共享數組多處理 Python

Question

我正在使用共享數組在 Python 中運行多進程代碼。 問題是我無法初始化該數組...
要在我讀過的多進程程序中共享一個數組，我需要使用 multiprocessing.Array，但是當我按照下面的代碼嘗試它時，它沒有打印任何內容+我沒有錯誤消息。

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，請執行以下操作：

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[:]))