Bug: TypeError exif_transpose() / exif.tobytes() #6882
Description
Doing PIL.ImageOps.exif_transpose(im) for a .jpg I get this error:
File "C:\Python38\lib\site-packages\PIL\ImageOps.py", line 602, in exif_transpose
transposed_image.info["exif"] = transposed_exif.tobytes()
File "C:\Python38\lib\site-packages\PIL\Image.py", line 3628, in tobytes
return b"Exif\x00\x00" + head + ifd.tobytes(offset)
File "C:\Python38\lib\site-packages\PIL\TiffImagePlugin.py", line 878, in tobytes
data = ifd.tobytes(offset)
File "C:\Python38\lib\site-packages\PIL\TiffImagePlugin.py", line 887, in tobytes
"<table: %d bytes>" % len(data) if len(data) >= 16 else str(values)
TypeError: object of type 'IFDRational' has no len()
At post-mortem:
>>> PIL.__version__
'9.3.0'
>>> data
2.2
>>> type(data)
<class 'PIL.TiffImagePlugin.IFDRational'>
>>> len(data)
Traceback (most recent call last):
File "<interactive input>", line 1, in <module>
TypeError: object of type 'IFDRational' has no len()
# stack frame `data = ifd.tobytes(offset)`
>>> tag, value
(34853, {5: 2.2, 6: 0.0}) # GPSInfo
>>> type(value[5])
<class 'PIL.TiffImagePlugin.IFDRational'>
# stack frame with image:
>>> im.getexif()[274] # Orientation
6(Can't publish the image / exif unfortunately, but it should be clear whats going on: IFDRational in GPS exif tag fails to serialize to bytes)