Numeric Python and C

[Simon Burton]

On Wed, 14 Jan 2004 19:17:55 +0000, Ognen Duzlevski wrote:

> Hi,
> can someone explain how to change a value within an array from a C
> function?
> 

What about using PyObject_GetItem (is that what it's called?)

I know numarray uses functions for this:

PyArrayObject* NA_InputArray(	PyObject *numarray, NumarrayType t, int requires)
    The purpose of NA_InputArray is to transfer array data from Pythonto C. 

PyArrayObject* NA_OutputArray(	PyObject *numarray, NumarrayType t, int requires)
    The purpose of NA_OutputArray is to transfer data from C to Python. Practically speaking, the output numarray must be a PyArrayObject, and cannot be an arbitrary Python sequence. 

PyArrayObject* NA_IoArray(	PyObject *numarray, NumarrayType t, int requires)
    NA_IoArray has fully bidirectional data transfer, creating the illusion of call-by-reference. 


Simon.