python简单粗暴多进程之concurrent.futures

# !/usr/bin/python3.4
# -*- coding: utf-8 -*-

from concurrent.futures import ThreadPoolExecutor
import time

def f1(a):
    time.sleep(2)
    print(a)
    return 1

pool=ThreadPoolExecutor(5)
for i in range(30):
    a=pool.submit(f1,i)