struct Example II

//boxes.i

%module boxes

%inline %{

struct Box {

double length;

double breadth;

double height;

};

Box *newBox(double l,

double b,

double h) {

Box *box = new Box;

box->length = l;

box->breadth = b;

box->height = h;

return box;

}

void deleteBox(Box *box) {

delete box;

}

%}

Creating the module:

$ swig -c++ -python boxes.i

$ g++ -fPIC -c boxes_wrap.cxx -I/usr/include/python3.4

$ g++ -shared boxes_wrap.o -o _boxes.so

Using the module in Python3:

>>> import boxes

>>> x = boxes.newBox(3,2,5)

>>> type(x)

<class 'boxes.Box'>

>>> x.height

5.0

>>> x.height = 7

>>> x.height

7.0

>>> y = boxes.Box()

>>> y.length

0.0