Hello,

In napari we use the following code to check the metadata of the package used as a launcher of the application:

app_module = sys.modules['__main__'].__package__
try:
    metadata = importlib_metadata.metadata(app_module)
except importlib_metadata.PackageNotFoundError:
    ...

as importlib_metadata is replacement for importlib.metadata then there is inconsitece as for python 3.8-3.10 the following code executes correctly:

In [2]: importlib.metadata.metadata(None)
Out[2]: <email.message.Message at 0x7fdb7c5ff5e0>

but

importlib_metadata.metadata(None)

ends with error from #391

I found this issue, but as I understand that solution will impact python 3.11 or python 3.12

python/cpython#93259

it is possible to restore old behaviour for old version of python to not break existing code? I understand that new version of libraries should be fixed, but such updates should not break existing code.