Python关于xlwt写入数据的问题

源代码：
import xlwt
xls = xlwt.Workbook()
sheet = xls.add_sheet("123")
sheet.wirte(1,1,'123')
xls.save('data.xlsx')

报错：
Traceback (most recent call last):
File "xu.py", line 7, in
sheet.wirte(1,1,'123')
AttributeError: 'Worksheet' object has no attribute 'wirte'

 import xlrd
import xlwt
from xlutils.copy import copy
import os.path
rb = xlrd.open_workbook('my_workbook.xls',formatting_info=True)
r_sheet = rb.sheet_by_index(0) 
wb = copy(rb) 
sheet = wb.get_sheet(0) 
sheet.write(5,2,"string")
wb.save('my_workbook.xls')

wirte 改成 write。而且写入数据的话，貌似保存的格式只能是xls，不能为xlsx