On Sun, 29 Oct 2006 09:08:27 -0700, David Harvey
<[EMAIL PROTECTED]> wrote:
> You CAN export module-level cdef functions from one pyrex module to
> another.
I didn't realize this...
> I added the following to arith.pyx:
>
> ==========================
> cdef public int my_function(int x):
> return x+1
> ==========================
>
>
> I didn't add anything to arith.pxd.
>
> Then pyrexc generates a file "arith.pxi".
> Then I added the following to modular/modsym/p1list.pyx:
>
> ==========================
> include '../../ext/arith.pxi'
>
> def test_my_function(x):
> return my_function(x)
> ==========================
>
>
> And I can call test_my_function from external python code and it works
> as expected.
>
> The weird thing is that I can't make it so that you need to call e.g.
> sage.ext.arith.my_function. It really becomes global, which is probably
> not such a good thing.
It's global only to the module (not to all SAGE or something).
That's definitely confusing.
> Probably still better hygiene to keep things in classes as they are
> currently.
WAIT !!! I just figured out something cool.
(1) Take the line from from arith.pxi and copy it into arith.pxd.
(2) Delete "include '../../ext/arith.pxi'" from p1list.pyx.
(3) Now access to the module-level function works with full scoping,
e.g.,
def test_my_function(x):
return sage.ext.arith.my_function(x)
--
Here's everything I did for my test:
(1) In arith.pyx I put:
cdef public int foo(x):
return x*x
(2) In arith.pxd I put:
cdef extern int foo(object)
(3) In p1list.pyx I put:
def test_foo(x):
return sage.ext.arith.foo(x)
---
After building, from the interpreter I did this:
sage: import sage.modular.modsym.p1list as p
sage: p.test_foo(10)
100
---
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