Use dict instead of print to test callable without signature

[frenzymadness]

In Python 3.11, inspect.signature(print) no longer raises
ValueError.

Fixes: #3459

[github-actions]

👈 Launch a binder notebook on branch frenzymadness/ipywidgets/fix_test_noinspect

[frenzymadness]

Would it make sense to add Python 3.11 to the CI?

[jasongrout]

Would it make sense to add Python 3.11 to the CI?

Sure. Would you mind adding it to

ipywidgets/.github/workflows/tests.yml

Line 91 in 474bbc9

python-version: ['3.7', '3.8', '3.9', '3.10']

?

From https://til.simonwillison.net/github-actions/python-3-11, it seems that just adding "3.11-dev" may be all that is needed.

[jasongrout]

it seems that just adding "3.11-dev" may be all that is needed.

Yes, "3.11-dev" according to the docs:

Use -dev instead of a patch number (e.g., 3.11-dev) to install the latest patch version release for a given minor version, alpha and beta releases included.

We might need to also update

ipywidgets/.github/workflows/tests.yml

Line 96 in 474bbc9

uses: actions/setup-python@v1

to version 2: actions/setup-python@v2

[frenzymadness]

Should I open a new PR? I can also add it here as both changes are related to Python 3.11.

[jasongrout]

Should I open a new PR? I can also add it here as both changes are related to Python 3.11.

I think adding it here makes a lot of sense. And if you add it here, we'll get to see that your change makes tests pass for Python 3.11 too. Thanks!

[frenzymadness]

All green!

[jasongrout]

Awesome, thank you!

[jasongrout]

@meeseeksdev please backport to 7.x

[lumberbot-app]

Owee, I'm MrMeeseeks, Look at me.

There seem to be a conflict, please backport manually. Here are approximate instructions:

1. Checkout backport branch and update it.

git checkout 7.x
git pull

2. Cherry pick the first parent branch of the this PR on top of the older branch:

git cherry-pick -x -m1 d1491e99f0ed2760f731b0f84dc108721c973fb2

3. You will likely have some merge/cherry-pick conflict here, fix them and commit:

git commit -am 'Backport PR #3478: Use `dict` instead of `print` to test callable without signature'

4. Push to a named branch:

git push YOURFORK 7.x:auto-backport-of-pr-3478-on-7.x

5. Create a PR against branch 7.x, I would have named this PR:

"Backport PR #3478 on branch 7.x (Use dict instead of print to test callable without signature)"

And apply the correct labels and milestones.

Congratulations — you did some good work! Hopefully your backport PR will be tested by the continuous integration and merged soon!

Remember to remove the Still Needs Manual Backport label once the PR gets merged.

If these instructions are inaccurate, feel free to suggest an improvement.

[jasongrout]

Backported in #3480