python - 并行更新数组？

Question

假设我有一个 python 列表:

def func(arr, i):
    arr[i] = arr[i] + ' hello!'

xyz = ['a','b','c','d','e']

for i in range(len(xyz)):
     func(xyz, i)

for i in xyz:
     print i

最后

a hello!
b hello!
c hello!
d hello!
e hello!

由于我的列表非常大，如何使用 muticore 并行更新列表的元素？

我查遍了，似乎找不到答案。

Answer 1

感谢@roganjosh的建议，我找到了答案:

import numpy as np
from multiprocessing import Pool

arr = ['a','b','c','d','e','f','g']

def edit_array(i):
    return arr[i] + ' hello!'

if __name__=='__main__':
    pool = Pool(processes=4)
    list_start_vals = range(len(arr))
    array_2D = pool.map(edit_array, list_start_vals)
    pool.close()
    print array_2D