[C++-sig] failed in PyImport_Import()

[Gustavo Carneiro]

On 25/10/2007, Shrikant Chikhalkar <shrikantvc at gmail.com> wrote:
>
> Hi,
>
> i am tring to call python function from 'C' program. i get NULL value
> return by PyImport_Import()
>
> following is the code. code is copied from
> http://www.codeproject.com/cpp/embedpython_1.asp
>
> following file is saved as
>
> call_function.c
>
> /************************************************************************************************************/
>
>
> // call_function.c - A sample of calling
> // python functions from C code
>
> //
> #include <Python.h>
>
> int main(int argc, char *argv[])
> {
>
>     PyObject *pName, *pModule, *pDict, *pFunc, *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))
>     {
>         PyObject_CallObject(pFunc, NULL);
>     } else
>     {
>
>         PyErr_Print();
>     }
>
>     // Clean up
>     Py_DECREF(pModule);
>     Py_DECREF(pName);
>
>     // Finish the Python Interpreter
>
>     Py_Finalize();
>
>     return 0;
> }
>
> /************************************************************************************************************/
>
> python file saved as
>
> 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
>
>
> /************************************************************************************************************/
>
> $gcc -g call_function.c  -lpython2.5 -ocall_function
> $./call_function py_function.py multiply


Shouldn't this be:
   $./call_function py_function multiply

I.e., you the module name should not have a .py extension.

i get following output
>
> ImportError: No module named py_function
> Failed to load "py_function"
>
> when i kdbg(debug) it i vet NULL value returned from PyImport_Import()..
>
> can any one please find out the error that i am doing.
>
> --
> Shrikant
>
>
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>
>


-- 
Gustavo J. A. M. Carneiro
INESC Porto, Telecommunications and Multimedia Unit
"The universe is always one step beyond logic." -- Frank Herbert
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