Hi Joris!
Ouch, I missed this e-mail last july. I hope that a late answer is
better than none ...
On Thu, Jul 29, 2010 at 05:56:22AM -0700, jvkersch wrote:
> Let me answer you both in one post, since I think your solutions might
> be related. I agree with Simon that this is the offending line:
>
> tester.assert_(isinstance(self,
> self.parent().category().element_class))
>
> Now, by adding the line
>
> Element = DifferentialForm
>
> to my parent class as Florent suggested, I tried to make it so that
> element_class refers to DifferentialForm. However, the assert still
> fails. Is there an example of a minimal code using the categories
> framework that I could adapt?
See the files in sage.categories.examples. You can also access them
through, e.g.:
sage: S = Semigroups().example()
sage: S??
> I tried to find out where the problem might be by trying a standard
> type of element, but these problems persist:
>
> sage: u = polygen(QQ)
> sage: isinstance(u, u.parent().category().element_class)
> False
>
> In the meantime, I see that SteenrodAlgebra has also this problem....
>
> Any ideas?
I would need to run your code to be more specific. Feel free to send
it to me if this is still relevant.
Best,
Nicolas
--
Nicolas M. Thiéry "Isil" <nthi...@users.sf.net>
http://Nicolas.Thiery.name/
--
To post to this group, send an email to sage-devel@googlegroups.com
To unsubscribe from this group, send an email to
sage-devel+unsubscr...@googlegroups.com
For more options, visit this group at http://groups.google.com/group/sage-devel
URL: http://www.sagemath.org
