[Paraview-developers] Python programmable source acting as filereader

[Daan van Vugt]

Hi Utkarsh,

When I do that I get a segfault, with the following backtrace:

=========================================================
Process id 7407 Caught SIGSEGV at 0x0 address not mapped to object
Program Stack:
WARNING: The stack trace will not use advanced capabilities because this is
a release build.
0x7f27d2933080 : ??? [(???) ???:-1]
0x7f27d242a536 : vtkProgrammableFilter::RequestData(vtkInformation*,
vtkInformationVector**, vtkInformationVector*)
[(libvtkFiltersProgrammable-pv5.2.so.1) ???:-1]
0x7f27d26f7880 :
vtkPythonProgrammableFilter::ProcessRequest(vtkInformation*,
vtkInformationVector**, vtkInformationVector*)
[(libvtkPVClientServerCoreCore-pv5.2.so.1) ???:-1]
0x7f27c93e3e1b : vtkFileSeriesReader::RequestData(vtkInformation*,
vtkInformationVector**, vtkInformationVector*)
[(libvtkPVVTKExtensionsDefault-pv5.2.so.1) ???:-1]

(this occurs before any of my python code has been executed)

Thanks,
Daan

On Tue, Jan 24, 2017 at 3:39 PM, Utkarsh Ayachit <
utkarsh.ayachit at kitware.com> wrote:

> Daan,
>
> Can you try changing the `si_class` attribute in the XML for the proxy to
> be `vtkSIMetaReaderProxy`? I suspect the classname was changed at some
> point. If that works, I can update the Wiki.
>
> Thanks
> Utkarsh
>
> On Thu, Jan 19, 2017 at 11:01 AM, Daan van Vugt <daanvanvugt at gmail.com>
> wrote:
>
>> Hi,
>>
>> I would like to create a plugin that uses h5py and numpy to read a file,
>> do some operations on it and return VTK objects.
>> Would it be possible to do the same thing as
>> http://www.paraview.org/Wiki/Animating_legacy_VTK_file_serie
>> s#Making_custom_readers_work_with_file_series
>> but instead of using a vtkPDataSetReader use a
>> vtkPythonProgrammableSource?
>>
>> I have made a (very naive) try, attached to this post.
>> When using this to read a series of files I get the errors (version 5.2.0
>> 64-bit) shown below.
>> To test, just use any hdf5 file. (.h5)
>>
>> Thanks for any help,
>> Daan
>>
>>
>>
>>
>> ERROR: In /home/buildslave/dashboards/buildbot/paraview-pvbinsdash-lin
>> ux-shared-release_opengl2_qt4_superbuild/source-paraview/
>> ParaViewCore/ServerImplementation/Core/vtkPVSessionCore.cxx, line 439
>> vtkPVSessionCore (0x100da30): Failed to instantiate
>> vtkSIFileSeriesReaderProxy
>>
>>
>> global_id: 4875
>> location: 2
>> [paraview_protobuf.DefinitionHeader.client_class]: "vtkSMSourceProxy"
>> [paraview_protobuf.DefinitionHeader.server_class]:
>> "vtkSIFileSeriesReaderProxy"
>> [paraview_protobuf.ProxyState.xml_group]: "sources"
>> [paraview_protobuf.ProxyState.xml_name]: "JorekReadH5"
>> [paraview_protobuf.ProxyState.subproxy] {
>>   name: "Reader"
>>   global_id: 4864
>> }
>> ############ ABORT #############
>> ERROR: In /home/buildslave/dashboards/buildbot/paraview-pvbinsdash-lin
>> ux-shared-release_opengl2_qt4_superbuild/source-paraview/
>> ParaViewCore/ServerImplementation/Core/vtkPVSessionCore.cxx, line 794
>> vtkPVSessionCore (0x100da30): No object with global-id: 4875
>>
>>
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