[C++-sig] Returning std::vector<int*> to python

[Pierre Barbier de Reuille]

You should have a look there :
 http://www.boost.org/libs/python/doc/v2/indexing.html

Otherwise, just export the instance of the class template as any other
class.

Pierre

Linh.H.Phan at jpl.nasa.gov a écrit :
> Hi Pierre,
> 
> Is there a simple tutorial somewhere that shows this process?
> 
> Thank you,
> 
> Linh
> 
>>Hi,
>>
>>If you want to return a value, you need to export it (or be sure it is
>>exported by Boost.Python), so here you need to define your Python class
>>for intVec.
>>
>>Then, you have to know that reference or pointer on Integer cannot
>>exists "as is" in Python. You'll have to wrap them ... that may be a
>>problem to export your intVec class.
>>
>>Pierre
>>
>>
>>Linh.H.Phan at jpl.nasa.gov a e'crit :
>>
>>>Hi,
>>>
>>>  I'm having a problem returning a std::vector<int*> to python:
>>>
>>>#include <vector>
>>>typedef std::vector<int*> intVec;
>>>class Node
>>>{
>>>public:
>>>  Node() {}
>>>  intVec& getIntVec() {
>>>    return intvec;
>>>  }
>>>  int computeSum(const intVec& intvec) {return 1;}
>>>  intVec intvec;
>>>};
>>>
>>>#include <boost/python/module.hpp>
>>>#include <boost/python/def.hpp>
>>>#include <boost/python.hpp>
>>>using namespace boost::python;
>>>
>>>BOOST_PYTHON_MODULE(hello)
>>>{
>>>    class_<Node>("Node", init<>())
>>>      .add_property("intvec"
>>>        , make_getter(&Node::intvec, return_internal_reference<>()))
>>>      .def("getIntVec", (intVec&(Node::*)())&Node::getIntVec,
>>>	   return_internal_reference<>())
>>>      .def("computeSum", &Node::computeSum)
>>>    ;
>>>}
>>>
>>>
>>>>>>>import hello
>>>>>>>test = hello.Node()
>>>>>>
>>>>>>test.computeSum(test.intvec)
>>>
>>>TypeError: No Python class registered for C++ class std::vector<int*, std::allocator<int*> >
>>>
>>>>>>test.computeSum(test.getIntVec())
>>>
>>>TypeError: No Python class registered for C++ class std::vector<int*, std::allocator<int*> >
>>>
>>>
>>>Can someone please help?
>>>
>>>Thank you very much!
>>>
>>>Linh
>>>_______________________________________________
>>>C++-sig mailing list
>>>C++-sig at python.org
>>>http://mail.python.org/mailman/listinfo/c++-sig
>>
> 

-- 
Pierre Barbier de Reuille

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