dolfin team mailing list archive

[David Beacham <d.beacham07@xxxxxxxxxxxxxx>]

Johan Hake wrote:
> On Wednesday 16 December 2009 10:18:50 David Beacham wrote:
>   
> > 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.
> >     
>
> This should be fixed now.
>
> Johan
>
>   
Thanks for this, I can now see data.x, but it isn't returning the 
correct information:

(Pdb) !z = data.x()
(Pdb) z
array([], dtype=float64)
(Pdb) z.shape
(0,)

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