[{'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:datedf = wholedf[['dateonly', 'Date']].groupby(['dateonly'], as_index=False).count().sort_values(by='dateonly',ascending=0)\ndatedf = datedf.set_index(datedf.dateonly)\ndel datedf['dateonly']\ndatedf.columns = ['Count']\ndatedf.plot()\nplt.title('Count of Violation Over Time')\nplt.xlabel('Date')\nplt.show()"}, {'role': 'assistant', 'content': 'data_exploration'}]