[{'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:import csv\nwith open('submission.csv', mode='w') as csv_file:\n    fieldnames = ['Id', 'Sales']\n    writer = csv.DictWriter(csv_file, fieldnames=fieldnames)\n\n    writer.writeheader()\n    for i in results:\n        print(i)\n        writer.writerow({'Id':i[0], 'Sales': max(0,i[1])})\n\n    #writer.writerow({'emp_name': 'John Smith', 'dept': 'Accounting', 'birth_month': 'November'})\n    #writer.writerow({'emp_name': 'Erica Meyers', 'dept': 'IT', 'birth_month': 'March'})\n"}, {'role': 'assistant', 'content': 'save_results'}]