from multiprocessing.dummy import Pool as ThreadPool
from time import sleep
import random

class bob:
    def __init__(self):
        self.res = []
    def do(self,x):
        l = [True,False]
        if random.choice(l):
            sleep(3)
        self.res.append(x)
        return 'bob'+str(x)


urls = [
  1,2,3,4,5,6,7,8,9,10
]


for i in xrange(3):
    b = bob()
    # make the Pool of workers
    pool = ThreadPool(4)

    # open the urls in their own threads
    # and return the results
    pool.map(b.do, urls)

    # close the pool and wait for the work to finish
    pool.close()
    pool.join()
    print 'nn'
    for r in b.res:
        print r