C Extension - return an array of longs or pointer?

[Brandon K]

All the veteran programmers out there can correct me, but the way I did 
it in my extension was this:

static PyObject *wrap_doNumberStuff(PyObject* self, PyObject* args)
{
	char* in = 0;
	char* x = 0;
	long* result = 0;
	int i = 0;
	PyObject* py = PyTuple_New()
	int ok = PyArg_ParseTuple(args,"ss",&in, &x);
	if(!ok) return NULL;

	result = doNumberStuff(in,x):
	len = sizeof(result)/sizeof(long)
	for(i;i < len; i++)
		PyTuple_SET_ITEM(py, i,Py_BuildValue("l",*result[i])	
}

Simple enough idea...i'm not quite sure if I've done everything 
correctly with the pointers, but I'm sure you can figure that out, the 
algorithm is simple enough.

> Hi,
>    I have been posting about writing a C extension for Python...so far,
> so good.  At least for the "simple" functions that I need to wrap.
> 
> Ok, my c function looks like...
> 
> MY_NUM *doNumberStuff(const char *in, const char *x) { ... }
> 
> MY_NUM is defined as, typedef unsigned long MY_NUM;  (not sure if that
> matters, or can i just create a wrapper which handles longs?)
> 
> anyhow..for my wrapper I have this..
> 
> static PyObject *wrap_doNumberStuff(PyObject *self, PyObject args) {
>     char *in = 0;
>     char *x = 0;
>     long *result = 0;
>     int ok = PyArg_ParseTuple(args, "ss", &in, &x);
>     if (!ok) return 0;
> 
>     result = doNumberStuff(in, x);
> 
>     return Py_BuildValue("l", result);
> }
> 
> ...my question is...in the c code, result is a pointer to an array of
> longs, how can I get the returned result to be a list or something
> similar to an array in Python?
> 
> ...I also have a function which returns a character array (denoted by a
> char *)...would it work the same as the previous question?
> 
> Thanks!!
> 


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