[{'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 plot_bar(data, col ,  feature=[]):\n    length = len(feature)*4\n    plt.figure(figsize=(20,length))\n    for i,j in zip(feature,range(1,len(feature)*2-1,2)):\n        plt.subplot(10,2,j)\n        #fig = plt.figure(figsize=(9,8))\n        sns.barplot(x=i, y=col, data=data, palette='Set2',orient='v')\n        plt.plot()\n        plt.subplot(10,2,j+1)\n        sns.boxplot(x=i, y=col, data=data, palette='Set2'  , width=.4)\n        plt.plot()"}, {'role': 'assistant', 'content': 'result_visualization'}]