#16219: Implement a catalog for algebras
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Reporter: tscrim | Owner: tscrim
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: interfaces | Resolution:
Keywords: algebras catalog | Merged in:
Authors: Travis Scrimshaw | Reviewers: Nicolas M. Thiéry
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/algebras/catalog-16219 | 61d6bd1dd3be8ef99ac8c835fd94890e68bef235
Dependencies: | Stopgaps:
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Comment (by nthiery):
Replying to [comment:9 tscrim]:
> > Why not lazy importing everything?
>
> I lazy imported things that were lazily imported into the global
namespace, so it wouldn't trigger an import when doing tab completion on
`algebras.` (as what happens for groups).
> Was this suppose to be set as needs_info? I don't quite understand why
this was set to needs_work.
I was thinking of lazy importing everything here right away. Maybe
using a flag "at_startup" to make the point that those should really
be lazy imported elsewhere as well. What do you think?
> There's a more trickier question of what algebras could we remove from
the global namespace (it's not nearly as clear as it was for crystals to
me), but I think that can be done on a followup.
+1
> Yep, and it should probably be a subcatalog called `combinatorial_hopf`
(or maybe just `.hopf` and include all Hopf algebras). Anyways, stuff for
later and I'll take a look at #16256 soon.
And at some point we will want to automatize the building of all those
catalogs. E.g. following the prototype Florent wrote during the Sage
days in Edinburgh that instruments `TestSuite` to build a database of
all parents with their category, from which we can get all parents in
a category by reverse lookup. I just created #17219 for this.
Cheers,
Nicolas
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Ticket URL: <http://trac.sagemath.org/ticket/16219#comment:10>
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