pandas 新增sheet，不覆盖原来已经保存的sheet（亲测管用）

#以前的sheet数据很重要，又要新增sheet，很难受，看了一堆帖子没一个回答在点子上，找到了方法，分享给大家

import openpyxl

import pandas as pd

weatherfile = "0317.xlsx"  #路径

writer = pd.ExcelWriter(weatherfile,engine='openpyxl')

pd_data=pd.DataFrame(新数据)   # 

writer = pd.ExcelWriter(weatherfile,engine='openpyxl')
book = openpyxl.load_workbook(writer.path)
writer.book = book
pd_data.to_excel(writer, "新sheet名",index=False)
writer.save()

# 没覆盖，新增成功