Question

从并行运行的所有进程收集数据的最佳方法是什么？获取单个流程的返回值不是问题，而是如何聚合它们？

class Controller(object):

    def get_square(self,a):
        return a*a

if __name__=="__main__":
    controller=Controller()
    jobs=[]
    for param in (10,20,30):
        process=Process(target=controller.get_square,kwargs={"a":param})
        jobs.append(process)
        process.start()
    for job in jobs:
        job.join()
    # printing result for all processes

Answer 1

from multiprocessing import Process, Queue

def square(a, qOut):
    qOut.put(a**2)

if __name__ == "__main__":
    qOut = Queue()
    params = (10, 20, 30)
    jobs = []
    for p in params:
        proc = Process(target=square, kwargs={'a':p, 'qOut':qOut})
        jobs.append(proc)
        proc.start()
    for job in jobs:
        job.join()
    for i in range(len(params)):
        print(qOut.get())

如何连接来自不同进程的返回数据

1 个答案: