[BREAKING FIX] [torchvision 0.17] Change functional_tensor import

[TornjV]

Fix for #649

[akx]

This would not be a breaking change if you try both imports:

Suggested change

	from torchvision.transforms.functional import rgb_to_grayscale
	try:
	from torchvision.transforms.functional import rgb_to_grayscale
	except ImportError:
	from torchvision.transforms.functional_tensor import rgb_to_grayscale

[psychedelicious]

torchvision 0.17 was just released: https://github.com/pytorch/vision/releases/tag/v0.17.0

[keepdying]

can we merge it? 2 months since 0.17 released.

[psychedelicious]

Over at Invoke, we only use the RealESRGAN functionality provided by basicsr.

I extracted the relevant classes and cleaned them up a bit:

• basicsr
• RealESRGAN
• implementation

Maybe this is useful for others who only use this library for upscaling and would like to keep their other dependencies up to date.

[akx]

Over at Invoke, we only use the RealESRGAN functionality provided by basicsr.

The Spandrel project by the chaiNNer folks (disclaimer: I'm a contributor, and I also wired Spandrel up into a1111 in AUTOMATIC1111/stable-diffusion-webui#14425) implements RealESRGAN and various other upscaling and enhancement models in a clean way.

[psychedelicious]

Thanks for the link @akx ! This looks like a very ergonomic API, great work. Much nicer than what the basicsr repo provides (and my extracted version of it).