[behave]: add some common decorators

[hoel-bagard]

This PR adds some of the most common decorators from the behave package.

I've tried to keep it small, which is why the Context class uses a lot of Any. This could be completed in subsequent PRs.

[srittau]

I've tried to keep it small, which is why the Context class uses a lot of Any. This could be completed in subsequent PRs.

Quick initial note: Please use Incomplete (from _typeshed) for this purpose. It's an easily greppable alias for Any,

[hoel-bagard]

@srittau Thank you for the review.

If I replace all the Any by Incomplete, then the flake8 pre-commit fails with:

Y065 Leave parameter "value" unannotated rather than using "Incomplete"
Y065 Leave return type unannotated rather than using "Incomplete"

I can fix those errors by removing some of the Incomplete, but then the pyright CI fails. What's the correct way to address this ?

[brianschubert]

You'll need to add behave to the exclude list in pyrightconfig.stricter.json here:

typeshed/pyrightconfig.stricter.json

Line 8 in 4449b2b

"exclude": [

[srittau]

Thanks! A few comments below.

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