Calling Python scripts from C/C++ program

[Phil Austin]

srvalipe at hotmail.com writes:

> I am new to Python programming. I am writing a simple C++ application
> that calls (embeds) a python script. I couldn't find good examples on
> how to do this at www.python.org website.
> 
> The following is my python script:
> 
> def FibSeries(first=1, next=1, last=10):

Here's a solution using CXX (http://CXX.sourceforge.net).  Note that
I put FibSeries into a file called myfun.py:

callable.cxx:

#include "Python.h"
#include "CXX_Objects.h"
#include <iostream>
#include <algorithm>

using namespace Py;
using namespace std;

extern "C" void Py_Initialize();
extern "C" void Py_Finalize();

int
main(int argc, char* argv[])
{
  Py_Initialize();
  Module myfun("myfun");
  Callable fib = myfun.getAttr("FibSeries");
  Tuple argtuple(3);
  argtuple[0]=Int(2);
  argtuple[1]=Int(2);
  argtuple[2]=Int(30);
  Object output = fib.apply(argtuple);
  cout << List(output) << endl;
  Py_Finalize();
  return 0;
}


Compiling and executing this give:

<peacock ~> callable
2
4
6
10
16
26
[2, 4, 6, 10, 16, 26]

Regards, Phil

Phil Austin		INTERNET: phil at geog.ubc.ca
(604) 822-2175		FAX:	  (604) 822-6150

http://www.geog.ubc.ca/~phil
Associate Professor
Atmospheric Sciences Programme
Geography #217
University of British Columbia
1984 W Mall
Vancouver, BC  V6T 1Z2
CANADA