#!/usr/bin/env python
import os
from multiprocessing import Pool

res_dir="."
def run(filename):
    print (filename);
    os.system("sleep 2s")


input_dir='.'
if __name__ == '__main__':
    p = Pool(2)
    file_list = os.listdir(input_dir);
    p.map(run, file_list);
    print ("finish")