How send LIST to C extension?

[Christian Seberino]

Vincent

Why would you extract elements of list/tuples with your
way instead of PyArg_ParseTuple?? (I finally got
PyArg_ParseTuple to work for tuples.)

Chris

"vincent wehren" <vincent at visualtrans.de> wrote in message news:<bppulg$9sa$1 at news2.tilbu1.nb.home.nl>...
> "Christian Seberino" <seberino at spawar.navy.mil> schrieb im Newsbeitrag
> news:bf23f78f.0311221144.74df07eb at posting.google.com...
> | Vincent
> |
> | Thanks.  Your example with "0" will make *seq point to the list I believe.
> 
> Make sure it's "O" (the letter O) not "0"...
> 
> 
> 
> |
> | Can I extract the elements of the list into C variables
> |
> | with PyArg_ParseTuple if I didn't want to work with PyObject directly??
> 
> Sure. That's the whole point... You can use seq (which is a PyObject) and
> subject it to all kinds
> of functions ( e.g. PyList_GET_ITEM(seq, i) which retuns the i'th item of
> list seq ))
> 
> 
> |
> | Perhaps this is a bad idea and your way is always better???
> | (python.org docs had example of extracting elements of a tuple
> | with PyArg_ParseTuple but I couldn't do it.)
> 
> So, what did you try?
> 
> Vincent Wehren
> 
> 
> |
> | Chris
> |
> |
> |
> | "vincent wehren" <vincent at visualtrans.de> wrote in message
>  news:<bpnmr7$flr$1 at news3.tilbu1.nb.home.nl>...
> | > "Christian Seberino" <seberino at spawar.navy.mil> schrieb im Newsbeitrag
> | > news:bf23f78f.0311211356.7368197c at posting.google.com...
> | > | I already sent a post about problems sending list as argument in a C
>  extension.
> | > |
> | > | I think I'll start over and just ask if anyone has done this
>  successfully.
> | > |
> | > | Can you send me code that does this??
> | > |
> | > | (I tried PyArg_ParseTuple("[ii]",...) but apparently there is more to
>  it
>  than
> | > | just adding brackets.
> | >
> | >
> | > In your function you need something like
> | >
> | >     PyObject* seq;
> | >
> | >     if(!PyArg_ParsTuple(args, "O", &seq))
> | >        return 0;
> | >
> | >
> | > To do something useful with seq, you might want to look at the
>  PySequence_*
> | > function family in the Python/C API Reference Manual (s.
> | > http://www.python.org/doc/current/api/sequence.html)
> | >
> | > HTH,
> | > Vincent Wehren
> | >
> | >
> | >
> | >
> | >
> | > |
> | > | chris