C-extension in Python -- returning results

[Fredrik Lundh]

Keith Farmer wrote:
> I don't understand what the '-1.#IND' returns indicate.

IEEE indeterminates.

the following site mentions things like (infinity - infinity) and
(0 x infinity):

http://www.research.microsoft.com/~hollasch/cgindex/coding/ieeefloat.html

and -1.#IND is exactly what the following small program prints
(if compiled under MSVC, at least):

main()
{
    double a = 1.0;
    double b = 0.0;
    double c = a / b;
    double d = c - c;
    printf("%g", d);
}

maybe you're dividing by zero somewhere in there?  adding a few
strategic printf statements to your code might help you figure out
where things go wrong.

(and I'm sure tim will correct me if I'm wrong)

</F>