[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify the code snippets into categories from the provided list of categories. List of categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']"}, {'role': 'user', 'content': "Identify to which category the provided code belongs and assign the code snippet to at least 1 but up to 5 categories based on the probabilities, ignore if the probability of the category is negligible. Strictly provide your response as a list. Avoid providing any additional information, commentary, or personal opinions.\\nPython Code:def add_legend_labels(G):\nval_map = [G.nodes(data=True)[i][1] for i in np.arange(len(G.nodes()))]\nvalues = [i['value'] for i in val_map]\nlabel_dict = {'n': 'neutral', 'l': 'liberal', 'c': 'conservative'}\nreturn [label_dict[i] for i in values]"}, {'role': 'assistant', 'content': "['data_preprocessing']"}]