root fails to build with Python 3.15.0a7.

Many many tests fail with the same traceback:

Traceback (most recent call last):
  File "/builddir/build/BUILD/root-6.38.04-build/root-6.38.04/tutorials/machine_learning/TMVA_RNN_Classification.py", line 21, in <module>
    import ROOT
  File "/builddir/build/BUILD/root-6.38.04-build/root-6.38.04/redhat-linux-build/lib/ROOT/__init__.py", line 99, in <module>
    _root_facade = ROOTFacade(sys.modules[__name__], _is_ipython)
  File "/builddir/build/BUILD/root-6.38.04-build/root-6.38.04/redhat-linux-build/lib/ROOT/_facade.py", line 65, in __init__
    self.__cached__ = module.__cached__
                      ^^^^^^^^^^^^^^^^^
AttributeError: partially initialized module 'ROOT' from '/builddir/build/BUILD/root-6.38.04-build/root-6.38.04/redhat-linux-build/lib/ROOT/__init__.py' has no attribute '__cached__' (most likely due to a circular import)


https://docs.python.org/3.15/whatsnew/3.15.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.15/fedora-rawhide-x86_64/10243577-root/

For all our attempts to build root with Python 3.15, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.15/package/root/

Testing and mass rebuild of packages is happening in copr.
You can follow these instructions to test locally in mock if your package builds with Python 3.15:
https://copr.fedorainfracloud.org/coprs/g/python/python3.15/

Let us know here if you have any questions.

Python 3.15 is planned to be included in Fedora 45.
To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.15.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires),
so if this package is required a lot, it's important for us to get it fixed soon.

We'd appreciate help from the people who know this package best,
but if you don't want to work on this now, let us know so we can try to work around it on our side.