[Paraview] Different Python startup error message

[Eric E. Monson]

Hey John,

I need to do some more testing, but I may have gotten around that  
'GetDocumentation' error:

First, I deleted the SPHProbePointOverTime from CSCS_SPH_Server.xml  
(since I am trying to fix the Point Sprites problem first). Then, in  
rendering.xml, <PointSpriteRepresentationProxy  
name="PointSpriteRepresentation">, comment out the subproxy exposed  
properties lines for ColorMode and ColorChannelArray, so it looks like  
this:
      ....
       <SubProxy>
         <!--
           Mapper for high-res geometry.
         -->
         <Proxy name="Mapper"
                proxygroup="mappers"
                proxyname="PointSpriteMapper" />
         <ExposedProperties>
           <Property name="LookupTable" />
           <!-- <Property name="ColorMode" /> -->
           <Property name="MapScalars" />
           <Property name="ImmediateModeRendering" />
           <Property name="InterpolateScalarsBeforeMapping" />
           <Property name="UseLookupTableScalarRange" />
           <Property name="ClippingPlanes" />
           <Property name="NumberOfSubPieces" />

           <!-- <Property name="ColorChannelArray" /> -->
           <Property name="AlphaChannelArray" />
           <Property name="RadiusChannelArray" />
           ....

(Maybe the PointSpriteMapper doesn't have these properties to expose?)  
This got me through the "from paraview import servermanager" stage  
using pvpython. Then, to be able to load a saved meshless state file I  
also needed to comment out the line in servermanager.py which Jean  
Favre had trouble with (http://www.paraview.org/pipermail/paraview/2008-May/008120.html 
)

     rvname =  
vtkSMRenderViewProxy.GetSuggestedRenderViewType(connection.ID)
     if rvname:
         # loader.SetRenderViewXMLName(rvname)
         pm = ProxyManager()
         pm.LoadState(filename, ActiveConnection.ID, loader)

After this I was able to load a state file which displayed points  
using simple point sprites from Python and do a still frame render.  
I'll try more testing tomorrow, but maybe this will allow me to do  
batch animation rendering using the point sprites!

Talk to you later,
-Eric


On Jul 30, 2008, at 6:59 AM, John Biddiscombe wrote:

> Eric
>
>> ... and gets to the "representations", crapping out with  
>> "AttributeError: 'NoneType' object has no attribute  
>> 'GetDocumentation'" when trying to process  
>> PointSpriteRepresentation (from rendering.xml).
>>
>
> Thanks veryy much for this information. I spent a bit of time on it  
> last week, desperately trying to find out why the point sprite  
> representation causes this dodgyness. I failed. I ended up by having  
> a single 2 line xml entry with nothing in it at all, and this caused  
> the error. I tried cloning other ones and everything - but it seems  
> like as soon as I add a new anything to the representations this  
> error comes back.
>
> Can anyone tell me what the error really means?
>
> I tried adding methods for GetDocumentation, tried adding xml  
> entries for doc, removing them, everything, but since I don't really  
> know what the rror message is trying to tell me, I am clueless -  
> what is the NoneType object referred to, and why is the doc not found?
>
>
> JB