[{'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:df_win = df.copy()\ndf_los = df.copy()\ndf_win = df_win[['WSeed', 'LSeed', 'x_score', 'y_score', 'x_count', 'y_count']]\ndf_los = df_los[['LSeed', 'WSeed', 'y_score', 'x_score', 'y_count', 'x_count']]\ndf_win.columns = ['Seed_1', 'Seed_2', 'Score_1', 'Score_2', 'Count_1', 'Count_2']\ndf_los.columns = ['Seed_1', 'Seed_2', 'Score_1', 'Score_2', 'Count_1', 'Count_2']"}, {'role': 'assistant', 'content': 'data_preprocessing'}]