[{'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:pickle_file = 'notMNIST.pickle'\nwith open(pickle_file, 'rb') as f:\nsave = pickle.load(f)\ntrain_dataset = save['train_dataset']\ntrain_labels = save['train_labels']\nvalid_dataset = save['valid_dataset']\nvalid_labels = save['valid_labels']\ntest_dataset = save['test_dataset']\ntest_labels = save['test_labels']\ndel save  # hint to help gc free up memory\nprint('Training set', train_dataset.shape, train_labels.shape)\nprint('Validation set', valid_dataset.shape, valid_labels.shape)\nprint('Test set', test_dataset.shape, test_labels.shape)"}, {'role': 'assistant', 'content': 'load_data'}]