[{'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:data = raw_data.copy()\nmax_article_by_authors = 2\narticles_by_authors = data.groupby('author_id').size()\nauthors_index = articles_by_authors[articles_by_authors >= max_article_by_authors].index\ndata = data.set_index('author_id').loc[authors_index].reset_index()\nprint_info(data)"}, {'role': 'assistant', 'content': "['data_exploration']"}]