[{'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:ids = test['id']\ntest = test.drop(['id'],axis = 1)\n\ny = train['Demanda_uni_equil']\nX = train[test.columns.values]\n\nX_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.2, random_state=1729)\ndel(train)\nprint ('Division_Set_Shapes:', X.shape, y.shape)\nprint ('Validation_Set_Shapes:', X_train.shape, X_test.shape)\ndel(X)\ndel(y)"}, {'role': 'assistant', 'content': "['data_preprocessing']"}]