#CalPi.py

 from random import random

 from math import sqrt

 from time import clock

 DARTS = 10000000

 hits = 0.0

 clock()

 for i in range(1, DARTS+1):

     x, y = random(), random()

     dist = sqrt(x ** 2 + y ** 2)

     if dist <= 1.0:

         hits = hits + 1

 pi = 4.0 * (hits/DARTS)

 print("pi值是{}".format(pi))

 print("运行时间是：{:5.5}s".format(clock()))