python excel跨目录操作时，需要用到转义符

import os
import win32com.client as win32
import easygui as eg
import openpyxl


fn_fuzhaibiao = r'C:\Users\laiwu\PycharmProjects\pythonProject1\1.xlsx'
wb_fuzhaibiao = openpyxl.load_workbook(fn_fuzhaibiao)

fuzhaibiao_allSheets = wb_fuzhaibiao.get_sheet_names()

print(fuzhaibiao_allSheets)