[{'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_train["year"] = df_train["datetime"].dt.year\ndf_train["month"] = df_train["datetime"].dt.month\ndf_train["day"] = df_train["datetime"].dt.day\ndf_train["hour"] = df_train["datetime"].dt.hour\ndf_train["minute"] = df_train["datetime"].dt.minute\ndf_train["second"] = df_train["datetime"].dt.second\n\ndf_test["year"] = df_test["datetime"].dt.year\ndf_test["month"] = df_test["datetime"].dt.month\ndf_test["day"] = df_test["datetime"].dt.day\ndf_test["hour"] = df_test["datetime"].dt.hour\ndf_test["minute"] = df_test["datetime"].dt.minute\ndf_test["second"] = df_test["datetime"].dt.second\n\ndf_train.shape\n\n# datetime    ,,,,,  .\n#  column 18    .'}, {'role': 'assistant', 'content': "['data_preprocessing']"}]