WHY GODDDD

integral.py

import sys,time,random
from multiprocessing import Pool

def integral_helper((f,start,end,num_samples)):
	return sum( (f((end-start)*random.random()+start) for i in xrange(num_samples)))

def integral(f,start,end,num_processes):
	WORK_ITEMS = 100;
	pool = Pool(processes=num_processes)
	args = (f,start,end,WORK_ITEMS/num_processes)
	acc = sum(pool.map(integral_helper,(args for i in xrange(num_processes))))
	return acc*(end-start)/WORK_ITEMS

def f1(x):
	return 4/(1+x*x)
def main():
	t1 = time.time()
	print "Integral:",integral(f1,0,4,1)
	t2 = time.time()
	print "Time:", t2-t1

main()