[Paraview] vtkPVTrivialProducer issues

Wed Apr 28 18:58:57 EDT 2010

You can read about python scripting in paraview here:

http://www.paraview.org/Wiki/ParaView/Python_Scripting

Paraview has the concept of an active source.  Making a source the active
source in python is like selecting it in the gui.  For all operations, if no
input is specified, the active source is used.  You can get the active
source with GetActiveSource().  When you create a new object, like
TrivialProducer(), it becomes the active source.

When creating a new source (or writer), you can specify the input(s)
explicity using arguments to the constructor.  Or you can specify a Input
keyword argument that takes a list.  Such as:

AppendDatasets(source1, source2)
 or
AppendDatasets(Input=[source1, source2])

Pat

On Wed, Apr 28, 2010 at 6:22 PM, <wastrel at gmail.com> wrote:

> Thanks. I just tired it and it seems to work. But how does the writer
> figure out the input object?
>
> Is there any detailed documentation on pvpython?
>
> Thanks,
>
> Ken
>
>
>
>
> On Sun, Apr 25, 2010 at 6:37 AM, Utkarsh Ayachit <
> utkarsh.ayachit at kitware.com> wrote:
>
>> Here's a modified version of the script, using the updated python
>> scripting style (since ParaView 3.6)
>>
>>
>> from paraview.simple import *
>> from paraview.simple import servermanager as sm
>> from paraview import vtk
>>
>> # Set the pvpython path
>> INPUTFILE="test.vtu"
>> OUTPUTFILE="tested.vtu"
>>
>> # create a reader
>> reader=XMLUnstructuredGridReader(FileName=INPUTFILE)
>>
>> # get the data i.e moves data from the server to the client
>> data=sm.Fetch(reader)
>>
>> tp=TrivialProducer()
>> obj=tp.GetClientSideObject()
>> obj.SetOutput(data)
>>
>> writer=XMLUnstructuredGridWriter(DataMode=2,FileName=OUTPUTFILE)
>> writer.UpdatePipeline()
>>
>>
>> Utkarsh
>>
>> On Sat, Apr 24, 2010 at 3:24 PM,  <wastrel at gmail.com> wrote:
>> > I simplified the code and tried it on Paraview3.8.0. It reads in a vtu
>> file,
>> > fetch the data and then write it back to a new file. But still got
>> errors as
>> > follow.
>> >
>> > Script:
>> >
>> > from paraview.simple import *
>> > from paraview.simple import servermanager as sm
>> > from paraview import vtk
>> >
>> > # connect internally
>> > connection=sm.Connect()
>> >
>> > # Set the pvpython path
>> > INPUTFILE="test.vtu"
>> > OUTPUTFILE="tested.vtu"
>> >
>> > # create a reader
>> > reader=sm.sources.XMLUnstructuredGridReader(FileName=INPUTFILE)
>> >
>> > # get the data i.e moves data from the server to the client
>> > data=sm.Fetch(reader)
>> >
>> > tp=sm.sources.TrivialProducer()
>> > obj=tp.GetClientSideObject()
>> > obj.SetOutput(data)
>> >
>> >
>> writer=sm.writers.XMLUnstructuredGridWriter(DataMode=2,FileName=OUTPUTFILE,Input=obj)
>> >
>> > writer.UpdatePipeline()
>> >
>> >
>> > Errors:
>> >
>> > getting appended
>> > vtkReductionFilter : [ ...........]
>> > Traceback (most recent call last):
>> >   File "convert.py", line 88, in <module>
>> >
>> >
>> writer=sm.writers.XMLUnstructuredGridWriter(DataMode=2,FileName=OUTPUTFILE,Input=obj)
>> >   File
>> >
>> "/home/kitware/ParaView-3-8/ParaView-3.8/ParaView3Bin/Utilities/VTKPythonWrapping/paraview/servermanager.py",
>> > line 186, in __init__
>> >   File
>> >
>> "/home/kitware/ParaView-3-8/ParaView-3.8/ParaView3Bin/Utilities/VTKPythonWrapping/paraview/servermanager.py",
>> > line 204, in __setattr__
>> >   File
>> >
