Experiment on random.randrange

e.py

import random

i = 0

ratio = {}

rounds = 10000000

while i < rounds:
    r = random.randrange(1, 11)
    if r in ratio:
        ratio[r] = ratio[r] + 1
    else:
        ratio[r] = 1
    i = i + 1

for item in ratio:
    print (str(item) + ': ' + str((ratio[item] / float(rounds)) * 100) + '%')