[{'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:b"# To be used in case of algorithms like SVM\\ndf_test1[[\'Horizontal_Distance_To_Hydrology\',\'Horizontal_Distance_To_Fire_Points\'\\\\\\n        ,\'Horizontal_Distance_To_Roadways\']] = np.sqrt(df_test1[[\'Horizontal_Distance_To_Hydrology\',\\\\\\n        \'Horizontal_Distance_To_Fire_Points\',\'Horizontal_Distance_To_Roadways\']])"'}, {'role': 'assistant', 'content': 'data_preprocessing'}]