xlrd and xlwt 读写

import xlrd
import xlwt
data=xlrd.open_workbook('info.xls','r')
table=data.sheets()[0]
list=[]
nrows=table.nrows
for i in range(nrows):
    print(table.cell(i,0).value)
    list.append(table.cell(i,0).value)
    list.append('asd')
file=xlwt.Workbook()
table=file.add_sheet('info',cell_overwrite_ok=True)
for i in range(len(list)):
    table.write(i,0,list[i])
file.save('aa.xls')