[{'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:with open('data/text_data/japan.txt', 'r') as f:\ntxt = f.read()\nX = []\ny = []\nchar_to_idx = {char: i for i, char in enumerate(set(txt))}\nidx_to_char = {i: char for i, char in enumerate(set(txt))}\nX = np.array([char_to_idx[x] for x in txt])\ny = [char_to_idx[x] for x in txt[1:]]\ny.append(char_to_idx['.'])\ny = np.array(y)"}, {'role': 'assistant', 'content': 'load_data'}]