kakutora SR probability calculator

calc.py

import random

good = 0
total = 0


def draw10():
    return sum(draw() for _ in range(10))


def draw():
    """Return draw good."""
    return random.random() < 0.03

for _ in range(1000000):
    x = 0
    while True:
        x += 1
        if draw10() > 0:
            break
    good += x
    total += 1

print(good / total)