有没有办法在numba中将timedelta64转换为int64？

import numpy as np
from numba import njit

@njit
def timedelta64_to_int64(timedelta_array):
    return timedelta_array.astype(np.int64)

timedelta_array = np.array(['1 days', '2 days', '3 days'], dtype='timedelta64[D]')
int64_array = timedelta64_to_int64(timedelta_array)