[Numpy-discussion] use of %extend
Michel Dupront
michel.dupront@hotmail...
Thu Apr 15 04:53:44 CDT 2010
Hello,
With the following example, given in the documentation:
struct Vector {
double x,y,z;
};
%extend Vector {
Vector __add__(Vector *other) {
Vector v;
v.x = $self->x + other->x;
v.y = $self->y + other->y;
v.z = $self->z + other->z;
return v;
}
};
one can do in python:
>>> import example
>>> v = example.Vector(2,3,4)
>>> w = example.Vector(10,11,12)
>>> print v+w
Vector(12,14,16)
>>>
There is something more that I would like to do but I don't
know how. I would like to be able to do:
>>>> v1 = v + 2
>>>> v2 = 2 + v
where v is a vector and 2 a number that would be added to each component
of the vector.
I would really appreciate any help on that.
Many thanks in advance.
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