pi.py

#!/usr/bin/env python

from math import sqrt
from sys import argv, exit
from os import getpid, system
from random import random

argc = len(argv)
if argc != 2:
    print("Usage: ./pi.py num_steps")
    exit(1)

inside = 0
n = int(argv[1])

for i in range(0, n):
    x = random()
    y = random()
    if sqrt(x*x+y*y) <= 1:
        inside += 1

pi = 4*inside/n
print(pi)