Restricting Python < 3.11 version and adding tensorflow, keras, scikeras, braindecode, skorch and torch [optional]

[bruAristimunha]

Hi guys, @carraraig and @sylvchev!

I am updating the python version 3.8 >= to be unsure that we can add the new dependencies (TensorFlow, Keras, Scikeras, braindecode and Pytorch). In this pull, I added Tensorflow, Keras and Scikeras. In PR #328, I added the braindecode and torch.

I'm still learning to work with Poetry, but I think everything is correct. @sylvchev, can you take a look and apply the merge if that's good for you?

[bruAristimunha]

Hi @sylvchev,

Can I merge?

[sylvchev]

Thanks @bruAristimunha
The python 2.8 is already ensured in the pyproject.toml, is there a specific need for limiting version up to 2.11?
Regarding requirements of keras, tensorflow and scikeras, I'll prefer to add them as optional requirements. It is possible to do this in poetry (it is called dependency groups), like in pip, to specify requirements that are not installed by default but could be activated.
As these requirements add heavy implications on the system (GPU drivers, ...), it seems better to keep them separated to keep installation simple on most system.

[bruAristimunha]

Hi @sylvchev,

About the limitation of python, scikeras requires this restriction. I think it's silly, but without that, poetry won't let you add the library, even optionally.

I defined the deep learning libraries as optional.

[bruAristimunha]

I updated the command for the CI to install all dependencies

[bruAristimunha]

When I regenerated the poetry.lock, we lost something you made to solve a problem with docs. Do you know how to fix this, @sylvchev?

AttributeError: 'BuildEnvironment' object has no attribute '_write_doc_doctree_cache'

[bruAristimunha]

now, with this PR, we can follow and close the PRs #328 and #326.

[sylvchev]

As discussed in MOABB office hours, this is very nice.

[sylvchev]

thanks @bruAristimunha