module 'torch' has no attribute '_six'

This error typically occurs when there is a version mismatch between the PyTorch package and the rest of the packages in your environment.

To resolve this issue, you can try the following steps:

1. Upgrade PyTorch to the latest version by running `pip install torch --upgrade`.
2. Check if there are any conflicting packages in your environment by running `pip freeze`. If you find any packages that are not compatible with PyTorch, you can try to uninstall them or create a new environment with a fresh installation of PyTorch.
3. Restart your Python kernel or the entire environment to make sure that the changes are applied.

If the issue persists, you can try to reinstall PyTorch from scratch or seek help from the PyTorch community forums.