Re: [Python-Dev] Please help in calling python fucntion from 'c'

Sept. 5, 2002


      "Praveen Patil" <praveen.patil@silver-software.com> writes:
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Hi,
I have written 'C' dll(MY_DLL.DLL) . I am importing 'C' dll in python
file(example.py).
I want to call python function from 'c' function.
For your reference I have attached 'c' and python files to this mail.
In my pc:
python code is under the directory D:\test\example.py
dll is under the directory C:\Program Files\Python\DLLs\MY_DLL.pyd
Here are the steps I am following.
step(1): I am calling 'C' function(RECEIVE_FROM_IL_S) from python.
         This 'C' function is existing imported dll(MY_DLL).
step(2): I want to call python function(TestFunction) from 'C'
function(RECEIVE_FROM_IL_S).
Python code is(example.py)  :-
----------------------------
import MY_DLL
G_Logfile          = None
def TestFunction():
    G_Logfile = open('Pytestfile.txt', 'w')
    G_Logfile.write("%s \n"%'I am writing python created text file')
    G_Logfile.close
    G_Logfile = None
#end def TestFunction
if __name__ == "__main__":
MY_DLL.RECEIVE_FROM_IL_S(10,50)
'C' code is (MY_DLL.c) :-
---------------------
#include <windows.h>
#include <stdio.h>
#include <Python.h>
PyObject* _wrap_RECEIVE_FROM_IL_S(PyObject *self, PyObject *args)
{
    FILE* fp;
    PyObject* _resultobj;
    int i,j;
if( !(PyArg_ParseTuple(args, "ii",&i,&j)))
    {
       return NULL;
    }
    fp= fopen("RECEIVE_IL_S.txt", "w");
    fprintf(fp, "i=%d   j=%d" , i,j);
    fclose(fp);
/* Here I want to call python function(TestFunction). Please suggest me
some solution*/
_resultobj = Py_None;
    return _resultobj;
}
static PyMethodDef MY_DLL_methods[] = {
      { "RECEIVE_FROM_IL_S", _wrap_RECEIVE_FROM_IL_S, METH_VARARGS },
      { NULL , NULL}
      };
__declspec(dllexport) void __cdecl initMY_DLL(void)
  {
    Py_InitModule("MY_DLL",MY_DLL_methods);
  }
Please anybody help me solving the problem.
Cheers,
Praveen.
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import MY_DLL
G_Logfile          = None
def TestFunction():
    G_Logfile = open('Pytestfile.txt', 'w')
    G_Logfile.write("%s \n"%'I am writing python created text file')
    G_Logfile.close
    G_Logfile = None
#end def TestFunction
if __name__ == "__main__":
MY_DLL.RECEIVE_FROM_IL_S(10,50)
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  filename="MY_DLL.c"
#include <windows.h>
#include <stdio.h>
#include <Python.h>
PyObject* _wrap_RECEIVE_FROM_IL_S(PyObject *self, PyObject *args)
{
    FILE* fp; =20
    PyObject* _resultobj;
    int i,j;
   =20
    if( !(PyArg_ParseTuple(args, "ii",&i,&j)))
    {
       return NULL;
    }
    fp=3D fopen("RECEIVE_IL_S.txt", "w");
    fprintf(fp, "i=3D%d   j=3D%d" , i,j);
    fclose(fp);
/* Here I want to call python function(TestFunction). Please suggest =
me some solution*/
_resultobj =3D Py_None;
    return _resultobj;
}
static PyMethodDef MY_DLL_methods[] =3D {
      { "RECEIVE_FROM_IL_S", _wrap_RECEIVE_FROM_IL_S, METH_VARARGS },
      { NULL , NULL}
      };
__declspec(dllexport) void __cdecl initMY_DLL(void)
  {
    Py_InitModule("MY_DLL",MY_DLL_methods);
  }
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Re: [Python-Dev] Please help in calling python fucntion from 'c'

Michael Hudson