[{'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:estimator = PositiveIntegerGradientBoostingRegressor(n_estimators=1000,\nmax_depth=model.best_params_['max_depth'])\nX_train = data.drop(['count', 'casual', 'registered'], axis=1).values\ny_train = data['count'].values\nestimator.fit(X_train,\ny_train)\ntestData = pandas.read_csv('test.csv')\npredictions = pandas.DataFrame(testData['datetime'])\ntestData = coerceData(testData)\npredictions['count'] = estimator.predict(testData).astype('int')\npredictions.to_csv('submission.csv',\nsep=',',\nindex=False)"}, {'role': 'assistant', 'content': 'modelling'}]