[{'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:df = pd.read_json(open("../input/test.json", "r"))\nprint(df.shape)\ndf["num_photos"] = df["photos"].apply(len)\ndf["num_features"] = df["features"].apply(len)\ndf["num_description_words"] = df["description"].apply(lambda x: len(x.split(" ")))\ndf["created"] = pd.to_datetime(df["created"])\ndf["created_year"] = df["created"].dt.year\ndf["created_month"] = df["created"].dt.month\ndf["created_day"] = df["created"].dt.day\nX = df[num_feats]\n\ny = clf.predict_proba(X)'}, {'role': 'assistant', 'content': 'data_preprocessing'}]