为列表的每个项创建流程

Question

我想为列表的每个项目创建一个进程实例。该过程应该一次只创建一个，新过程应该只在它完成之前创建。我该怎么做？

下面的代码不起作用，它只打印IP列表。

def performwork(IP):
    .................
    .................


for IP in listOfIPs:
    print IP
    multiprocessing.Process(target = performwork, args=(IP)) 

Answer 1

from contextlib import closing
from multiprocessing import Pool

with closing(Pool(processes=1)) as pool:
    pool.map(performwork, listOfIPs)