Penney's game simulation

pennygame.py

import numpy as np

N = 10000
winfreq = np.array([0, 0])
playerA = "111"
playerB = "011"

for i in xrange(N):
    res = [2, 2, 2]
    while True:
        res.pop(0)
        coin = np.random.randint(2)
        res.append(coin)
        bin_res = "".join(map(str, res))
        if bin_res == playerA:
            winfreq[0] += 1
            break
        elif bin_res == playerB:
            winfreq[1] += 1
            break

winrate = winfreq * 1.0 / N
print "win rate:"
print winrate
print "playerB / playerA = ", winrate[1] / winrate[0]