多进程问题中目标函数错误

Question

当我运行下面的代码:

import multiprocessing
sum1 = 0
def list_append_1(out_list):
    global sum1
    for i in out_list:
        sum1 += i
    return sum1
lista_1 = [i for i in xrange(500)]
process_1 = multiprocessing.Process(target=list_append_1, args=lista_1)
jobs = []
jobs.append(process_1)
for j in jobs:
     j.start()

我

:

TypeError: list_append_1() takes exactly 1 argument (500 given)

虽然我只传递一个参数给list_append_1()函数。怎么了?

Answer 1

参数应该这样传递:

process_1 = multiprocessing.Process(target=list_append_1, args=(lista_1,))