[{'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:wholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("drive","dr")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("road","rd")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("rd.","rd")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("avenue","av")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("ave.","av")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("ave","av")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("parkway","pkwy")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("street","st")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("st.","st")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("heights","hgts")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace(" 1","1")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("no ","n ")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace(" & mansion st","")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("st burlington vt 05401","st")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("n willardst","n willard st")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("stpaul st","st paul st")\nwholedf[\'Street1\'] = wholedf[\'Street1\'].str.replace("colchestr av","colchester av")'}, {'role': 'assistant', 'content': 'data_preprocessing'}]