python 3 往Excel 中的写入内容但不覆盖原内容

EXCEL  写入数据保持原样式

import xlwt
import xlrd
import xlutils
import xlutils.copy
class ExcelHandle():
    def __init__(self, filename):
        self.filename = filename
        self.test_data = xlrd.open_workbook(self.filename,formatting_info=True)  # 保留原格式
        self.sheet = self.test_data.sheet_by_index(0)
    def writeExcel(self,row,col,value):
        self.row = row
        self.col = col
        self.args = value
        style = xlwt.XFStyle()
        oldsheet = xlrd.open_workbook(self.filename,formatting_info=True)
        newsheet = xlutils.copy.copy(oldsheet)
        newwrite = newsheet.get_sheet(0)
        newwrite.write(self.row, self.col, str(value), style)
        newsheet.save(self.filename)
    def readExcel(self, row,col):
        comlist = str(self.sheet.cell_value(row, col))
        return comlist

if __name__ == '__main__':
    t = ExcelHandle('bookname.xlsx')

    for i in range(2,15):
        for j in range(1, 10):
            X = t.readExcel(i,1)
            print(X)
            print("______________")
            t.writeExcel(i,j,"sssss")

#coding=utf-8

import xlwt
import xlrd
import xlutils.copy

#################################################################################
# Create a new sheet1
#workbook = xlwt.Workbook()
#sheet1 = workbook.add_sheet('sheet1',cell_overwrite_ok=True)

# Write something into the sheet1
#sheet1.write(0,0,'connected IP')
#sheet1.write(0,1,'Addr IPV4 IP(s)')

# save excel file
#workbook.save('C:\\Users\\32065\\Desktop\\Net\\simulation\\excel\\test.xls')
#print 'create excel file successfully!'

################################################################################
rb = xlrd.open_workbook('C:\\Users\\32065\\Desktop\\Net\\simulation\\excel\\test.xls')
wb = xlutils.copy.copy(rb)
#获取sheet对象，通过sheet_by_index()获取的sheet对象没有write()方法
ws = wb.get_sheet(0)
#写入数据
ws.write(0, 1, 'changed!')
ws.write(1, 0, '10-changed!')
ws.write(2, 0, '20-changed!')
#添加sheet页
# wb.add_sheet('sheetnnn2',cell_overwrite_ok=True)
#利用保存时同名覆盖达到修改excel文件的目的,注意未被修改的内容保持不变
wb.save('C:\\Users\\32065\\Desktop\\Net\\simulation\\excel\\test.xls')

##############################################################################

# read the excel file
data = xlrd.open_workbook('C:\\Users\\32065\\Desktop\\Net\\simulation\\excel\\test.xls')
table = data.sheets()[0] # open the first sheet
nrows = table.nrows # not-null rows
print nrows
for i in range(nrows): # print by rows
    if i == 0: # 跳过第一行
        continue
    print table.row_values(i)[0:2]