an small and perhaps unimportant gotcha

[Lisandro Dalcin]

On Tue, Dec 2, 2008 at 4:46 PM, Barry Smith <bsmith at mcs.anl.gov> wrote:
>
>   Yup, this comes from trying to patch more and more flexibility on a system
> that wasn't originally designed for that particular flexibility. The matrix
> and vector
> are in a strange state at this point that is not defined by our original
> design.

Of course, but this enhacement was one I wanted forever! So very welcome!

>  At this point I think we just have to live with this weirdness, unless
> you have a solution.

At MatGetType we could traverse the MatList to find the type_name, but
that would not work in the case of --with-dynamic=1 (and perhaps other
scenarios)

In short, yes, we have to live with it (at least for 2.4.0).



> On Dec 2, 2008, at 9:12 AM, Lisandro Dalcin wrote:
>
>> Other (really nice!) change I've noticed is that now we can call
>> {Vec|Mat}Create() and next {Vec|Mat}SetType() and it works!
>>
>> However, see this.
>>
>> In [1]: from petsc4py import PETSc
>>
>> In [2]: x = PETSc.Vec().create()
>>
>> In [3]: x.setType('seq')
>>
>> In [4]: print x.getType()
>>
>> None
>>
>> In [5]: A = PETSc.Mat().create()
>>
>> In [6]: A.setType('seqaij')
>>
>> In [7]: print A.getType()
>>
>> None
>>
>>
>> Internally, the "type_name" field is never set, it still is NULL (then
>> petsc4y returns None).
>> The problem is that forcing the "type_name" to be set will be really
>> dangerous (rmember PetscValidType macro).
>> Any comments?
>>
>>
>>
>> --
>> Lisandro Dalcín
>> ---------------
>> Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
>> Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
>> Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
>> PTLC - Güemes 3450, (3000) Santa Fe, Argentina
>> Tel/Fax: +54-(0)342-451.1594
>>
>
>



-- 
Lisandro Dalcín
---------------
Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
Instituto de Desarrollo Tecnológico para la Industria Química (INTEC)
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET)
PTLC - Güemes 3450, (3000) Santa Fe, Argentina
Tel/Fax: +54-(0)342-451.1594