How to fix - cannot encode object: 28.0, of type: ?

Question

I am attempting to serialize EXIF metadata from a JPEG file using pillow in python3. The metadata are being extracted using my_jpeg_image._getexif() (perhaps there is a better way).

When I try to serialize* those data, I receive the error

cannot encode object: 28.0, of type:

Why is a TiffImagePlugin class being used by pillow for JPEG metadata extraction?

How can I convert a IFDRational to a serializable type e.g. float/int in this case (and/or in general)?

Thanks!

[*FWIW, into mongodb]

user_16335843 · Answer

To convert an IFDRational object obj to type float, you can do

number = obj._numerator / obj._denominator

print(type(number))

Now it becomes

However, if the denominator is 0 , you may need to handle it exceptionally.

IFDRational details are below:

https://pillow.readthedocs.io/en/stable/_modules/PIL/TiffImagePlugin.html

How to fix - cannot encode object: 28.0, of type: <class 'PIL.TiffImagePlugin.IFDRational'>?

1 Answers