[{'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:# define the base models\nbase_models = list()\nbase_models.append(('ridge', ridge_model))\nbase_models.append(('lasso', lasso_model))\nbase_models.append(('rf', rf_model_en))\n# define meta learner model\nlearner = LinearRegression()\n# define the stacking ensemble\nstack1 = StackingRegressor(estimators=base_models, final_estimator=learner, cv=10)\n# fit the model on all available data\nstack1.fit(X, y)"}, {'role': 'assistant', 'content': "['modelling']"}]