Start supporting Python 3.11

[bartbroere]

The issue of PyTorch not supporting Python 3.11 (pytorch/pytorch#86566) seems to have been resolved. I did not see any apparent other issues with supporting Python 3.11 in the code.

[davidkyle]

Thanks for the change @bartbroere. Looks good but I'd like to test this on a couple of platforms first

[davidkyle]

Testing this I found it is not possible to install torch 1.13.1 with Python3.11.

Using pip install with Python 3.10 the install is successful:

/Library/Frameworks/Python.framework/Versions/3.10/bin/python3.10 -m pip install torch==1.13.1

With Python 3.11 the same install fails

/Library/Frameworks/Python.framework/Versions/3.11/bin/python3.11 -m pip install torch==1.13.1

ERROR: Could not find a version that satisfies the requirement torch==1.13.1 (from versions: 2.0.0, 2.0.1)
ERROR: No matching distribution found for torch==1.13.1

It looks like PyTorch 1.13.1 does not support Python 3.11, we will have to upgrade to PyTorch 2.0 for that support

@bartbroere did you get a different result?

[pquentin]

PyTorch 1.13.1 only supports Python 3.11 on Linux, not on Windows or macOS, per the "cp311" files in https://pypi.org/project/torch/1.13.1/#files. It seems OK to support Python 3.11 on Linux but not on other platforms, but I'm biased as a Linux user :)

[davidkyle]

Thanks @pquentin, allowing the option of using Python 3.11 generally will break model upload for too many users.

@bartbroere unless you have an objection I'd like to close this PR without merging as neither macOS or Windows users can use Python 3.11 with PyTorch 1.13.1

[bartbroere]

Good discussion, and apologies I may not have had the right environment during testing this locally! I closed this pull request, since I agree it's wise not to merge this one until a newer Pytorch is supported.