作者:
FFALAN (Alan)
2018-01-30 23:34:34from time import sleep
from multiprocessing import Process, Lock
def time_delay(d):
sleep(d)
def printer(item, lock):
print(item)
lock.acquire()
print('time delay start')
time_delay(1)
print('time delay end')
lock.release()
if __name__ == '__main__':
lock = Lock()
items = ['item1', 'item2', 'item3']
for item in items:
p = Process(target=printer, args=(item, lock))
p.start()
請問各位前輩,為何輸出結果是
item1
time delay start
time delay end
item2
time delay start
time delay end
item3
time delay start
time delay end
而不是
item1
item2
item3
time delay start
time delay end
time delay start
time delay end
time delay start
time delay end
明明print item的時候還沒被Lock住阿...
而且他是先執行time_delay才開始print item...
請問是我哪裡誤會了lock的用法?
謝謝各位!