python3.4对已经存在的excel写入数据

 #!/usr/bin/env python
 # -*- coding:utf-8 -*-
 # __author__ = "blzhu"
 """
 python study
 Date：2017
 """
 from xlrd import open_workbook
 import os
 from os.path import join
 from xlutils.copy import copy

 source = r"E:\python\pycharmwork\excel"
 for root, dirs, files in os.walk(source):
     for OneFileName in files:
         if OneFileName.find('.xls') == -1:
             continue
         print('文档名称：')
         print(OneFileName)
         OneFullFileName = join(root, OneFileName)
         print(OneFullFileName)
         rb = open_workbook(OneFileName, formatting_info=True)
         w = copy(rb)
         # 修改第0行第2列为123
         w.get_sheet(0).write(0, 2, 123)
         w.save(OneFileName)
         print('finished')