#16644: LinearCode.cardinality category breakage
-------------------------------------+-------------------------------------
Reporter: ppurka | Owner:
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-6.3
Component: coding theory | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
public/categories/new_parent_linear_codes-16644|
b48b62702d0d4ff382111ad093ac80808aef6231
Dependencies: | Stopgaps:
-------------------------------------+-------------------------------------
Comment (by ppurka):
@tscrim: there is still this problem with `element_class`. I have been
able to get some other stuff working with your patch.
{{{
sage: C = codes.HammingCode(3, GF(2))
sage: C.cardinality()
16
sage: C.an_element()
(1, 0, 0, 0, 0, 1, 1)
sage: C2 = C.cartesian_product(C)
sage: C2.an_element()
((1, 0, 0, 0, 0, 1, 1), (1, 0, 0, 0, 0, 1, 1))
sage: C.categories()
[Category of vector spaces over Finite Field of size 2,
Category of modules over Finite Field of size 2,
Category of bimodules over Finite Field of size 2 on the left and Finite
Field of size 2 on the right,
Category of right modules over Finite Field of size 2,
Category of left modules over Finite Field of size 2,
Category of commutative additive groups,
Category of additive groups,
Category of additive inverse additive unital additive magmas,
Category of commutative additive monoids,
Category of additive monoids,
Category of additive unital additive magmas,
Category of commutative additive semigroups,
Category of additive commutative additive magmas,
Category of additive semigroups,
Category of additive magmas,
Category of sets,
Category of sets with partial maps,
Category of objects]
sage: C.element_class()
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
<ipython-input-5-66b2e3babdf7> in <module>()
----> 1 C.element_class()
/home/punarbasu/Installations/sage-git/local/lib/python2.7/site-
packages/sage/structure/parent.so in
sage.structure.parent.Parent.__getattr__
(build/cythonized/sage/structure/parent.c:7290)()
/home/punarbasu/Installations/sage-git/local/lib/python2.7/site-
packages/sage/structure/misc.so in
sage.structure.misc.getattr_from_other_class
(build/cythonized/sage/structure/misc.c:1687)()
AttributeError: 'LinearCode_with_category' object has no attribute
'element_class'
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/16644#comment:17>
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