I am also encountering this after upgrading to PyTorch 2.x. Based on checking a few venvs, it looks like torchvision.transforms.functional_tensor was available up through 0.14.1 but is not present in 0.15.0 or better.

Works for me but i get:

The torchvision.transforms.functional_tensor module is deprecated in 0.15 and will be removed in 0.17. Please don't rely on it. You probably just need to use APIs in torchvision.transforms.functional or in torchvision.transforms.v2.functional.

I'm also having this warning. As I searched in the repo, torchvision.transforms.functional_tensor is only called in "basicsr/data/degradations.py". Replacing the import line torchvision.transforms.functional_tensor in this file, with torchvision.transforms.functional should solve the warning problem.

Environment:
macOS 13.4 (Apple M1 Max)
Python 3.10.11
torch 2.0.1
torchvision 0.15.2

Looks like this package is not updated anymore, to patch the issue in your python program you may add those lines

from torchvision.transforms import functional
import sys

sys.modules["torchvision.transforms.functional_tensor"] = functional

which will redirect torchvision.transforms.functional_tensor to torchvision.transforms.functional so the broken import will now work again w/ latest torchvision.

Yea, using torchvision.transforms.functional instread of torchvision.transforms.functional_tensor is recommended for the latest torchvision