如何将Cython中的大型malloc数组作为Python对象返回或保存？

cimport numpy as np
from libc.stdlib cimport malloc, free

def create_large_array(int size):
    cdef int* arr = <int*>malloc(size * sizeof(int))
    # 在此处进行数组初始化或其他操作
    return <np.ndarray[np.int32_t, ndim=1]>np.PyArray_SimpleNewFromData(1, &size, np.NPY_INT32, <void*>arr)

def save_large_array(np.ndarray[np.int32_t, ndim=1] arr, str filename):
    cdef FILE* file = fopen(filename.encode(), "wb")
    fwrite(arr.data, sizeof(int), arr.shape[0], file)
    fclose(file)

free(arr)