Is there a certain depth before python see's a number a zero?
<p>Long story short, I'm creating a graph using networkx and the lower the weights between nodes(edges) the better.</p>

<p>My problem is pagerank doesn't like getting a weight of zero and gives me an error.  So I was thinking is there a number that is essentially zero in python but not exactly zero. Something like 0.0000000000001? </p>

<p>or if my approach is really horrible(which I suspect it might) is there another way to deal with this?  Pagerank recussivily gets a score and then normalizes it against the entire dataset so scores tend to be very low as dataset gets larger(think 1/billion nodes).</p>
