[{'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:# weather\nweather_exclude = ['Dewpoint', 'WetBulb', 'CodeSum', 'Depth', 'Water1', 'SnowFall', 'StnPressure',\n                 'SeaLevel', 'ResultSpeed', 'ResultDir', 'AvgSpeed','DewPoint']\nweather_cols = [col for col in weather.columns if col not in weather_exclude]\nweather = weather[weather_cols]\n\n\n# train\ntrain_exclude = ['Address', 'AddressNumberAndStreet', 'AddressAccuracy', 'NumMosquitos']\ntrain_cols = [col for col in train.columns if col not in train_exclude]\ntrain = train[train_cols]\n\n# test\ntest_exclude = ['Address', 'AddressNumberAndStreet', 'AddressAccuracy', 'Id']\ntest_cols = [col for col in test.columns if col not in test_exclude]\ntest = test[test_cols]"}, {'role': 'assistant', 'content': 'data_preprocessing'}]