dill.source.getsource returns decorated function instead of function

[Kevin Scott]

I see a few possibly related issues (#221, #603) but I think this is unique.

I'm running the following in pytest:

    def test_fn():
        def decorate(func):
            @functools.wraps(func)
            def wrapper(*args, **kwargs):
                result = func(*args, **kwargs)
                return f"decorated: {result}"

            return wrapper

        @decorate
        def foo(arg1: str = "arg1"):
            return f"foo: {arg1}"

        print(dedent(inspect.getsource(foo)))
        print(dedent(dill.source.getsource(foo)))

The printed statements read:

@decorate
def foo(arg1: str = "arg1"):
    return f"foo: {arg1}"

@functools.wraps(func)
def wrapper(*args, **kwargs):
    result = func(*args, **kwargs)
    return f"decorated: {result}"

The inspect.getsource statement returns the function foo with the decorator decorating, but the dill.source.getsource returns the wrapper function from the decorator.

I would expect dill.source.getsource to return what inspect.getsource.

If I'm wildly misunderstanding the purpose of dill.source.getsource, feel free to close!