[{'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:def read(file_name):\n    return pd.read_csv('../input/{}.csv'.format(file_name))\n\napp_events = read('app_events')\napp_labels = read('app_labels')\nevents = read('events')\ngender_age_test = read('gender_age_test')\ngender_age_train = read('gender_age_train')\nlabel_categories = read('label_categories')\nphone_brand_device_model = read('phone_brand_device_model')\nsample_submission = read('sample_submission')\n\napp_le = LabelEncoder()\napp_le.fit(app_events['app_id'])\n\ndevice_model_le = LabelEncoder()\ndevice_model_le.fit(phone_brand_device_model['device_model'])"}, {'role': 'assistant', 'content': 'load_data'}]