[petsc-users] TaoSetVariableBounds in petsc4py

[Justin Chang]

Matt,

This is the error I get if I use None:

Traceback (most recent call last):
  File "2D_plume_ADR_ex1.py", line 146, in <module>
    tao_D.setVariableBounds(lb_vec,None)
  File "PETSc/TAO.pyx", line 198, in petsc4py.PETSc.TAO.setVariableBounds
(src/petsc4py.PETSc.c:189484)
TypeError: Cannot convert NoneType to petsc4py.PETSc.Vec

Thanks,
Justin

On Thu, Sep 17, 2015 at 2:59 PM, Matthew Knepley <knepley at gmail.com> wrote:

> On Thu, Sep 17, 2015 at 3:55 PM, Justin Chang <jychang48 at gmail.com> wrote:
>
>> Hi all,
>>
>> I am attempting to use TaoSetVariableBounds via petsc4py. Is there a way
>> to set only lower bounds or upper bounds and not both? In PETSc I could
>> replace one of the Vecs with NULL, but how would I do that with
>> tao.setVariableBounds(...)?
>>
>> It seems right now I can only do tao.setVariableBounds(lb_vec,ub_vec),
>> and from inspection of the python source code, it seems I have to specify
>> both?
>>
>
> Can you jsut give None?
>
>   Matt
>
>
>> Thanks,
>> Justin
>>
>
>
>
> --
> What most experimenters take for granted before they begin their
> experiments is infinitely more interesting than any results to which their
> experiments lead.
> -- Norbert Wiener
>
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