#16831: TensorProductsCategory fails to work in 6.3
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Reporter: cnassau | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.4
Component: categories | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
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The following code used to work in Sage 6.0 (up to Sage 6.2 possibly, but
can't test it right now):
{{{
from sage.categories.category_types import Category_over_base_ring
from sage.categories.tensor import TensorProductsCategory, tensor
class TestCat(Category_over_base_ring):
@cached_method
def super_categories(self):
return []
class ParentMethods:
def mytestmthd(self):
return "ok"
class TensorProducts(TensorProductsCategory):
@cached_method
def extra_super_categories(self):
return [self.base_category()]
class ParentMethods:
def tenstestmthd(self):
return "ok"
O=CombinatorialFreeModule(RDF,ZZ,category=(ModulesWithBasis(RDF),TestCat(RDF)))
print "O.cats=", O.categories()
OO=tensor((O,O))
print "OO.cats=", OO.categories()
C=O.category()
print C
#print TensorProductsCategory(C)
J=OO.category()
print "OO.category=",J
print O.mytestmthd()
print OO.mytestmthd()
print OO.tenstestmthd()
}}}
Here "works" means that the last three print statements produce an "ok".
It no longer works in Sage 6.3:
* the `print TensorProductsCategory(C)` raises an error in `_repr_`
* the tensor product `OO` is no longer in the `TestCat.TensorProducts`
category
The `_repr_` error seems to relate to the new Axiom-framework.
--
Ticket URL: <http://trac.sagemath.org/ticket/16831>
Sage <http://www.sagemath.org>
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