Casting PyArrayObjects to C types

[Kragen Sitaker]

spam at fisher.forestry.uga.edu (Chris Fonnesbeck) writes:
> Most of the references to interacting python with C are with respect
> to extending, rather than embedding python. I am interested in the
> latter.

Section 5 of "Extending and Embedding the Python Interpreter" is
about embedding it.

> For example, how can I take a PyArrayObject, say a
> PyArray_DOUBLE and convert it to a double[] type in C? I have a C
> function that must call python code to get a Numeric Python array,
> change it to a standard C array, and return it.  How would I do this.

There are sections in the Numerical Python docs about this; see
section 12, "Writing a C Extension to Numpy".  Myself, I found it very
helpful to read the Numerical Python source code.