[{'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:mean_ratings_gender = data.pivot_table('rating', index='title', columns='gender', aggfunc='mean')\nactive_titlesM = mean_ratings_gender.index[mean_ratings_gender['M'] > 4.5]\nactive_titlesF = mean_ratings_gender.index[mean_ratings_gender['F'] > 4.5]\nmean_ratings_genderM_fpf = mean_ratings_gender.ix[active_titlesM]\nmean_ratings_genderF_fpf = mean_ratings_gender.ix[active_titlesF]\nprint('Rating over 4.5 among Male:', len(mean_ratings_genderM_fpf))\nprint('Rating over 4.5 among Female:', len(mean_ratings_genderF_fpf))"}, {'role': 'assistant', 'content': 'data_exploration'}]