arf.open_file(fn, mode="a") fails with h5py 3.3

[bnavigator]

The internals of h5py have changed, and arf's usage of private _hl fails now:

...
[   16s] python39-h5py-3.3.0-1.1               ########################################
...
[   19s] + PYTHONPATH=/home/abuild/rpmbuild/BUILDROOT/python-arf-2.6.1-1.4.x86_64/usr/lib/python3.9/site-packages
[   19s] + PYTHONDONTWRITEBYTECODE=1
[   19s] + pytest-3.9 --ignore=_build. --ignore=_build.python39 --ignore=_build.python38 -v
...
[   20s] =================================== FAILURES ===================================
[   20s] ____________________ TestArfNavigation.test01_creation_iter ____________________
[   20s] 
[   20s] self = <tests.test_arf.TestArfNavigation testMethod=test01_creation_iter>
[   20s] 
[   20s]     def test01_creation_iter(self):
[   20s] >       self.fp = arf.open_file("test06", mode="a", driver="core", backing_store=False)
[   20s] 
[   20s] tests/test_arf.py:162: 
[   20s] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
[   20s] arf.py:78: in open_file
[   20s]     fp = files.File(files.make_fid(name, mode, userblock_size, fapl, fcpl))
[   20s] /usr/lib64/python3.9/site-packages/h5py/_hl/files.py:211: in make_fid
[   20s]     fid = h5f.open(name, h5f.ACC_RDWR, fapl=fapl)
[   20s] h5py/_objects.pyx:54: in h5py._objects.with_phil.wrapper
[   20s]     ???
[   20s] h5py/_objects.pyx:55: in h5py._objects.with_phil.wrapper
[   20s]     ???
[   20s] _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
[   20s] 
[   20s] >   ???
[   20s] E   OSError: Unable to open file (unable to open file)
[   20s] 
[   20s] h5py/h5f.pyx:100: OSError

[dmeliza]

Thanks for catching this. For now, I'm just going to pin the h5py dependency, but I'll leave the issue open in case you or someone else wants to submit a pull request.

[bnavigator]

This was fixed in h5py 3.4