[Paraview] ParaView python vs VTK python api (UNCLASSIFIED)

[David E DeMarle]

Adding to what Andy and Seb said,

"ParaView can be viewed in some ways a wrapper around VTK filters" + that
often exist on remote MPI parallel processes + "."

In Paraview client side scripts (tools->Python Shell or pvpython or
pvbatch) you create python objects that create proxies that create remote
vtk objects somewhere. Which is why it is not typically safe to mix vtk and
paraview python code and do things like modifying the input data sets. See
python trace and the paraview python wiki page to learn about this level of
scripting.

Within the python programmable filter and source, you are running inside
those remote processes. Here the API is pretty much standard python wrapped
VTK. See the wiki page about python programmable filters for starters and
standard vtk documentation to learn details about this secondary level of
scripting.

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909

David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Wed, Aug 6, 2014 at 3:45 PM, Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:

> Hi Simon,
>
> if the VTK work that you are targeting is not parallel, you can directly
> run a vtkpython script inside pvpython or pvbatch.
> Otherwise Andy is right, you can not mix parallel ParaView and VTK python
> code.
>
> Seb
>
>
> On Wed, Aug 6, 2014 at 1:35 PM, Andy Bauer <andy.bauer at kitware.com> wrote:
>
>> It may not be possible to do what you want explicitly. ParaView can be
>> viewed in some ways a wrapper around VTK filters. You can try the
>> programmable filter which uses the VTK Python API but is still intended to
>> operate like a filter (i.e. not modifying the input data sets, etc.).
>>
>> Andy
>>
>>
>> On Wed, Aug 6, 2014 at 3:28 PM, Su, Simon M CTR USARMY ARL (US) <
>> simon.m.su.ctr at mail.mil> wrote:
>>
>>> Classification: UNCLASSIFIED
>>> Caveats: NONE
>>>
>>> Hello,
>>>
>>> I would like to run some of my VTK python code under ParaView (pvbatch or
>>> pvpython). Where can I find documentation on porting VTK python code to
>>> use
>>> ParaView python api? I need to create some VTK object in ParaView. Is
>>> there
>>> a shortcut to this (like being able to use VTK python api within ParaView
>>> Python environment)?  Or am I not making sense / asking the wrong
>>> question.
>>>
>>> Any help is much appreciated.
>>>
>>> Thanks
>>> -simon
>>>
>>> Classification: UNCLASSIFIED
>>> Caveats: NONE
>>>
>>>
>>>
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>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the ParaView Wiki at:
>> http://paraview.org/Wiki/ParaView
>>
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>>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/paraview
>
>
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