Python3 里面的线程池

from concurrent.futures import ThreadPoolExecutor,ProcessPoolExecutor
import time
def task(i):
    print(i)
    time.sleep(1)
pool = ThreadPoolExecutor(10)   #先定义一个线程池

for index in range(64):
    pool.submit(task,index)

print('end')

在这里 

ThreadPoolExecutor  是封装了线程池

ProcessPoolExecutor 是封装了进程池

如果想用进程池。只需修改代码为

pool = ProcessPoolExecutor(10)   #先定义一个进程池