Yep, that seems to give roughly (if not exactly) the same answer as before.  A little re-arranging of the terms comes up with this:

def get_weights2(dists):<br></br>
    total = 0.0<br></br>
    result = [0.0 for i in dists]<br></br>
    for di in range(len(dists)):<br></br>
        result[di] = 1.0 /
dists[di]<br></br>
        total += result[di]<br></br>
    for i in range(len(result)):<br></br>
        result[i] = result[i] /
total<br></br>
    return result<br></br>

...although it's not too likely, I think I'd add back some divide-by-zero checking (at least on the original dists[] list).

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