Monte Carlo simulation of button pushing game

kitten.py

#!/usr/bin/env python

from random import randint

def simulate():
    """Simulate one round of the game Gus described."""
    pushes = 1
    # Until a kitten pops out
    while randint(0, 99) != 0:
        # Push the button
        pushes += 1
    return pushes

iterations = 10000
print(sum(simulate() for i in range(iterations)) / float(iterations))