dolfin team mailing list archive

[David Beacham <d.beacham07@xxxxxxxxxxxxxx>]

Johan Hake wrote:
> On Wednesday 16 December 2009 09:28:21 David Beacham wrote:
>   
> > Hi,
> >
> > I'm not sure if it's my relative inexperience with python, but I can't
> > find the coordinates x in data, when overloading eval_data in
> > Expression. I'm guessing from doxygen/pydoc that they should be available?
> >     
>
> Have you tried:
>
>   x = data.x()
>
>   
No, I don't seem to have the Data.x() method either:

(Pdb) p data.x()
*** AttributeError: AttributeError("'Data' object has no attribute 'x'",)

although everything else from the cpp side is showing up and is useable:

(Pdb) p dir(data)
['__class__', '__delattr__', '__dict__', '__doc__', '__format__', 
'__getattribute__', '__hash__', '__init__', '__module__', '__new__', 
'__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', 
'__str__', '__subclasshook__', '__swig_destroy__', '__weakref__', 
'cell', 'clear', 'facet', 'geometric_dimension', 'normal', 'on_facet', 
'set', 'this', 'thisown', 'ufc_cell']

FWIW, I can get Data.x to work in cpp.

> We needed to make the x attribute a method returning the x array in Python.
>
> Johan
>
>   
> > David
> >
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> >