python - MPI4py：MPI通过进程之间的循环进行通信

Question

我的程序中有 2 个进程。process(0)主人在哪里，process(1)从哪里来。两者都有一个共同的循环（从 0 增加到 4）。我正在尝试将 value( i) 发送到process(1)from process(0)。但process(1)没有得到ifrom的新值process(0)。

cw = MPI.COMM_WORLD
rank = cw.Get_rank()
nProcesses = cw.Get_size()

currentTrial = np.zeros(nProcesses-1, dtype='int32')
receivedTrial = np.zeros(1, dtype='int32')

i = 0   
while (i < 5):
    if (rank == 0):
        currentTrial[0] = 0
        #print(i)
        sendToSlave = cw.Isend(currentTrial[0:1], dest=1)
        print(sendToSlave.Test())

        i = i+ 1
        currentTrial[0] = i

    if (rank != 0):
        #receive a trial number 
        receiveFromMaster = cw.Recv(receivedTrial[:], source=0)
        print("rank", rank,receivedTrial)

这是目前我得到的输出：

True
rank 1 [0]
True
True
True
True
rank 1 [0]
rank 1 [0]
rank 1 [0]
rank 1 [0]

理想情况下，process(1)应该打印[0] [1] [2] [3] [4]