Wrapping hides the `__version__` attribute

[ev-br]

Case in point: in scipy/scipy#24670,

FAILED scipy/ndimage/tests/test_filters.py::TestNdimageFilters::test_correlate_mode_sequence[cupy] - Failed: DID NOT RAISE <class 'RuntimeError'>

is due to a CuPy enhancement, cupy/cupy#8339, which only landed in CuPy 14. Now, SciPy might want to xfail a test depending on the cupy version.

cross-ref #366

[rgommers]

How about implementing version info as a _version (or similar) function in each namespace that uses importlib.metadata.version to return the version string?

Alternatively, consider this a non-issue and tell downstream users to just handle this themselves. __version__ isn't a standard thing after all, importlib.metadata.version is the recommended way to obtain a package version. Like so:

try:
    cupy_version = importlib.metadata.version('cupy')
except PackageNotFoundError:
    cupy_version = None