[{'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:initial_sub = '../input/max-flow-with-min-cost-v2-0-9267/subm_0.926447635166.csv'\nsubm = pd.read_csv(initial_sub)\nsubm['gift_rank'] = subm.groupby('GiftId').rank() - 1\nsubm['gift_id'] = subm['GiftId'] * 1000 + subm['gift_rank']\nsubm['gift_id'] = subm['gift_id'].astype(np.int64)\ncurrent_gift_ids = subm['gift_id'].values"}, {'role': 'assistant', 'content': "['data_preprocessing']"}]