We need that as local variables.

I agree that `Beautiful is better than ugly.` but `Simple is better than complex.` and `Flat is better than nested.` thus I suggest to leave it as it is for now. However, I'll keep this in the back of my mind and look at it again when the models branch is merged into astropy, which includes the chebychef polynomials and things like that, so that some of this code can be shortened anyway.