[{'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 cleanup_message(message):\n    messsage_pun =  [ char for char in message  if char not in string.punctuation]\n    message_punc_join = ''.join(messsage_pun)\n    message_punc_join_clean = [ word for word in message_punc_join.split() if word.lower() not in stopwords.words('english')]\n    return message_punc_join_clean"}, {'role': 'assistant', 'content': 'data_preprocessing'}]