python - 如何在 python 2 中通过线程充分利用 CPU 内核

Question

下面的代码似乎是顺序执行的，而不是并发的。而且它只使用了一个 CPU 内核。有没有办法让它使用多个内核或在线程之间切换内容？(我希望它能像 java 中的 Thread 类一样工作。)

import threading 

def work(s) :
    for i in range(100) :
        print s
        for j in range (12345678) :
            pass

a = []
for i in range(3) :
    thd = threading.Thread(target = work('#'+str(i)))
    a.append(thd)

for k in a : k.start()
for k in a : k.join()

print "Ended."

Answer 1

线程不能利用 Python 中的多核。然而，进程可以。

multiprocessing is a package that supports spawning processes using an API similar to the threading module. The multiprocessing package offers both local and remote concurrency, effectively side-stepping the Global Interpreter Lock by using subprocesses instead of threads. Due to this, the multiprocessing module allows the programmer to fully leverage multiple processors on a given machine. It runs on both Unix and Windows.

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