为什么这段代码没有并行运行,运行它需要20秒,这意味着它是按顺序运行的。谢谢你的帮助。
import time
from queue import Queue
from threading import Thread
start = time.time()
def f():
time.sleep(0.5)
print("yes")
return 'yes'
def do_stuff(q):
while True:
output = q.get()
q.task_done()
q = Queue(maxsize=100)
for message_nbr in range(40):
q.put(f())
num_threads = 10
for i in range(num_threads):
worker = Thread(target=do_stuff, args=(q, ))
worker.setDaemon(True)
worker.start()
q.join()
print("time: ", time.time() - start) # ~20 seconds
