如何将字典中嵌套的numpy数组转换为JSON？

import numpy as np
import json

def convert_nested_array_to_json(dictionary):
    for key, value in dictionary.items():
        if isinstance(value, np.ndarray):
            dictionary[key] = value.tolist()  # 将NumPy数组转换为列表
        elif isinstance(value, dict):
            convert_nested_array_to_json(value)  # 递归处理嵌套字典

    json_str = json.dumps(dictionary)  # 将字典转换为JSON字符串
    return json_str