Dependency on h5py causing incompatibility with Python 3.11

[pllim]

glue/setup.cfg

Line 44 in b8f51d8

h5py>=2.10

will cause downstream packages to not able to install in Python 3.11 even though they do not use h5py until this issue is fixed:

• Python 3.11 wheels h5py/h5py#2146

Related problem:

• TST: Test against Python 3.11 spacetelescope/jdaviz#1654

[astrofrog]

@dhomeier maybe we can just mark the dependency as being conditional on python<3.11?

[dhomeier]

Is this still not fixed? Installing h5py=3.7.0 worked just fine e.g. in https://github.com/glue-viz/glue/actions/runs/3267646674/jobs/5373107881 .

[pllim]

3.7 was released back in May. It didn't work when I tried a few weeks ago but I am trying again now with the released version.

[pllim]

Though the point is... why do I even have to bother? Jdaviz does not use HDF5.

[dhomeier]

OK I'll see if it's just to keep those tests from complaining (but it really should be in all and tests extras then), or if there are some deeper-lying problems as with the glue-astronomy translators. Most tests do check for install status of h5py, but I see some failures related to data_factories – no obvious connection to HDF5 files, though.

[astrofrog]

Though the point is... why do I even have to bother? Jdaviz does not use HDF5.

But glue does - and jdaviz made the choice to depend on glue. We can't remove dependencies that give glue users a good user experience just because they aren't used by jdaviz. Maybe one day if pip supports the ability to do [minimal] (see astropy/astropy#12448 (comment)) then that will help?

[pllim]

"minimal" would be nice, but right now, it doesn't make sense for Jdaviz to build h5py from source in its CI and I am not sure when h5py would release wheel for Python 3.11. Is HDF5 a compulsory file format for Glue? That is unfortunate.

[astrofrog]

We do want to install h5py by default for glue users but of course since there are no wheels right now we should not require it on Python 3.11 yet if it doesn't install easily from source, which is what I mentioned in #2340 (comment) - I just meant that we can't remove h5py as a dependency altogether.

[pllim]

OK, see #2341

[dhomeier]

There are the [recommended] etc. install options, but not having everything with pip install glueviz obviously still has the potential for confusion, as in #2336.

[dhomeier]

h5py wheels are coming along in h5py/h5py#2165

[pllim]

Addressed by #2321