passing a numpy object to decorator creator

[tom]

I have a c++ class nPhysD and I'm trying to have a creator based on a numpy array.

Here is the wrapper defining the new_ python creator taking PyObject as argument:

class nPhysPyWrapper : public QObject {
    Q_OBJECT

public slots:
[...]
    nPhysD* new_nPhysD(PyObject* my_py_obj){
    //do something
    }
}

But the creator doesn't get called and from within () Python I get:

ValueError: Could not find matching overload for given arguments:
(array([[ 10.,  11.,  10., ...,  11.,  11.,  11.],
       [ 11.,  11.,  11., ...,  11.,  11.,  11.],
       [ 11.,  11.,  11., ...,  11.,  11.,  11.],
       ..., 
       [ 11.,  11.,  11., ...,  10.,  11.,  11.],
       [ 11.,  11.,  11., ...,  11.,  11.,  11.],
       [ 11.,  11.,  11., ...,  11.,  11.,  11.]]),)
 The following slots are available:
nPhysD(PyObject my_py_obj) -> nPhysD
[...]

I tried by replacing Pyobject* with PyArrayObject* but I get the same error.

How do I do?

[Florian Link]

I will have to try that myself, it should work... It has to be PyObject pointer, since that is the name that is checked in PythonQt, so PyArrayObject will surely fail.

[Florian Link]

The following worked for me:

QObject* new_QObject(PyObject* test) { std::cout << "called" << std::endl; return new QObject(); }

And I can call QtCore.QObject(somePythonObject). The important thing is that your method needs to return a new object, if it returns NULL you will get an error.

[tom]

wow, I missed that you need to actually return something (I still belive ther's som magic behind the way pytohnqt scrapes the metasystem).
I did put nullptr to do some tests before returing a proper object.

Now it works.

Thanks a million.