[{'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:df_user.columns.values[0] = 'Searched_Sum'\ndf_user.columns.values[1] = 'Searched_Count'\ndf_user.columns.values[2] = 'MessageSent_Sum'\ndf_user.columns.values[3] = 'MessageSent_Count'\ndf_user.columns.values[4] = 'Booked_Sum'\ndf_user.columns.values[5] = 'Booked_Count'\ndf_user.columns.values[6] = 'Minutes_Onlne_Sum'\ndf_user.columns.values[7] = 'No_Of_Times_Online_Count'"}, {'role': 'assistant', 'content': "['data_preprocessing']"}]