Question

我正在尝试检查mpi4py如何在进程间传递对象。鉴于以下计划：

from mpi4py import MPI
import numpy as np
import sys

comm = MPI.COMM_WORLD
rank = comm.Get_rank()
size = comm.Get_size()


class ROOT(object):
    def __init__(self):
        self.x = 10

    def func(self, rank):
        print("Rank=%d is able to calculate the result: %d " % (rank, np.power(self.x, 2)))

obj= None
if rank == 0:
    obj = ROOT()
    comm.send(obj, dest=2)

if rank == 2:
    comm.recv(obj, source=0)
    obj.func(rank)

不幸的是，我收到了这个错误：

Traceback (most recent call last):
  File "test.py", line 47, in <module>
    obj.func(rank)
AttributeError: 'NoneType' object has no attribute 'func'
--------------------------------------------------------------------------
mpirun noticed that the job aborted, but has no info as to the process
that caused that situation.
--------------------------------------------------------------------------

排名2应该能够让obj.func打印出来，但有些错误！有人可以解释如何解决这个问题吗？感谢

Answer 1

没错，只需更换

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使用

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comm.recv不会就地修改obj。

mpi4py可以允许对象在进程之间传递吗？

1 个答案: