callling python function in c
masood shaik
masood.524 at gmail.com
Sun Oct 16 04:03:51 EDT 2011
Hi
I am trying to call python function from c code.The following
program i got from the web source while i am trying to run this
program it throws an segmentation fault.I am working on Ubuntu 10.10
version.Can anyone guide me please
The following program
call_function.c
// call_function.c - A sample of calling python functions from C code
//
#include <Python.h>
#include<stdio.h>
int main(int argc, char *argv[])
{
int i;
PyObject *pName, *pModule, *pDict, *pFunc, *pArgs, *pValue;
if (argc < 3)
{
printf("Usage: exe_name python_source function_name\n");
return 1;
}
// Initialize the Python Interpreter
Py_Initialize();
// Build the name object
pName = PyString_FromString(argv[1]);
// Load the module object
pModule = PyImport_Import(pName);
// pDict is a borrowed reference
pDict = PyModule_GetDict(pModule);
// pFunc is also a borrowed reference
pFunc = PyDict_GetItemString(pDict, argv[2]);
if (PyCallable_Check(pFunc))
{
// Prepare the argument list for the call
if( argc > 3 )
{
pArgs = PyTuple_New(argc - 3);
for (i = 0; i < argc - 3; i++)
{
pValue = PyInt_FromLong(atoi(argv[i + 3]));
if (!pValue)
{
PyErr_Print();
return 1;
}
PyTuple_SetItem(pArgs, i, pValue);
}
pValue = PyObject_CallObject(pFunc, pArgs);
if (pArgs != NULL)
{
Py_DECREF(pArgs);
}
} else
{
pValue = PyObject_CallObject(pFunc, NULL);
}
if (pValue != NULL)
{
printf("Return of call : %ld\n", PyInt_AsLong(pValue));
Py_DECREF(pValue);
}
else
{
PyErr_Print();
}
} else
{
PyErr_Print();
}
// Clean up
Py_DECREF(pModule);
Py_DECREF(pName);
// Finish the Python Interpreter
Py_Finalize();
return 0;
}
py_function.py
'''py_function.py - Python source designed to demonstrate the use of
python embedding'''
def multiply():
c = 12345*6789
print 'The result of 12345 x 6789 :', c
return c
def multiply1(a,b):
c = a*b
print 'The result of', a, 'x', b, ':', c
return c
Regards
Masood
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