进程间通信 Queue

import  multiprocessing


def download_from_web(q):
    # 模拟从网上下载数据
    data = [11, 22, 33, 44]
    for i in data:
        q.put(i)
    print("---数据下载已写入到队列---")


def analysis_data(q):
    waitting_analysis_data = list()
    while not q.empty():
        waitting_analysis_data.append(q.get())
    print(str(waitting_analysis_data) + " <<< 数据拼接完毕")


def main():

    # 1. 创建一个队列
    q = multiprocessing.Queue(4)
    # 2. 创建多个进程,将队列的引用当作实参进行传递到里面
    p1 = multiprocessing.Process(target=download_from_web, args=(q,))
    p2 = multiprocessing.Process(target=analysis_data, args=(q,))

    p1.start()
    p2.start()

if __name__ == '__main__':
    main()