Python实现多进程共享数据的方法分析

2020-01-04 16:12:08

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本文实例讲述了Python实现多进程共享数据的方法。分享给大家供大家参考，具体如下：

示例一：

# -*- 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

示例二：

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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