Re: [boost] [python] Expose a struct with a std::vector<std::string> member

Subject: Re: [boost] [python] Expose a struct with a std::vector<std::string> member
From: Tiago Coutinho (coutinhotiago_at_[hidden])
Date: 2009-02-04 11:22:08

Could you give me an example?

I tried something like:

#include <vector>
#include <string>
#include <boost/python.hpp>
#include <boost/python/suite/indexing/vector_indexing_suite.hpp>

struct ExampleStruct
{
    std::vector<std::string> elements;
};

class_<A>("A", init<>())
    .def_readonly("elements",
vector_indexing_suite<std::vector<std::string> >())
;

Of course the above code is wrong. My question is how should I
initialize the vector_indexing_suite.

Thank you very much in advance

Cheers
Tiago

On Tue, Feb 3, 2009 at 6:31 PM, Stefan Seefeld <seefeld_at_[hidden]> wrote:
> Tiago Coutinho wrote:
>>
>> Hello all,
>>
>>          I am new to boost::python. I have access to a C++ library which I
>> want
>>        to expose to python using boost. One of the structs I want to
>> expose is
>>        something like:
>>
>>        #include <vector>
>>        struct ExampleStruct
>>        {
>>                std::vector<std::string> elements;
>>        };
>>
>>          I would like to expose this class but I like to avoid having to
>> write
>>        a wrapper that would inefficiently have to copy the vector contents
>> to a
>>        boost::python::list member.
>>          Is there a way to do this?
>>
>
> You may use the indexing-suite to expose the above as a container (with
> iterators etc.). However, note that strings in Python are immutable, so you
> can't modify them in-place.
>
> Regards,
>      Stefan
>
> --
>
>     ...ich hab' noch einen Koffer in Berlin...
>
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