dolfin team mailing list archive

[Johan Hake <hake@xxxxxxxxx>]

On Friday 05 December 2008 18:02:07 Anders Logg wrote:
> I'm having problems getting vector-valued constants working. Take a
> look at
>
>     demo/pde/stokes/taylor-hood/python
>
> It reports
>
>     assert(isinstance(defaults[i], (dict, types.NoneType)),"Wrong type
>     in 'defaults'")
>    TypeError: 'NoneType' object is unsubscriptable
>
> It seems like defaults is set to None and then defaults is indexed.
>
> Any ideas?

Should be fixed now. I have added better argument checking to 
compile_function. But you have to send in a tuple of strings to 
compile_function if you want to produce a vector values function. A list is 
interpreted as len(cppexpr) number of scalar functions.

This is a bit fragile, but it is documented in the Function doc string.

Johan