ImportError: cannot import name 'Sequence' from 'collections'

[weissmanuel]

Got the following error when using skorch.helper.predefined_split with Python 3.10

ImportError: cannot import name 'Sequence' from 'collections'

Using Python 3.9 worked as workaround but would nice if skorch would also work for Python 3.10.

[BenjaminBossan]

Hmm, this works for me:

python3.10 -c "from collections.abc import Sequence"

Same for

python3.9 -c "from collections.abc import Sequence"

Any idea what the issue could be?

Officially, we don't have 3.10 support yet because for a long time, there was an issue with underlying libraries, but now everything should work. We'll add 3.10 to our CI soon and then check if this issue or similar issues appear.

[BenjaminBossan]

@weissmanuel any updates?

[dliu-fn]

I'm encountering the exact same issue as @weissmanuel, but I checked:

• Python == 3.10
• skorch == 0.11.0
• pytorch == 1.12.1+cu102
• python3.10 -c "from collections.abc import Sequence" worked for me

And I'm confused, because I see that it's correct in the repo: https://github.com/skorch-dev/skorch/blob/master/skorch/helper.py#L6

and yet, for some reason my virtual environment is using a much older version of skorch, somehow.

[dliu-fn]

Ohhhh this was only merged into a release recently on the 0.12.0
release, so 0.11.0was insufficient.

@weissmanuel We seem to have the same anticipation as the person here: #872

Try using 0.12.0 and the bug should be resolved.

[BenjaminBossan]

Thanks for @dliu-fn for figuring this out, sorry that I forgot about it. I think we can close the issue now :)