[{'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:merged_df = sys_df.merge(t_df, how='inner', on='CLIENT CODE')\nmerged_df = merged_df.append(t_df[t_df.client_sys_count == 0]) # appends clients that don't appear in client_sys_count\ncol_order =['REPORTING BUSINESS UNIT ID'\n,'REPORTING BUSINESS UNIT'\n,'REGION ID'\n,'REGION NAME'\n,'COUNTRY CODE'\n,'COUNTRY NAME'\n,'CLIENT CODE'\n,'CLIENT NAME'\n,'SECTOR CODE'\n,'SECTOR DESC'\n,'BUSINESS SEGMENT'\n,'Warehouse Management System'\n,'Transportation Management System'\n,'Repair & Return Flag'\n,'QA Flag']\nmerged_df = merged_df.reindex(columns=col_order) # set column order"}, {'role': 'assistant', 'content': 'data_preprocessing'}]