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get the shape of a numpy ndarray in C++ code [boost.python]

P: n/a
[sorry is half a post appeared earlier. Bloody Google groups...]


I'm trying to use a numpy array in C++ (win2000) using boost.python.

Test code:
void test( numeric::array& nsP)
object shape = nsP.getshape();
int rows = extract<int>(shape[0]);
int cols = extract<int>(shape[1]);

At first, running it in Python got me this message:

ArgumentError: Python argument types in
did not match C++ signature:
wr_conn(class boost::python::numeric::array {lvalue})

I fixed this using this line:

numeric::array::set_module_and_type( "numpy", "ndarray");

[was that right?]
At least it got me one step further; the array is accepted. Now the
message is this:

AttributeError: 'numpy.ndarray' object has no attribute 'getshape'

Now I'm stumped. The only thing I can find is

which regrettably ends with the same question. What's wrong here?


Nov 9 '07 #1
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