Re: [f2py] wrapping c with f2py

Darn!! I wrote too soon!  I just got it to work with:


# -------------- padd.pyf -------------- #

python module padd
  interface
    function cadd(a, b) result(c)
      integer intent(c) :: cadd
      integer intent(c) :: a
      integer intent(c) :: b
      integer intent(c) :: c
    end function cadd
  end interface
end python module padd

# ----------------------------------------- #


I don't really understand how this all works yet, but I'm trying to 
follow various examples.  I'm a confirmed high-level programmer (or 
scripter as some like to call us).

I'm working up to be able to wrap some sophisticated c code, so I'll 
probably be back...

Thanks, Ariel

Ariel Balter wrote:
> Stunned by the almost instantaneous response!
>
> Yes, installing python-dev did make that example work.  So, my system 
> appears to be able to handle the necessities now.  Thanks!
>
> Now, perhaps you can please help me with this slightly more elaborate 
> example:
>
> // ------------  cadd.c ------------------- //
>
> #include <stdio.h>
> #include <stdlib.h>
>
>
> int cadd(int a, int b){
>   int c = a + b;
>   printf("sum of %i and %i is %i\n", a, b, c );
>   return c;
> }
>
> // -------------------------------------------- //
>
> # -------------- padd.pyf -------------- #
>
> python module padd
>  interface
>    function cadd(a, b, c) result c
>      integer intent(c) cadd
>      integer intent(c) a
>      integer intent(c) b
>      integer intent(c) c
>    end function cadd
>  end interface
> end python module padd
>
> # ----------------------------------------- #
>
>
> I can compile with "f2py -c pyadd.pyf cadd.c" just fine.  BUT, when I 
> try to import into python, I get:
>
>> >>> import padd
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>> ImportError: ./padd.so: undefined symbol: unknown_function_
>
> I've tried a couple of different formats for the PYF file, but I don't 
> seem to have found the right approach.
>
> Thanks much, Ariel
>

-- 
/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\

Ariel I Balter, Ph.D.
Postdoc
Biological Monitoring/Modeling
Fundamental and Computational Sciences Directorate

Pacific Northwest National Laboratory Mail:
PO Box 999, MS P7-58,Richland, WA 99352
Shipping:
790 6th Street, MS P7-58, Richland, WA 99354

Tel:  509-376-7605 Cell:  509-713-0087
ariel.balter-Y2zl/[email protected]
www.arielbalter.com
www.pnl.gov