How to load an Pillow opened image into image-rs

[baseplate-admin]

Hi thanks for creating pyo3,

So i have an image opened with PIllow and i would like to transfer the image from Python to Rust and then process it in Image-rs library.

Is it possible to do so without saving the file to the disk and then loading it with rust ( I was thinking of loading the memory directly and somehow process it? )?

[davidhewitt]

Just use a BytesIO or similar with Image.save to keep the image in-memory and then pass the bytes to Rust as a #[pyfunction] input to load however you like on the Rust side. This isn't any different to how you might share an in-memory image with other Python libraries.

https://pillow.readthedocs.io/en/stable/reference/Image.html#PIL.Image.Image.save