Call method of python class from C++ code

For example let us consider python class with the following structure in filemult.py.

mult.py

class Mult: 
      def __init__(self, first, second):
            self.a = first 
            self.b = second 

      def multiply(self):
            c = self.a*self.b
            print 'The result of', self.a, 'x', self.b, ':', c
            return c

How could we call multiply method from class above in C++ Code? (But without PyRun_SimpleString() function)

main.cpp

#include<python2.7/Python.h>
#include <boost/python.hpp>

int main()
{
     Py_Initialize();
     int a {10};
     int b {5};
     ... CODE HERE (a*b using python function)
     Py_Finalize();
}

I was looking a solution in Cython and boost.python but could not find it.

Additional links:

• First link
• Second link