python - 使用python在Windows上进行多处理管道

Question

Windows 是否支持 multithreading.pipes()？如果是，那么这段代码有什么问题？我需要使用减少吗？代码挂在 p2.recv() 上，从命令行运行时出现 RuntimeError 。

import multiprocessing
def ProcessCreator(pipe):
    pipe.send("hello from other process")

p1, p2 = multiprocessing.Pipe()
proc = multiprocessing.Process(target = ProcessCreator, args = (p2,))
proc.start()
print p1.recv()

if __name__ == "__main__":
    multiprocessing.freeze_support()

Answer 1

您需要将管道代码放入if __name__ == '__main__'部分。（为什么？）并将p2.recv更改为p1.recv

import multiprocessing
def ProcessCreator(pipe):
    pipe.send("hello from other process")

if __name__ == "__main__":
    multiprocessing.freeze_support()
    p1, p2 = multiprocessing.Pipe()
    proc = multiprocessing.Process(target = ProcessCreator, args = (p2,))
    proc.start()
    print p1.recv()