[{'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:vif = pd.DataFrame()\nvif['Features'] = vif_data.columns\nvif['vif'] = [variance_inflation_factor(\n             vif_data.values, i) for i in range(vif_data.shape[1])]\nvif.sort_values(by='vif',ascending=False)"}, {'role': 'assistant', 'content': 'data_preprocessing'}]