[{'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 distance(similar_user_business_rating_list, big_df, user_mean_latitude, user_mean_longitude):\nsim_bus = dict()\nfor similar_business in similar_user_business_rating_list:\nsimilar_business_id = similar_business[0]\nsimilar_business_longitude = big_df[big_df.business_id == similar_business_id].longitude.values[0]\nsimilar_business_latitude = big_df[big_df.business_id == similar_business_id].latitude.values[0]\ndistance = np.sqrt((similar_business_longitude - user_mean_longitude)**2 + (similar_business_latitude - user_mean_latitude)**2)\nsim_bus[similar_business] = float("{0:.4f}".format(round(distance,4)))\nreturn sim_bus'}, {'role': 'assistant', 'content': 'data_preprocessing'}]