#10963: More functorial constructions
-------------------------------------+-------------------------------------
Reporter: nthiery | Owner: stumpc5
Type: enhancement | Status: needs_work
Priority: major | Milestone: sage-6.1
Component: categories | Resolution:
Keywords: days54 | Merged in:
Authors: Nicolas M. Thiéry | Reviewers: Simon King, Frédéric
Report Upstream: N/A | Chapoton
Branch: | Work issues: Detect and fix
public/ticket/10963 | Heisenbugs
Dependencies: #11224, #8327, | Commit:
#10193, #12895, #14516, #14722, | 8eaf51a82c4e2194769db13457979ae601ebbc04
#13589, #14471, #15069, #15094, | Stopgaps:
#11688, #13394, #15150, #15506 |
-------------------------------------+-------------------------------------
Comment (by SimonKing):
Ahahah! There is yet another level of indirection!
Namely, I found that the redundant calls to
`base_category_class_and_axiom` happens because of
`axiom_of_nested_class`. It starts with this:
{{{
#!python
if hasattr(nested_cls, "_base_category_class_and_axiom"):
axiom = nested_cls._base_category_class_and_axiom[1]
}}}
I guess it is wrong to do `hasattr` here, since this triggers the
(re!)computation of the lazy class attribute. What we should do instead is
to look up `nested_cls.__dict__`!!
--
Ticket URL: <http://trac.sagemath.org/ticket/10963#comment:267>
Sage <http://www.sagemath.org>
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