#9944: categories for polynomial rings
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Reporter: robertwb | Owner: nthiery
Type: defect | Status: needs_info
Priority: major | Milestone: sage-4.7
Component: categories | Keywords:
Author: Robert Bradshaw | Upstream: N/A
Reviewer: Nicolas M. Thiéry, Mike Hansen | Merged:
Work_issues: |
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Comment(by SimonKing):
Replying to [comment:17 SimonKing]:
> A similar issue has been studied at #10467. It seems to be important
that an attribute error is raised as quickly as possible. That becomes
difficult, if 60 parent classes need to be searched, before one eventually
finds that the requested attribute does not exist.
No, that is not the problem here! I was inserting print statements into
`getattr_from_other_class` in order to find out what attributes are
actually requested from the category when doing arithmetic. It turned out
that, during the first computation of `(2*x-1)^2+5`, some attributes are
requested. But when one repeats that computation,
`getattr_from_other_class` is ''not'' involved.
But what else could be the reason?
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9944#comment:18>
Sage <http://www.sagemath.org>
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