[{'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 step in range(max_steps):\nbatch_x, batch_y = mnist.train.next_batch(batch_size)\nsess.run([loss, opt], feed_dict={x:batch_x, y:batch_y})\nif (step+1) % 100 ==0:\n_loss = sess.run([loss], feed_dict={x:batch_x, y:batch_y})\nprint("step:", step+1, "cost:", _loss)'}, {'role': 'assistant', 'content': 'modelling'}]