Testing numpy memmap with multiprocessing

test_numpy_memmap.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-
import multiprocessing
import numpy as np

def print_matrix(matrix):
    print matrix

def main():
    matrix = np.memmap('test.dat', dtype='int16', mode='w+', shape=(100, 100))
    p = multiprocessing.Process(target=print_matrix, args=(matrix,))
    p.start()
    p.join()

if __name__ == '__main__':
    main()