Hi all,
I've been bashing my head against a wall for the past couple of days
trying to figure this out. It's frustrating because it seems like it
should be such a simple thing. I've also read through every archived
message I can find relating to this topic, but just can't seem to pull
it all together.
Here is a minimal example showing what I'm trying to do:
---------------------------------------------------------------
C++:
#include <boost/shared_ptr.hpp>
class Bar
{};
typedef boost::shared_ptr<Bar> BarPtr;
BarPtr mFooInstance = BarPtr(new Bar());
BarPtr getBar()
{
return mBarInstance;
}
--------------------------------------------------------------
C++ / Python binding:
#include <boost/python.hpp>
using namespace boost::python;
BOOST_PYTHON_MODULE(Foo)
{
class_<Bar, boost::noncopyable>("Bar", no_init);
def("getBar", &getBar);
register_ptr_to_python<BarPtr>();
}
--------------------------------------------------------------
Python:
import Foo
bar1 = Foo.getBar()
bar2 = Foo.getBar()
assert bar1 == bar2 # Assert fails due to bar1 and bar2 having
separate python objects
All I would like to achieve is for bar1 and bar2 to point to the same
python object, in the case where the object was created on the C++
side, such that I can add python attributes to such instances and have
this state preserved. Note that I am using a global mFooInstance for
simplicity, but in reality such object will be held as members or in
containers.
Thanks in advance for any help!
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