Not sure where I got this snipplet - most likely from reddit code or discussion.

from math import sqrt def confidence_fixed(ups, downs): if ups == 0: return -downs n = ups + downs z = 1.64485 #1.0 = 85%, 1.6 = 95% phat = float(ups) / n return (phat+z*z/(2*n)-z*sqrt((phat*(1-phat)+z*z/(4*n))/n))/(1+z*z/n)

Like for like in Julia

function confidence_fixed(ups,downs) if ups==0 return -downs end n = ups + downs z = 1.64485 #1.0 = 85%, 1.6 = 95% phat = float(ups)/n return (phat+z*z/(2*n)-z*sqrt((phat*(1-phat)+z*z/(4*n))/n))/(1+z*z/n) end

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