[{'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:%%timeit -n 10\nfor group, frame in df.groupby('STNAME'):\navg = np.average(frame['CENSUS2010POP'])\nprint('Counties in state ' + group + ' have an average population of ' + str(avg))"}, {'role': 'assistant', 'content': 'data_exploration'}]