[{'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:# for LSTM, intput.shape = (n_samples, 1, n_features)\nX_train_cc = X_train_cc.reshape(X_train_cc.shape[0], 1, X_train_cc.shape[1])\nX_val_cc = X_val_cc.reshape(X_val_cc.shape[0], 1, X_val_cc.shape[1])\n\nX_train_ft = X_train_ft.reshape(X_train_ft.shape[0], 1, X_train_ft.shape[1])\nX_val_ft = X_val_ft.reshape(X_val_ft.shape[0], 1, X_val_ft.shape[1])\nprint(X_train_cc.shape, X_val_cc.shape, X_train_ft.shape, X_val_ft.shape)'}, {'role': 'assistant', 'content': 'data_preprocessing'}]