from math import hypot
from random import expovariate
from itertools import permutations, starmap, repeat
from collections import Counter

def test(trials, n):
    lambdas = [1.0E-3 ** exp for exp in range(n)]
    for i in repeat(None, trials):
        data = list(map(expovariate, lambdas))
        assert len(set(starmap(hypot, permutations(data)))) == 1, data

test(trials = 1_000_000_000, n=5)
print('Done')