feat:support @coco.function decorator for class's member methods

[Davda-James]

Now function decorator can support the class members methods as well along with standalone.

Closes issue: #1555
Files affected:

op.py
__init__.py

Added tests to test the behaviour for new support.

test_function_decorator_methods.py

example taken from tests added below (one):

def test_valid_decorations_do_not_raise_and_set_op_kind() -> None:
    class C:
        @coco.function()
        def im(self, scope=None):  # type: ignore[no-untyped-def]
            pass

        @classmethod
        @coco.function()
        def cm(cls, scope=None):  # type: ignore[no-untyped-def]
            pass

        @coco.function()
        @classmethod
        def cm2(cls, scope=None):  # type: ignore[no-untyped-def]
            pass

        @staticmethod
        @coco.function()
        def sm(scope=None):  # type: ignore[no-untyped-def]
            pass

        @coco.function()
        @staticmethod
        def sm2(scope=None):  # type: ignore[no-untyped-def]
            pass

    assert C.__dict__["im"].__cocoindex_op_kind__ == "Im"
    assert C.__dict__["cm"].__func__.__cocoindex_op_kind__ == "Cm"
    assert C.__dict__["cm2"].__func__.__cocoindex_op_kind__ == "Cm2"
    assert C.__dict__["sm"].__func__.__cocoindex_op_kind__ == "Sm"
    assert C.__dict__["sm2"].__func__.__cocoindex_op_kind__ == "Sm2"

Tests

• all tests are passing

@georgeh0 pls review it whenever you get a chance. I appreciate any feedback or suggestions to improve this PR.

[georgeh0]

Hi @Davda-James,

Thanks for making the PR!

Note that the issue #1555 is for CocoIndex v1 (under pre-release now). Please make changes from the v1 branch and merge changes into that branch.

Also there's a few updates since I filed the issue, and I made a comment.