注意

win32 excel需要绝对路径，不支持相对路径
转换方法，获取当前路径 os.getcwd()，用os.path.join + 文件名组合成绝对路径

workbook.save(f'RPA Amazon WK{wk_num}  {saturday_meihong}.xls')
        path = os.path.join(os.getcwd(),f'RPA Amazon WK{wk_num}  {saturday_meihong}.xls')
        print(path)
        xls_to_xlsx(path)

def xls_to_xlsx(file):
    import win32com.client as win32

    excel = win32.gencache.EnsureDispatch('Excel.Application')
    wb = excel.Workbooks.Open(file)

    wb.SaveAs(file + "x", FileFormat=51)  # FileFormat = 51 is for .xlsx extension
    wb.Close()  # FileFormat = 56 is for .xls extension
    excel.Application.Quit()

参考
https://blog.csdn.net/yizhuanlu9607/article/details/89227908