python|pandas 不覆盖的写入 excel 同一张表

import pandas as pd
from openpyxl import load_workbook    #pip install openpyxl 

data = [] #待写入的数据

df = pd.DataFrame(data,columns=['列名1', '列名2', '列名3'])
book = load_workbook('本地excel文件.xlsx')
with pd.ExcelWriter('本地excel文件.xlsx') as E:
    E.book = book
    E.sheets = dict((ws.title, ws) for ws in book.worksheets) #获取文件中已存在的表名，这行直接用，不用修改
    df.to_excel(E, sheet_name='表名',index=False)