[Qgis-user] Sextante GRASS Voronoi Polygons

[bjorn.burr.nyberg at gmail.com]

Hej, 

I have a general question on the correct syntax of using voronoi lines with
sextante in the python console. Currently I am trying to define the voronoi
polygons as either 

x= st.runalg("grass:v.voronoi","Nodes",'Yes','No',None,None,None,0,None) or 
x= st.runalg("grass:v.voronoi","Nodes",True,False,None,None,None,0,None) 

and while both syntax run without error, the resulting voronoi polygons are
simply a box consisting of four lines? The algorithm work fine within the
toolbox or using the modelbuilder - 

Note that copying the python syntax generated by the modelbuilder and
placing in the python console does not work for me either... 
x=st.runalg("grass:v.voronoi", "Nodes", True, False, None, -1.0, 0.0001, 0,
None) 

Any suggestions? 

Cheers, 
Bjorn 

On a side note does anyone know the proper syntax in qgis 2.0 to add an
attribute to a writer?
(http://www.qgis.org/pyqgis-cookbook/vector.html#writing-vector-layers) 
i.e. 
fet.addAttribute(0, QVariant(1)) 
AttributeError: 'QgsFeature' object has no attribute 'addAttribute' 
fet.setAttributeMap( { 0 : QVariant(1) }) 
AttributeError: 'QgsFeature' object has no attribute 'setAttributeMap' 



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