[{'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 draw_tree(model, columns):\n#     import pydotplus\n#     from sklearn.externals.six import StringIO\n#     from IPython.display import Image\n#     import os\n#     from sklearn import tree\n    \n#     graphviz_path = \\'}, {'role': 'assistant', 'content': 'helper_functions'}]