On Tue, Apr 5, 2011 at 8:11 AM, M. <infinity.probability@gmail.com> wrote:

Hi all,

I've been using numpy without problems - version .1.4.1-5 - until this morning, when I upgraded my Debian sid system to numpy 1.5.1-2. A function that was working that uses np.power

def get_far_field(self, chi, n): return np.sum(self.an[n,1:self.j] * np.power(chi,-np.arange(1,self.j)))

outputs "Warning: overflow encountered in power". I'm using python 2.6.6-12. Is this a bug in the numpy library or (more probably) my code? If it's in my code, what can be happening? How to debug it?

Hard to say. Some warnings that were disabled by accident in earlier versions of numpy were enabled in numpy 1.5, so it is possible the problem has always been there. You might retry with the earlier version and use seterr to enable the overflow warning just to check. A simple example with actual numbers that reproduces the warning might also be helpful. Chuck