python 写EXCEL

from openpyxl import load_workbook
import  pandas as pd
class Write_to_excel():
    def __init__(self,src,sheet,df):
        if src is None or sheet is None or df is None:
            raise Exception('报错内容：Write_to_excel--','传参错误')
        self.src=src
        self.sheet=sheet
        self.df = df
    def to_wte(self):
        book=load_workbook(self.src)
        write=pd.ExcelWriter(self.src,engine='openpyxl')
        write.book=book
        write.sheets=dict((ws.title,ws)for ws  in book.worksheets)
        self.df.to_excel(write,sheet_name=self.sheet,index=0,startrow=0,startcol=0,header=True)
        write.save()
        write.close()