[{'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:newtest.drop(["rtemp3","month"],axis=1,inplace=True)\n\nf=pd.read_csv("../input/test.csv")\nnewtest[\'year\']=newtest.year.replace({2011:0,2012:1})\nnewtest["temp"]=f["temp"]\nvar=["holiday","workingday","weekend","hours"]\nfor v in var:\n    newtest[v]=newtest[v].astype("category")\nnewtestreg=newtest.copy()\nnewtestcas=newtest.copy()\nnewtestreg.drop(["daycas"],axis=1,inplace=True)\nnewreg1=pd.get_dummies(newtestreg["dayreg"])\nnewtestreg=pd.concat([newtestreg,newreg1],axis=1)\nnewreg2=pd.get_dummies(newtestreg["year_bin"])\nnewtestreg=pd.concat([newtestreg,newreg2],axis=1)\nnewreg3=pd.get_dummies(newtestreg["day"])\nnewtestreg=pd.concat([newtestreg,newreg3],axis=1)\nnewtestreg.drop(["dayreg","year_bin","day"],axis=1,inplace=True)\nnewtestcas.drop(["dayreg"],axis=1,inplace=True)\nnewcas1=pd.get_dummies(newtestcas["daycas"])\nnewtestcas=pd.concat([newtestcas,newcas1],axis=1)\nnewcas2=pd.get_dummies(newtestcas["year_bin"])\nnewtestcas=pd.concat([newtestcas,newcas2],axis=1)\nnewcas3=pd.get_dummies(newtestcas["day"])\nnewtestcas=pd.concat([newtestcas,newcas3],axis=1)\nnewtestcas.drop(["daycas","year_bin","day"],axis=1,inplace=True)\nnewtest.head()\n\n\''}, {'role': 'assistant', 'content': 'helper_functions'}]