keyring missing to use astroquery in xeus-python lite kernel

[ManonMarchand]

Hello!

I'd like to use astroquery in a xeus-python-lite kernel. This is currently only blocked by the keyring dependency which is not available to libmamba

error    libmamba Could not solve for environment specs
    The following package could not be installed
    └─ astroquery =* * is not installable because it requires
       └─ keyring [=* *|>=15.0 *|>=4.0 *] but there are no viable options
          ├─ keyring [24.3.1|25.0.0|...|25.7.0] would require
          │  └─ __osx =* *, which is missing on the system;
          ├─ keyring [24.3.1|25.0.0|...|25.7.0] would require
          │  └─ __win =* *, which is missing on the system;
          └─ keyring [24.3.1|25.0.0|...|25.7.0] would require
             └─ __linux =* *, which is missing on the system.
critical libmamba Could not solve for environment specs

Since convincing the developers of keyring to publish their library in a new place might be a long process, I was wondering if you'd be open to have it as an optional dependency here?

[keflavich]

I'm OK with making keyring an optional dependency - but with the qualification that, in the not-too-distant future, there may be many services that cannot be accessed without authentication. If that happens, it may be best to have keyring as a default dependency.

Is there a good mechanism to do that? i.e., make it so a user can pip install astroquery and have keyring installed by default, but an optional pip install astroquery[no-keyring] would exist in parallel? The internet tells me no, this isn't possible...

[ManonMarchand]

Looks like there's a PEP cooking up for this https://peps.python.org/pep-0771/
So it's not possible yet

[bsipocz]

I'm OK with making keyring not a required dependency, the only reason we made it required was that it seemed lightweight and more modules started using it. But if I have to tally it's still a minority of the modules, so we should be all right.

As for convenience for the users, I would just recommend them to always install with astroquery[all] to access all the functionalities.