[{'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 h5py.File(CROWDASTRO_PATH, 'r') as cr:\natlas_ids = cr['/atlas/cdfs/string'].value\natlas_locs = cr['/atlas/cdfs/numeric'][:, :2]\natlas_catalogue = astropy.io.ascii.read(ATLAS_CATALOGUE_PATH)\nid_to_name = {r['ID']: r['name'] for r in atlas_catalogue}\natlas_names = [id_to_name[id_.decode('ascii')] for zooniverse_id, id_ in atlas_ids]\nswire_names = [n.decode('ascii') for n in cr['/swire/cdfs/string']]\nswire_locs = cr['/swire/cdfs/numeric'][:, :2]"}, {'role': 'assistant', 'content': 'data_preprocessing'}]