On Thu, 1 May 2008, Jose Luna wrote:
> I am using the std::vector template to contain a set of objects.
>
> %include "std_vector.i"
> namespace std {
> %template(vector_cgv) vector<CGVertex>;
> };
>
> Everything works fine when I bring the vector into Python, but when I
> iterate through the vector it returns a copy of the object instead of
> the object itself. For example, if vertices is my vector:
>
> for vertex in vertices:
> vertex.tmp = 1
> print vertex[0].tmp
>
> This code will cause the following error: "AttributeError: tmp". The
> tmp attribute assigns fine, but it's assigning it to a copy of the
> vertex object, so when I try to go back and access that attribute it
> isn't there. (I've confirmed this through further testing.) I realize
> that I could simply build a new list of objects, but that would be
> inefficient and I'm hoping for a more elegant solution.
I'm not sure I understand. Is tmp a member of the C++ class, or is it
something you add to the Python object by that assignment? If it's just
being added to the Python object, of course it won't affect the underlying
C++ object (where would the data go?) an the print statement will fail.
Josh
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