}]