Hey Rob,
Here's a patch where I made CartanMatrix inherit from regular matrices:
http://trac.sagemath.org/sage_trac/ticket/14137. Although it is slightly
bad as there is not a proper parent, but here's the short version:
__metaclass__ = ClasscallMetaclass
@staticmethod
def __classcall_private__(cls, *args, **kwds):
"""
Normalize input so we can inherit from spare integer matrix.
.. NOTE::
To disable the Cartan type check, use the optional argument
``cartan_type_check = False``.
EXAMPLES::
sage: C = CartanMatrix(['A',1,1])
sage: C2 = CartanMatrix([[2, -2], [-2, 2]])
sage: C3 = CartanMatrix(matrix([[2, -2], [-2, 2]]), [0, 1])
sage: C == C2 and C == C3
True
"""
# Some processing to get the variables I need
mat = typecall(cls, MatrixSpace(ZZ, n, sparse=True), data,cartan_type
, index_set)
mat._subdivisions = subdivisions
return mat
def __init__(self, parent, data, cartan_type, index_set):
"""
Initialize ``self``.
TESTS::
sage: C = CartanMatrix(['A',1,1])
We skip the category test since it doesn't have its own parent, in
this context
because we have a fixed ring, the change ring test doesn't make
sense.
sage: TestSuite(C).run(skip=["_test_category", "
_test_change_ring"])
"""
Matrix_integer_sparse.__init__(self, parent, data, False, False)
self._cartan_type = cartan_type
self._index_set = index_set
self.set_immutable()
I forget if the the change ring test worked...
Hope that helps.
Best,
Travis
On Tuesday, June 4, 2013 5:10:35 PM UTC-7, Rob wrote:
>
> I am trying to make a class PoolingMatrix, which needs to be an
> (binary) integer matrix with extra attributes and functions. For
> example, I'd like to say:
>
> sage: m = PoolingMatrix(ZZ, [[1,0,0],[0,1,0],[0,0,1]])
> sage: m.nrows()
> 2
> sage: m.is_disjunct(2) # the 3x3 identity matrix is 2-disjunct
> True
>
> But the init specification for PoolingMatrix is tripping me up. Can
> anyone provide a suggestion?
>
> I'm trying something like:
> class PoolingMatrix(some_matrix_thingy):
> def __init__(self, input_ring, input_array):
> ...
>
> Thanks for any assistance
> -Rob
>
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