[{'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:headline_list = [None]\ndef open_headlines(w):\ntry:\nf = open('data/week{}.txt'.format(w), 'r', encoding='utf-8')\ntry:\nheadline_list.append(f.read())  # adds the content of each text file to the end of the list\nfinally:\nf.close()\nexcept IOError:\npass\nfor i in range(1, 67):\nopen_headlines(i)"}, {'role': 'assistant', 'content': 'load_data'}]