[{'role': 'system', 'content': "You are an expert in machine learning and your task is to classify the code snippets into categories from the provided list of categories. List of categories: ['helper_functions', 'load_data', 'data_exploration', 'data_preprocessing', 'evaluation', 'modelling', 'prediction', 'result_visualization', 'save_results', 'comment_only']"}, {'role': 'user', 'content': "Identify to which category the provided code belongs and assign the code snippet to at least 1 but up to 5 categories based on the probabilities, ignore if the probability of the category is negligible. Strictly provide your response as a list. Avoid providing any additional information, commentary, or personal opinions.\\nPython Code:# Forbered aflevering \ndftest.drop(['Dayofyear',\n       'Expo','FatalityPct2', 'Factor',\n       'ConfirmedCases_base', 'ConfirmedCases_init',\n       'NewCases_base', 'Fatalities_init', 'FatalityBasis',\n       'ConfirmedCases_shift',\n       'NewCases', 'NewCases_cum', 'NewFatalities','NewFatalities_cum'],axis=1,inplace=True)\nfinal = dftest.groupby(['Country_Region','Province_State']).tail(1)\ndftest.drop(['Province_State'],axis=1,inplace=True)\ndftest.rename(columns={'Province_State_orig':'Province_State'},inplace=True)"}, {'role': 'assistant', 'content': "['data_preprocessing']"}]