[{'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:val = []\ntest = []\nfor i in range(1000):\nrng = np.random.RandomState(i)\nnoise = rng.normal(scale=.1, size=X_train.shape)\nknn = KNeighborsClassifier(n_neighbors=5).fit(X_train + noise, y_train)\nval.append(knn.score(X_val, y_val))\ntest.append(knn.score(X_test, y_test))\nprint("Validation: {:.3f}".format(np.max(val)))\nprint("Test: {:.3f}".format(test[np.argmax(val)]))'}, {'role': 'assistant', 'content': 'evaluation'}]