Hi Joshua, Sorry, in my previous e-mail I forgot this was the ParaView and not VTK mailing list, so I posted a vtkpython script. What I said still applies if you are using the Python Programmable Filter, but of course you can use ParaView to load the dataset.
pdi = self.GetPolyDataInput() pdo = self.GetPolyDataOutput() s=pdi.GetCellData().GetAbstractArray(0) print s.GetVariantValue(1).ToString() # Just copy the input to make ParaView happy: pdo.DeepCopy( pdi ) This works for me with the political.vtp dataset http://vtk.org/gitweb?p=VTKData.git;a=blob_plain;f=Data/political.vtp;hb=HEAD Does that address your problem? Or are you writing client-side python scripts using the simple interface to retrieve metadata from the server? David >> I have written a custom filter for Heliospheric data, and I am placing the >> model metadata into the Field Data section of ParaView. >> >> Many of the metadata items are strings. I can view these strings just fine >> in Spread Sheet view, but anytime I try to get them out of Field Data via >> python, I get a null value return. Doubles and Ints return just fine, but I >> cannot seem to figure out how to get the strings. >> >> Can someone point me in the right direction for retrieving the strings from >> Field Data via Python? > > What method are you using to get the array from the vtkDataSetAttributes > instance that holds the field data? You need to use GetAbstractArray instead > of GetArray. Below is a small example that gets string values from cell data > on the political.vtp file included in VTKData. If you have an example file > with strings in field data, I can take a look at that, too. It should be as > simple as replacing the GetCellData() method with GetFieldData(). > > David > > from vtk import * > rdr = vtkXMLPolyDataReader() > rdr.SetFileName( '/path/to/VTKData/Data/political.vtp' ) > rdr.Update(); > mesh = rdr.GetOutput() > cd = mesh.GetCellData() > print 'Should have 3 cell data arrays', cd.GetNumberOfArrays() > cd.GetArray(0) # Returns None > sa = cd.GetAbstractArray(0) > print 'Array has %d tuples (should be 980)' % sa.GetNumberOfTuples() > print 'Should be Albania:', sa.GetVariantValue(1).ToString() > _______________________________________________ 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://www.paraview.org/mailman/listinfo/paraview
