Call method of python class from C++ code

Question

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

• Fred Larson: I think it's a duplicate:stackoverflow.com/q/3286448/10077
• Zakharov Aleksei: @FredLarson, thank you for your link (It is very helpful). But i didn't find how to get access (what function) to class (which in python module) and after that call some method of this class. If you could give a link to simple example, this would be great.
• Fred Larson: I think you'd just import it using something like PyObject* mult_module = PyImport_ImportModule("mult");. There are examples in the answers to the linked question.
• Olaf Dietsche: Maybe this stackoverflow.com/q/39813301/1741542 is better suited, because it creates an object and then uses it.
• Zakharov Aleksei: @OlafDietsche thank you very much for this link. It helps a lot :)