'''Replacement for pickle.dump() using ForkingPickler.'''

可以使用以下代码替代pickle.dump()：

import os
import pickle
from multiprocessing import Process, Pipe
from multiprocessing.reduction import ForkingPickler

def save_object(obj, filename):
    parent_conn, child_conn = Pipe()
    process = Process(target=_save_object, args=(child_conn, obj))
    process.start()
    with open(filename, 'wb') as f:
        ForkingPickler(f, protocol=pickle.HIGHEST_PROTOCOL).dump(parent_conn.recv())
    process.join()

def _save_object(conn, obj):
    conn.send(obj)
    conn.close()

这个函数使用了ForkingPickler来序列化对象，这样就可以在多进程环境下使用pickle.dump()。