insert_bitmap()仅适用于bmp格式，xlsxwriter不仅支持bmp，而且还支持jpeg和png文件，通过worksheet.insert_image

Traceback (most recent call last):

  File "E:/Embedded programming/Python/excel/writeExcel.py", line 19, in <module>

    wsimage.insert_bitmap("无标题.jpg",0,0)

  File "D:\Program Files\Python387\lib\site-packages\xlwt\Worksheet.py", line 1122, in insert_bitmap

    bmp = Bitmap.ImDataBmpRecord(filename)

  File "D:\Program Files\Python387\lib\site-packages\xlwt\Bitmap.py", line 273, in __init__

    self.width, self.height, self.size, data = _process_bitmap(filename)

  File "D:\Program Files\Python387\lib\site-packages\xlwt\Bitmap.py", line 198, in _process_bitmap

    return _process_bitmap_data(data)

  File "D:\Program Files\Python387\lib\site-packages\xlwt\Bitmap.py", line 206, in _process_bitmap_data

    raise Exception("bitmap doesn't appear to to be a valid bitmap image.")

Exception: bitmap doesn't appear to to be a valid bitmap image.

我添加png和JPG格式的，显示这个报错