API/C memory mananegemnt problem

[fumana]

Hi everybody,
I have a problem with Python/C API and memory management.

I'm using 
Python 2.3.5 (#1, Jan  4 2006, 16:44:27)
[GCC 4.0.2 20050901 (prerelease) (SUSE Linux)] on linux2

In my C-module I have a loop like this:
***

int size=1000;

output=(double *) calloc(size, sizeof(double));

py_output=PyList_New(0);

for(i=0; isize; i++){
  tmp=PyFloat_FromDouble(output[i]);
  PyList_Append(py_output, tmp); 
}

free(outout);

return py_output;

***

It returns to python module a (very large) list.

Problem: when I delete the list in python module (with python del statement) 
not all memory is relased.

It look like all 1000 tmp PyFloat allocated in C code 
remain stored in memory.

Somebody can help me?

Thanks.

marco
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API/C memory mananegemnt problem

[Marco Fumana]

Thank for your help.

I have try to follow your suggestion but I seem to fail.

Now my C-module (call it C_Core) code is:

***
/* create_list function */
int size=1000;

output=(double *) calloc(size, sizeof(double));
py_output=PyList_New(0);
for(i=0; isize; i++){
   tmp=PyFloat_FromDouble(output[i]);
   PyList_Append(py_output, tmp);
   Py_DECREF(tmp); // append adds a reference

 }

free(outout);

return py_output;
**

with del statement all memory is relased, but I have a malformed list.

In python shell:
# Call C function an create a list
alfa=C_Core.create_list()

# check the list
len(alfa)
1000
# OK
alfa[1]
Segmentation fault


On the other size your last option with 
PyList_SET_ITEM(py_output, tmp)  statement 
is quick, but I have still memory problem.

Any idea?

Thank a lot
marco
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