PyTorch >=2.5.0 - TypeError: Type parameter +RV without a default follows type parameter with a default

[tanwarsh]

Describe the bug
Version:
PyTorch >=2.5.0
PIP > 24.1.2
Torchvision >=0.20.1

The error shown in screenshot below occurs when using a dataset with PyTorch and Torchvision.

To Reproduce
Steps to reproduce the behavior:

1. Follow https://openfl.readthedocs.io/en/latest/tutorials/taskrunner.html# and run torch/mnist workspace with version mentioned above.

Expected behavior
The experiment should run without any issues.

Screenshots

Solution

1. Use PIP version <=24.1.2 for dependency management.
2. Apply the following patch before importing datasets from torchvision.

import sys
import typing_extensions
sys.modules["pip._vendor.typing_extensions"] = typing_extensions
from torchvision import datasets

[teoparvanov]

Thanks for publishing the workaround, @tanwarsh !