Dear Robert,
On 7 Feb., 04:18, kcrisman <kcris...@gmail.com> wrote:
> Could you be more specific (e.g. give a toy example of how to
> "cimport" Permutations(n) and then use it to do something trivial, for
> someone who is still very new at using Cython)?
Indeed, I think it would be good to have *Sage-specific* examples
around.
For example, when I wrote some Cython modules, it was easy to cimport
an extension class from one of my modules into another of my modules
(both sitting in the same directory). This works as promised by the
Cython documentation.
Also, it was no problem to import (without 'c'), say, PolynomialRing
from `sage.rings.polynomial.polynomial_ring_constructor`.
But when I tried `from
sage.rings.polynomial.multi_polynomial_libsingular cimport
MPolynomial_libsingular`, things did not work.
Why? Is it needed to provide some sort of 'include' directory to the
compiler? But I would rather expect that Cython would know where to
find `MPolynomial_libsingular` if I explicitly give its location. So,
how to cimport an extension class from Sage?
Best regards,
Simon
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