On 05/12/2012 12:22 PM, DarkAnt wrote:
I'm trying to create a boost::python::dict that stores another
boost::python::dict.
int main()
{
Py_Initialize();
boost::python::dict parent;
try{
parent["child_dict"] =
boost::make_shared<boost::python::dict>(boost::python::dict());
}
catch(...){
PyErr_Print();
}
return 0;
}
TypeError: No to_python (by-value) converter found for C++ type: class
boost::shared_ptr<class boost::python::dict>
I was under the impression that boost::shared_ptr had special
treatment in boost::python(that is the library already knew what to do
with it). I'm not quite sure if I'm supposed to write this to_python
converter or if I'm supposed to achieve this in a different manner. If
I do write the to_python converter what's the method of keeping track
of both reference counts?
There's no need to use shared_ptr on Python objects; those will be
tracked using Python's own reference counting system.
Just doing
parent["child_dict"] = boost::python::dict();
will do what you want.
Note that boost::python::dict (as well as boost::python::object, etc.)
is actually a smart pointer itself, holding a PyObject* and
incrementing/decrementing the reference count in the C++ copy
constructor, assignment operator, and destructor.
HTH!
Jim
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