[C++-sig] (David Abrahams)numpy.ndarray did not match PyArrayObject *

[Qinfeng(Javen) Shi]

Hi David,


>boost::python::lvalue_from_pytype<extract_array_object,&PyArrayObject_Type>();
>struct extract_array_object
> {
>     static PyArrayObject& execute(PyArrayObject& x)
>     {
>         return x;
>     }
> };
> Yes, the very subtle trick at the bottom of my posting
> "replace the indicated with the name of NumPy's python type object
> for ndarray."

Sorry, I don't get you.
The Python type of the ndarray is PyArray_Type. InC, every ndarray is a
pointer to a PyArrayObject structure.
So what is the extract_array_object and what is PyArrayObject_Type?
I tried
boost::python::lvalue_from_pytype<PyArray_Type,&PyArrayObject>();
boost::python::lvalue_from_pytype<extract_array_object,&PyArray_Type>();
boost::python::lvalue_from_pytype<ndarray,&PyArray_Type>();
boost::python::lvalue_from_pytype<extract_array_object,&PyArrayObject_Type>();
boost::python::lvalue_from_pytype<extract_array_object,&ndarray>();
boost::python::lvalue_from_pytype<PyArray_Type,&PyArray_Type>();
boost::python::lvalue_from_pytype<ndarray,&ndarray>();
boost::python::lvalue_from_pytype<PyArray_Type,&ndarray>();
They all failed.

Could you please tell me exactly?
-- 
Qinfeng(Javen) Shi

Research School of Information Sciences and Engineering
Australian National University
Locked Bag 8001
Canberra ACT 2601
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