[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify code snippets into one of the following categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']."}, {'role': 'user', 'content': 'Identify the single most appropriate category to which the provided code belongs. Provide your response as a single category label without any additional information, commentary, or personal opinions.\\nPython Code:b"# \'max_features\': 0.3, \'n_estimators\': 100, \'max_depth\': 15, \'min_samples_leaf: 1\'\\netc = ExtraTreesClassifier(bootstrap=True, oob_score=True, n_estimators=100, max_depth=10, max_features=0.3, \\\\\\n                           min_samples_leaf=1)\\n\\netc.fit(X_train, y_train)\\n# yy_pred = etc.predict(X_test)\\netc.score(X_train, y_train)"'}, {'role': 'assistant', 'content': 'modelling'}]