Monte carlo pi guessing machine

gistfile1.py

import random
import sys

CIRCLE_RADIUS = 1
NUM_GUESSES = int(sys.argv[1])

def insideCircle(px, py):
    l = px**2 + py**2
    return (l <= CIRCLE_RADIUS)

inCircle = 0

for i in xrange(NUM_GUESSES):
    x = random.random()
    y = random.random()
    if(insideCircle(x,y)):
        inCircle += 1

print (inCircle/float(NUM_GUESSES))*4

Only works for CIRCLE_RADIUS = 1