Python 多进程 —— 共享数据

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尝试一：

# -*- coding:utf-8 -*-from multiprocessing import Process, Managerimport timeimport randomdef kkk(a_list, number):    for i in range(10):        a_list.append(i)        time.sleep(random.randrange(2))        print('这是进程{} {}'.format(number, a_list))    print('这是进程{} {}'.format(number, a_list))def jjj(a_list):    for i in range(2):        process = Process(target=kkk, args=(a_list, i))        process.start()if __name__ == '__main__':    a_list = []    process_0 = Process(target=jjj, args=(a_list,))    process_0.start()    process_0.join()    print(a_list)    print(len(a_list))    print('it\'s ok')

输出：

这是进程0 [0]这是进程0 [0, 1]这是进程0 [0, 1, 2]这是进程0 [0, 1, 2, 3]这是进程1 [0]这是进程0 [0, 1, 2, 3, 4]这是进程1 [0, 1]这是进程0 [0, 1, 2, 3, 4, 5]这是进程1 [0, 1, 2]这是进程1 [0, 1, 2, 3]这是进程1 [0, 1, 2, 3, 4]这是进程1 [0, 1, 2, 3, 4, 5]这是进程0 [0, 1, 2, 3, 4, 5, 6]这是进程0 [0, 1, 2, 3, 4, 5, 6, 7]这是进程0 [0, 1, 2, 3, 4, 5, 6, 7, 8]这是进程1 [0, 1, 2, 3, 4, 5, 6]这是进程0 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]这是进程0 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]这是进程1 [0, 1, 2, 3, 4, 5, 6, 7]这是进程1 [0, 1, 2, 3, 4, 5, 6, 7, 8]这是进程1 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]这是进程1 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9][]0it's okProcess finished with exit code 0

尝试二：

使用 Manager

# -*- coding:utf-8 -*-from multiprocessing import Process, Managerimport timeimport randomdef kkk(a_list, number):    for i in range(10):        a_list.append(i)        time.sleep(random.randrange(2))        print('这是进程{} {}'.format(number, a_list))    print('这是进程{} {}'.format(number, a_list))def jjj(a_list):    for i in range(2):        process = Process(target=kkk, args=(a_list, i))        process.start()if __name__ == '__main__':    manager = Manager()    a_list = manager.list()    # a_list = []    process_0 = Process(target=jjj, args=(a_list,))    process_0.start()    process_0.join()    print(a_list)    print(len(a_list))    print('it\'s ok')

输出：

这是进程0 [0, 0]这是进程0 [0, 0, 1]这是进程0 [0, 0, 1, 2]这是进程0 [0, 0, 1, 2, 3]这是进程0 [0, 0, 1, 2, 3, 4]这是进程1 [0, 0, 1, 2, 3, 4, 5]这是进程0 [0, 0, 1, 2, 3, 4, 5, 1]这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6]这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2]这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3]这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4]这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5]这是进程0 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6]这是进程0 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7]这是进程0 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8]这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9]这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7]这是进程0 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8]这是进程0 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8]这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8]这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8, 9]这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8, 9][0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8, 9]20it's okProcess finished with exit code 0

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