def METHOD_NAME(args):
    if len(args) < 3:
        print("Usage: {} merge a.npz b.npz output.npz".format(sys.argv[0]))
        exit(-1)
    num = len(args)
    npz_out = {}
    for i in range(num-1):
        data = np.load(args[i])
        npz_out.update(data)
    np.savez(args[num-1], **npz_out)