How can I return an array from C to python

[shashi59]

Now i need information about interface c and python.Now i call c function from python but i dont know how to return a array from c to python

[bartonc]

Now i need information about interface c and python.Now i call c function from python but i dont know how to return a array from c to python

You'll have to remind me which tool you are using. Also, please post an example of what you are working on.

[shashi59]

#include <Python.h>
#include <Numeric/arrayobject.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>

#define IDENTITY_DOC "\
This method simply unpacks the Array (so that it could be modified)\
and then returns it unchanged."
static PyObject *identity(PyObject *self, PyObject *args)
{
int i,n;
PyObject *input;
PyArrayObject *array;
char *aptr;

if (!PyArg_ParseTuple(args, "O", &input ))
return NULL;
array = (PyArrayObject *) PyArray_ContiguousFromObject(input, PyArray_INT, 0, 3);
if (array == NULL)
return NULL;

// Compute Size of Array
if(array->nd == 0)
n = 1;
else {
n = 1;
for(i=0;i<array->nd;i++)
n = n * array->dimensions[i];
}

aptr=(char*)(array->data);

// Do Your Array Operation(s)

// Return the result
return PyArray_Return(array);
}


this is my wrapper code in c.in this code finally i was return a array (pyArray_Return(array).so how can i get the return value in python


And also i had Python2.5

[shashi59]

Now i need information about interface c and python.Now i call c function from python but i dont know how to return a array from c to python

this is my samplecode

#include <Python.h>
#include <Numeric/arrayobject.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
 
#define IDENTITY_DOC "\
This method simply unpacks the Array (so that it could be modified)\
and then returns it unchanged."
static PyObject *identity(PyObject *self, PyObject *args)
{
int i,n;
PyObject *input;
PyArrayObject *array;
char *aptr;
 
if (!PyArg_ParseTuple(args, "O", &input ))
return NULL;
array = (PyArrayObject *) PyArray_ContiguousFromObject(input, PyArray_INT, 0, 3);
if (array == NULL)
return NULL;
 
// Compute Size of Array 
if(array->nd == 0)
n = 1;
else {
n = 1;
for(i=0;i<array->nd;i++) 
n = n * array->dimensions[i];
} 
 
aptr=(char*)(array->data);
 
// Do Your Array Operation(s)
 
// Return the result
return PyArray_Return(array);
}
 
 

this is my wrapper code in c.in this code finally i was return a array (pyArray_Return(array).so how can i get the return value in python


And also i had Python2.5

[card]

Did you ever figure this out? I'm new to the forum, but I have the answer if you still need it.

[bartonc]

Did you ever figure this out? I'm new to the forum, but I have the answer if you still need it.

Hello, card. Welcome to the Python Forum on TheScripts.

Please feel free to update any posts that may assist others in the future.
We appreciate any contribution and hope to be able to assist you with you queries.

Thanks for joining.