df=pd.DataFrame(pd.read_csv("C:/Users/POP/Desktop/survay of consumers/2018/public2018.csv",header=0,encoding = 'unicode_escape'))
df1=df.iloc[:,['B2','D1E','GE2_d','ppagect4','ppeducat','ppethm','ppgender','ppinccat6','ppreg9','ppwork']]
df1
TypeError: cannot perform reduce with flexible type