Problems returning data from embedded Python
Cromulent
cromulent at justextrememetal.com
Tue Aug 12 18:48:54 EDT 2008
On 2008-08-12 05:37:53 +0100, "Gabriel Genellina"
<gagsl-py2 at yahoo.com.ar> said:
> En Mon, 11 Aug 2008 12:58:00 -0300, Cromulent
> <cromulent at justextrememetal.com> escribi�:
>
>> <snip>
>
> Uh? You have a complete API for working with list objects, the
> functions named PyList_*
> See http://docs.python.org/api/listObjects.html
> There is also an abstract layer that works both with lists and tuples:
> http://docs.python.org/api/sequence.html
> If that's not what you are after, please provide more details...
Spoke too soon.
Right, I've rewritten the Python program and it returns a tuple of
lists and one integer. Basically as you saw before, the python program
reads a file in, splits it into elements that were separated by a comma.
The new program just puts each element into its own list. Here is a
line from the file I am reading in:
15-Jul-08,37.70,37.70,36.43,36.88,102600
so basically I have 6 lists and one int (which is the total number of
lines read by the program) I then return that tuple to the C program.
After that I call the following:
error = PyArg_ParseTuple(value, "isffffi", &totalLines, &finopen,
&finclose, &finhigh, &finlow, &finvolume);
but that will only give me the first element of the list. What I would
like to do is return the total number of lines read separately, then
use that to allocate a C99 style variable sized array and then loop
through the call to PyArg_ParseTuple to populate the array. The problem
with that is that I don't think PyArg_ParseTuple is designed in that
way. It will put the contents of the list in the variable and not split
it up so that I can populate an array.
Am I making any sense? Probably not, but it is hard to explain.
Thanks for any help.
--
"I disapprove of what you say, but I'll defend to the death your right
to say it." - Voltaire
More information about the Python-list
mailing list