How to access C variables in Python code object generated by Py_C ompileString

[Borse, Ganesh]

Hi,
May you please help in using Py_CompileString & PyEval_EvalCode to parse+compile an expression at startup & evaluate that multiple times at runtime.
I want to use this in C++ program as below.

Here, the expression contains the variables like size, vol, ADV, etc. The values of these variables keep on changing for every user input in C++ program.
The problem I am facing is that, I am not able to pass these values from C++ code to Python code, when calling PyEval_EvalCode.

Can you please guide me about my following queries:
1) how can I make these variables in C++ to be available to Python compiled code at runtime?
2) my this code got compiled but when running, I got an error from Py_CompileString, as below. Why is it so?
  File "<string>", line 1
    if ( (size < 1000) & (vol < (0.001 * ADV)) & (prod=="Stock")): print "OK" 
    ^
SyntaxError: invalid syntax

  But when I executed the same code in python process, it worked fine.
3) Is this correct use of Py_CompileString, PyEval_EvalCode & Py_BuildValue functions?

Please help, guide.

Many thanks in advance.
Regards,
Ganesh

//-----------------------------------------------------
#include "Python.h"
#include "compile.h"
#include "eval.h"
#include "object.h"
#include <stdio.h>

typedef struct {
      long size;
      long ADV;
      long vol;
      char prod[128];
} OrderValues, *pOrderValues;

main()
{
   Py_SetProgramName("MyPyEval");
   Py_Initialize();
   PyRun_SimpleString("import sys\n");

   /** Expression to parse in Python syntax:
       if ( (size < 1000) & (vol < (0.001 * ADV)) & (prod=="Stock")) :
	      print "OK"
       else
	      print "NOK"
    **/
   char szExpr[1024];
   memset(szExpr,'\0',sizeof(szExpr));
   sprintf(szExpr," if ( (size < 1000) & (vol < (0.001 * ADV)) & (prod==\"Stock\")): print \"OK\" \nelse: print \"NOK\" \n");

   // Parse & compile this expression at startup & store the code object
   PyObject* co = Py_CompileString(szExpr,"<string>",Py_eval_input);
   if(pyco == NULL){
     Py_Finalize();
     exit(0);
   }
   PyCodeObject *pyCo = (PyCodeObject *)co;
   // Expression parsed & compiled ok, evaluate it multiple times
   PyObject *glb;
   glb = PyDict_New();
   PyDict_SetItemString(glb, "__builtins__", PyEval_GetBuiltins());

   while(1){
       // These values change at runtime as per user input
       // Here only one set of values are shown for simplicity
       OrderValues ordval;
          ordval.size = 100;
          ordval.ADV  = 100000;
          ordval.vol  = 1000;
          memset(ordval.prod,'\0',sizeof(ordval.prod));
          sprintf(ordval.prod,"Stock");

	   PyObject* vals = Py_BuildValue("(llls)",pVals->size,pVals->vol,pVals->ADV,pVals->prod);     
       PyEval_EvalCode(pyCo,glb,vals);
   }
   Py_Finalize();
}
//-----------------------------------------------------

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