進程和線程的區別

<code>from multiprocessing import Pool
import time
import random
import os


def work(msg):
    start = time.time()
    print("work{}開始執行,id為{}".format(msg, os.getpid()))
    time.sleep(random.random()*2)
    stop = time.time()
    print("work{}耗時{}.".format(msg, stop-start))

p = Pool()
for i in range(10):
    # 非堵塞運行
    p.apply_async(work, args=(i,))
    # 堵塞進行
    # p.apply(work, args=(i,))


print("開始")
p.close()
p.join() 

print("結束")/<code>

• 線程實現

<code>import threading
import os
from time import sleep

def sorry(i):
    print('say sorry  {}'.format(i))
    sleep(1)

if __name__ == '__main__':
    for i in range(1,10):
        t = threading.Thread(target=sorry, args=(i,))
        t.start()/<code>

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關鍵字: 中央處理器 進程 地址