共享数组多处理 Python

Question

我是运行一个共享数组的Python多进程代码。问题是我无法初始化该数组...
要在我读过的多进程程序中共享一个数组，我需要使用 multiprocessing.Array，但是当我像在下面的代码没有打印任何内容 + 我没有错误消息。

import multiprocessing
...
...

if  __name__ == "__main__":

   an_array= multiprocessing.Array("i", [1,2])

   print(an_array)       # why does it not print anything? I was expecting to print [1,2]

   p1 = multiprocessing.Process(target=function1, args = [an_array, 3]

Answer 1

要打印 Array 中的元素，请执行以下操作：

import multiprocessing

if __name__ == '__main__':

    an_array = multiprocessing.Array("i", [1, 2])

    # first choice to print element in Array:
    for element in an_array:
        print(element)

    # second choice to print elements in Array:
    print(an_array[:])

    # third choice to print elements in Array:
    print(list(an_array[:]))