CExtenmodule.c

#include <Python.h> //Python dev module

// Define a function
static PyObject* CExten_CCat(PyObject* self, PyObject* args){

   const char* file_path;
   FILE* fd;
   char chunk[128];

   //parsing the arguments (only if needed)
   if(!PyArg_ParseTuple(args, "s", &file_path)){
      return NULL; //send error to the python interpreter
   }

   if((fd = fopen(file_path,"r")) < 0){
      return NULL;
   }

   while((fgets(chunk,sizeof(chunk),(FILE*)fd)) != NULL){
      printf("%s",chunk);
   }

   printf("\n");
   fclose(fd);

   Py_INCREF(Py_None);
   return Py_None;

}
static PyMethodDef CExten_methods[] = {
    //Python Func Name    C Func Name    Arg Count        Description
    {"CCat",              CExten_CCat,   METH_VARARGS,    NULL},
    {NULL,NULL,0,NULL}    //ending sentinel
};

PyMODINIT_FUNC initCExten(void){
    PyObject *m;
    m = Py_InitModule("CExten",CExten_methods);
    if(m == NULL){
        return;
    }
}