One `gotcha` when adding new image support libraries and using `Pillow` is that they don't automatically become available for use, you will need to reinstall `Pillow`. But if you have caching enabled it will install the prebuilt version from last time and not search for the system image libraries.
To over come this use:
pip install --no-cache-dir pillow
This will bypass the caching mechanism and perform rebuild all the `Pillow` internals meaning that it will detect the new libraries.Share on Twitter Share on Facebook