>> "/home/kitware/ParaView-3-8/ParaView-3.8/ParaView3Bin/Utilities/VTKPythonWrapping/paraview/servermanager.py",
>> > line 2361, in setProperty
>> >   File
>> >
>> "/home/kitware/ParaView-3-8/ParaView-3.8/ParaView3Bin/Utilities/VTKPythonWrapping/paraview/servermanager.py",
>> > line 253, in SetPropertyWithName
>> >   File
>> >
>> "/home/kitware/ParaView-3-8/ParaView-3.8/ParaView3Bin/Utilities/VTKPythonWrapping/paraview/servermanager.py",
>> > line 1162, in SetData
>> > AttributeError: SMProxy
>> >
>> >
>> >
>> > Any clues?
>> >
>> >
>> > On Sat, Apr 24, 2010 at 9:41 AM, Utkarsh Ayachit
>> > <utkarsh.ayachit at kitware.com> wrote:
>> >>
>> >> Here are my results from 3.7 (consequently 3.8 or git master should
>> >> work as well).
>> >>
>> >> >>> from paraview.simple import *
>> >> paraview version 3.7.0, Date: 2010-03-27
>> >> >>> TrivialProducer()
>> >> <paraview.servermanager.TrivialProducer object at 0x121587e90>
>> >> >>> servermanager.sources.TrivialProducer()
>> >> <paraview.servermanager.TrivialProducer object at 0x121587d50>
>> >>
>> >> Utkarsh
>> >>
>> >> On Fri, Apr 23, 2010 at 5:44 PM, Utkarsh Ayachit
>> >> <utkarsh.ayachit at kitware.com> wrote:
>> >> > You no longer need the initial part for loading the XML. You can
>> >> > directly use:
>> >> >
>> >> >  tp = sm.sources.TrivialProducer()
>> >> >
>> >> > and that should work.
>> >> >
>> >> > Utkarsh
>> >> >
>> >> > On Fri, Apr 23, 2010 at 5:09 PM,  <wastrel at gmail.com> wrote:
>> >> >> I used the the following snippet to generate data on the client side
>> >> >> but
>> >> >> ended up with errors:
>> >> >>
>> >> >> Code:
>> >> >> sm = servermanager
>> >> >> f = open('trivialproducer.xml', 'r')
>> >> >> parser = sm.vtkSMXMLParser()
>> >> >> parser.Parse(f.read())
>> >> >> parser.ProcessConfiguration(sm.vtkSMObject.GetProxyManager())
>> >> >> # Update the modules
>> >> >> sm._updateModules()
>> >> >>
>> >> >> tp = sm.sources.TrivialProducer()
>> >> >> obj = tp.GetClientSideObject()
>> >> >> obj.SetOutput(pd)
>> >> >>
>> >> >> # use tp as any other source proxy
>> >> >>
>> >> >>
>> >> >> trivialproducer.xml:
>> >> >>
>> >> >> <ServerManagerConfiguration>
>> >> >> <ProxyGroup name="sources">
>> >> >>
>> >> >> <SourceProxy name="TrivialProducer"
>> >> >> class="vtkPVTrivialProducer">
>> >> >> </SourceProxy>
>> >> >> </ProxyGroup>
>> >> >>
>> >> >>
>> >> >> Errors:
>> >> >> ERROR: In
>> >> >>
>> >> >>
>> /home/berk/Work/ReleaseBuilds/ParaView3/Servers/Common/vtkProcessModule.cxx,
>> >> >> line 1001
>> >> >> vtkProcessModule (0x807b790): Cannot create object of type
>> >> >> "vtkPVTrivialProducer".
>> >> >> while processing
>> >> >> Message 0 = New
>> >> >>   Argument 0 = string_value {vtkPVTrivialProducer}
>> >> >>   Argument 1 = id_value {40}
>> >> >>
>> >> >>
>> >> >> ERROR: In
>> >> >>
>> >> >>
>> /home/berk/Work/ReleaseBuilds/ParaView3/Servers/Common/vtkProcessModule.cxx,
>> >> >> line 1002
>> >> >> vtkProcessModule (0x807b790): Aborting execution for debugging
>> >> >> purposes.
>> >> >>
>> >> >> Abort
>> >> >>
>> >> >>
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>> >> >>
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>> >> >>
>> >> >> Please keep messages on-topic and check the ParaView Wiki at:
>> >> >> http://paraview.org/Wiki/ParaView
>> >> >>
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>> >> >>
>> >> >>
>> >> >
>> >
>> >
>>
>
>
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