[{'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:def print_epoch_stats(epoch_i, sess, last_features, last_labels):\n"""\nPrint cost and validation accuracy of an epoch\n"""\ncurrent_cost = sess.run(\ncost,\nfeed_dict={features: last_features, labels: last_labels})\nvalid_accuracy = sess.run(\naccuracy,\nfeed_dict={features: valid_features, labels: valid_labels})\nprint(\'Epoch: {:<4} - Cost: {:<8.3} Valid Accuracy: {:<5.3}\'.format(\nepoch_i,\ncurrent_cost,\nvalid_accuracy))'}, {'role': 'assistant', 'content': 'modelling'}]