在python进程之间共享资源

Question

I am wanting to share multiple resources between multiple python scripts. Ideally what I am trying to do is run my main program. It contains some script wide variables. I then want to fork off the exact same program into a new shell and give it access to my script wide variables.

I am looking into multiprocessing but I am not sure if another way would be better such as using pipes?

Answer 1

You can use Value and Array from multiprocessing for shared memory across processes.

Example from multiprocessing 's documentation :

from multiprocessing import Process, Value, Array

def f(n, a):
    n.value = 3.1415927
    for i in range(len(a)):
        a[i] = -a[i]

if __name__ == '__main__':
    num = Value('d', 0.0)
    arr = Array('i', range(10))

    p = Process(target=f, args=(num, arr))
    p.start()
    p.join()

    print(num.value)
    print(arr[:])

will output:

3.1415927
[0, -1, -2, -3, -4, -5, -6, -7, -8, -9]