कोडिंग कार्यप्रवाह · सटीक असंशोधित गिनी गुणांक

from fractions import Fraction

def gini_fraction(values):
    if type(values) is not list or not 1 <= len(values) <= 4096 or any(type(x) is not int or not 0 <= x <= 10**9 for x in values):
        raise ValueError("gini.values")
    total, n = sum(values), len(values)
    if total == 0:
        return Fraction(0, 1)
    numerator = sum((2*i-n-1)*value for i, value in enumerate(sorted(values), 1))
    return Fraction(numerator, n*total)