heads_and_tails_game.py

#!/usr/bin/env python
from random import randint

RANGE = 1000000

def random_guess(RANGE):
    wins = []
    for _ in range(0, RANGE):
        guess = randint(0, 1)
        outcome = randint(0, 1)
        if guess == outcome:
            wins.append(1)
    return wins

def same_guess(RANGE):
    wins = []
    for _ in range(0, RANGE):
        outcome = randint(0, 1)
        if outcome == 1:
            wins.append(1)
    return wins

guess = random_guess(RANGE)
same = same_guess(RANGE)

print "guess: %s\tsame: %s" % (
    len(guess)/(RANGE * 1.0),
    len(same)/(RANGE * 1.0))
# Where "guess" is randomly guessing heads or tails and "same" is always choosing heads.
#
# Sample run:
# guess: 0.499779    same: 0.499628
# In other words, no difference.