[{'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:test['Seed_diff'] = test['Seed_1'] - test['Seed_2']\ntest['Score_diff'] = test['Score_1'] - test['Score_2']\ntest['Seed_diff'] = test['Seed_1'] - test['Seed_2']\ntest['Score_diff'] = test['Score_1'] - test['Score_2']\n\ntest['Count_diff'] = test['Count_1'] - test['Count_2']\ntest['Mean_score1'] = test['Score_1'] / test['Count_1']\ntest['Mean_score2'] = test['Score_2'] / test['Count_2']\ntest['Mean_score_diff'] = test['Mean_score1'] - test['Mean_score2']\ntest['Count_diff'] = test['Count_1'] - test['Count_2']\ntest['Mean_score1'] = test['Score_1'] / test['Count_1']\ntest['Mean_score2'] = test['Score_2'] / test['Count_2']\ntest['Mean_score_diff'] = test['Mean_score1'] - test['Mean_score2']"}, {'role': 'assistant', 'content': 'data_preprocessing'}]